HEP Phenomenology·hep-ph

Mon·Jan 30, 2023Monday·January 30, 2023

28 papers—17 primary·11 cross-listed·reconstructed*

01*
SN1987A neutrino burst: limits on flavor conversion
Pedro Dedin Neto🇧🇷 · Marcos V. dos Santos🇧🇷 · Pedro Cunha de Holanda🇧🇷 · Ernesto Kemp🇧🇷
In this paper, we revisit the SN1987A neutrino data to see its constraints on flavor conversion. We are motivated by the fact that most works that analyze this data consider a specific conversion mechanism, such as the MSW (Mikheyev-Smirnov-Wolfenstein) effect, although flavor conversion is still an open question in supernovae due to the presence of neutrino-neutrino interactions. In our analysis, instead of considering a specific conversion mechanism, we let the electron antineutrino survival probability $P_{e e}$ be a free parameter. We fit the data from Kamiokande-II, Baksan, and IMB detected spectrum with two classes of models: time-integrated and time-dependent. For the time-integrated model, it is not possible to put limits above $1 σ$ (68% confidence level) on the survival probability. The same happens for the time-dependent model when cooling is the only mechanism of antineutrino emission. However, for models considering an accretion phase, $P_{e e} \sim 0$ is strongly rejected, showing a preference for the existence of an accretion component in the detected antineutrino flux, and a preference for normal mass ordering when only the MSW is present.
hep-phEPJC(2023)·13 citations
02*
Photons from dark photon solitons via parametric resonance
Mustafa A. Amin🇺🇸 · Andrew J. Long🇺🇸 · Enrico D. Schiappacasse🇺🇸
Wave-like dark matter made of spin-1 particles (dark photons) is expected to form ground state clumps called "vector solitons", which can have different polarizations. In this work, we consider the interaction of dark photons with photons, expressed as dimension-6 operators, and study the electromagnetic radiation that arises from an isolated vector soliton due to parametric resonant amplification of the ambient electromagnetic field. We characterize the directional dependence and polarization of the outgoing radiation, which depends on the operator as well as the polarization state of the underlying vector soliton. We discuss the implications of this radiation for the stability of solitons and as a possible channel for detecting mergers of vector solitons through astrophysical observations.
hep-phastro-ph.COJCAP(2023)·24 citations
03*
Studying the resonance production cross-section of the heavy vectors within Heavy Vector Triplet model
T.V. Obikhod🇺🇦 · I.A. Petrenko🇺🇦
In the context of TeV-scale extensions of the Standard Model both the experimental searches and the construction of phenomenological models for the new heavy bosons searches are used by us. Heavy particles predicted by a the Simplified Model constructed to describe only the on-shell resonance, have to be compared with LHC data. Heavy bosons have certain properties that can be calculated within the Heavy Vector Triplet model using the MadGraph computer program. We have calculated the production cross sections of heavy particles using the experimental constraints in the parameter space ( $c_{H}$ , $c_{F}$ ) imposed on the benchmark scenario. The nature of the functional dependence of the cross section at the basic parameters of the model on the mass of the new boson, as well as the mechanism for the heavy particle production is studied.
hep-phProb.Atomic Sci.Technol.(2023)·0 citations
04*
Particle Interferometry in a Moat Regime
Fabian Rennecke🇩🇪 · Robert D. Pisarski🇺🇸 · Dirk H. Rischke🇩🇪
Dense strongly interacting matter can exhibit regimes with spatial modulations, akin to crystalline phases. In this case particles can have a moat spectrum with minimal energy at nonzero momentum. We show that particle interferometry is a sensitive probe of such a regime in heavy-ion collisions. To this end, we develop a field-theoretical formalism that relates particle spectra to in-medium real-time correlation functions of quantum fields on curved hypersurfaces of spacetime. This is then applied to the study of Bose-Einstein correlations in a moat regime in heavy-ion collisions. The resulting two-particle spectra exhibit peaks at nonzero average pair momentum, in contrast to the two-particle spectra in a normal phase, which peak at zero momentum. These peaks lead to non-trivial structures in the ratio of two-particle correlation functions, which should be experimentally measurable if the resolution in the direction of average pair momentum is sufficiently large. We propose these structures in the correlation-function ratios as clear signature of a moat regime and spatially modulated phases in quantum chromodynamics (QCD).
hep-phnucl-exnucl-thPRD(2023)·38 citations
05*
Unpolarized transverse-momentum dependent distribution functions of a quark in a pion with Minkowskian dynamics
E. Ydrefors (IMP-Lanzhou) · W. de Paula (ITA - S. José dos Campos) · T. Frederico (ITA - S. José dos Campos) · G. Salmè (INFN - Rome)
The unpolarized twist-2 (leading) and twist-3 (subleading), T-even, transverse-momentum dependent quark distributions in the pion are evaluated for the first time by using the actual solution of a dynamical equation in Minkowski space. The adopted theoretical framework is based on the homogeneous Bethe-Salpeter integral equation with an interaction kernel given by a one-gluon exchange, featuring an extended quark-gluon vertex. The masses of quark and gluon as well as the interaction-vertex scale have been chosen in a range suggested by lattice-QCD calculations, and calibrated to reproduce both pion mass and decay constant. The sum rules to be fulfilled by the transverse-momentum dependent distributions are carefully investigated, particularly the leading-twist one, that has to match the collinear parton distribution function, and hence can be scrutinized in terms of existing data as well as theoretical predictions. Noteworthy, the joint use of the Fock expansion of the pion state facilitates a more in-depth analysis of the content of the pion Bethe-Salpeter amplitude, allowing for the first time to determine the gluon contribution to the quark average longitudinal fraction, that results to be $\sim 6%$ . The current analysis highlights the role of the gluon exchanges through quantitative analysis of collinear and transverse-momentum distributions, showing, e.g. for both leading and subleading-twists, an early departure from the widely adopted exponential fall-off, for $∣ k_{⊥} ∣^{2} > m^{2}$ , with the quark mass $\sim Λ_{QC D}$ .
hep-phEPJC(2023)·15 citations
06*
Quantum information entropy of heavy mesons in the presence of a point-like defect
C. A. S. Almeida🇧🇷 · C. O. Edet🇲🇾 · F. C. E. Lima🇧🇷 · N. Ali🇲🇾 · M. Asjad🇦🇪
Using Schrödinger's formalism, we investigate the quantum eigenstates of the heavy mesons trapped by a point-like defect and by Cornell's potential. One implements this defect to the model considering a spherical metric profile coupled to it. Furthermore, the Nikiforov-Uvarov method is applied to theory to study the quantum eigenstates of the heavy mesons. To calculate the quantum information entropy (QIE), one considers the wave functions that describe the charmonium and bottomonium states. To explore the QIE, we use the well-known Shannon's entropy formulated at the position and reciprocal space. The analysis of the QIE gives us relevant information about how the quantum information change with the variation of the point-like defect. Consequently, considering the Bialynicki-Birula and Mycielski (BBM) relation, we show how this defect influences the quarkonium position and momentum uncertainty measures.
hep-phquant-phResults Phys.(2023)·8 citations
07*
Thermal curvature perturbations in thermal inflation
Mar Bastero-Gil🇪🇸 · Joaquim M. Gomes🇬🇧 · João G. Rosa🇵🇹
We compute the power spectrum of super-horizon curvature perturbations generated during a late period of thermal inflation, taking into account fluctuation-dissipation effects resulting from the scalar flaton field's interactions with the ambient radiation bath. We find that, at the onset of thermal inflation, the flaton field may reach an equilibrium with the radiation bath even for relatively small coupling constants, maintaining a spectrum of thermal fluctuations until the critical temperature $T_{c}$ , below which thermal effects stop holding the field at the false potential minimum. This enhances the field variance compared to purely quantum fluctuations, therefore increasing the average energy density during thermal inflation and damping the induced curvature perturbations. In particular, we find that this inhibits the later formation of primordial black holes, at least on scales that leave the horizon for $T > T_{c}$ . The larger thermal field variance also reduces the duration of a period of fast-roll inflation below $T_{c}$ , as the field rolls to the true potential minimum, which should also affect the generation of (large) curvature perturbations on even smaller scales.
hep-phastro-ph.COgr-qcJCAP(2024)·7 citations
08*
Jet-veto resummation at N $^{3}$ LL $_{p}$ +NNLO in boson production processes
John M. Campbell🇺🇸 · R. Keith Ellis🇬🇧 · Tobias Neumann🇺🇸 · Satyajit Seth🇮🇳
Vetoing energetic jet activity is a crucial tool for suppressing backgrounds and enabling new physics searches at the LHC, but the introduction of a veto scale can introduce large logarithms that may need to be resummed. We present an implementation of jet-veto resummation for color-singlet processes at the level of N $^{3}$ LL $_{p}$ matched to fixed-order NNLO predictions. Our public code MCFM allows for predictions of a single boson, such as $Z / γ^{*}$ , $W^{\pm}$ or $H$ , or with a pair of vector bosons, such as $W^{+} W^{-}$ , $W^{\pm} Z$ or $Z Z$ . The implementation relies on recent calculations of the soft and beam functions in the presence of a jet veto over all rapidities, with jets defined using a sequential recombination algorithm with jet radius $R$ . However one of the ingredients that is required to reach full N $^{3}$ LL accuracy is only known approximately, hence N $^{3}$ LL $_{p}$ . We describe in detail our formalism and compare with previous public codes that operate at the level of NNLL. Our higher-order predictions improve significantly upon NNLL calculations by reducing theoretical uncertainties. We demonstrate this by comparing our predictions with ATLAS and CMS results.
hep-phJHEP(2023)·19 citations
09*
Soft-parton contributions to heavy-quark production at low transverse momentum
Stefano Catani🇮🇹 · Simone Devoto🇮🇹 · Massimiliano Grazzini🇨🇭 · Javier Mazzitelli🇨🇭
We consider QCD radiative corrections to the production of a heavy-quark pair in hadronic collisions. We present the computation of the soft-parton contributions at low transverse momentum of the heavy-quark pair up to second order in the QCD coupling $α_{s}$ . These results complete the evaluation at the next-to-next-to-leading order (NNLO) of the transverse-momentum resummation formula for this process. Moreover, they give all the ingredients that are needed for the NNLO implementation of the qT subtraction formalism for heavy-quark production. We discuss the details of the computation and we provide a code that can be used to obtain the relevant results in numerical form.
hep-phJHEP(2023)·31 citations
10*
Neutrinos from dense environments : Flavor mechanisms, theoretical approaches, observations, and new directions
M. Cristina Volpe🇫🇷
Neutrino masses and mixings produce vacuum oscillations, an established quantum mechanical phenomenon. In matter, the Mikheev-Smirnov-Wolfenstein effect, due to neutrino interactions with the background particles, triggers resonant flavor modification. In dense environments, such as core-collapse supernovae or compact mergers, sizable neutrino-neutrino interactions, shock waves and turbulence impact the neutrino flavor content under a variety of phenomena. Theoretical approaches of neutrino propagation range from the mean-field approximation to the full quantum kinetic equations. Intriguing connections have been uncovered between weakly interacting dense neutrino gases and other many-body systems and domains, from condensed matter and nuclear physics to quantum computing. Besides the intrinsic theoretical interest, establishing how neutrinos change flavor contributes to answer the longstanding open questions of how massive stars explode and of the r-process sites. It is also important for future observations of core-collapse supernova neutrinos and of the diffuse supernova neutrino background that should be discovered in the foreseeable future.
hep-phastro-ph.SRhep-exnucl-thRMP(2024)·159 citations
11*
Boltzmann equation and its cosmological applications
Seishi Enomoto🇨🇳 · Yu-Hang Su🇨🇳 · Man-Zhu Zheng🇨🇳 · Hong-Hao Zhang🇨🇳
We review the derivation of the Boltzmann equation and its cosmological applications in this paper. The derivation of the Boltzmann equation, especially the collision term, is discussed in detail in the language of the quantum field theory without any assumption of the finite temperature system. We also discuss the integrated Boltzmann equation with the deal of the temperature parameter as an extension of the standard equation. Among a number of its cosmological applications, we mainly target two familiar examples, the dynamics of the dark matter abundance through the freeze-out/in process and a baryogenesis scenario. The formulations in those systems are briefly discussed with techniques in their calculations.
hep-phSymmetry(2025)·6 citations
12*
Precision phenomenology with fiducial cross sections in the triple-differential Drell-Yan process
A. Gehrmann-De Ridder🇨🇭 · T. Gehrmann🇨🇭 · E. W. N. Glover🇬🇧 · A. Huss🇨🇭 · C. T. Preuss🇨🇭 · D. M. Walker🇬🇧
The production of lepton pairs (Drell-Yan process) at the LHC is being measured to high precision, enabling the extraction of distributions that are triply differential in the di-lepton mass and rapidity as well as in the scattering angle described by the leptons. The measurements are performed for a fiducial phase space, defined by cuts on the individual lepton momenta and rapidities. Based on the ATLAS triple-differential Drell-Yan measurement at 8~TeV, we perform a detailed investigation of the phenomenology of this process based on state-of-the-art perturbative predictions in QCD and the electroweak theory. Our results demonstrate the highly non-trivial interplay between measurement variables and fiducial cuts, which leads to forbidden regions at Born level, and induces sensitivity on extra particle emissions from higher perturbative orders. We also investigate the sensitivity of the measurement on parton distributions and electroweak parameters. We derive Standard-Model theory predictions which combine NNLO QCD and NLO EW corrections and include partial N $^{3}$ LO QCD as well as higher-order EW corrections where appropriate. Our results will enable the use of the triple-differential Drell-Yan data in a precise experimental determination of the weak mixing angle.
hep-phhep-exJHEP(2023)·10 citations
13*
Refining the GENEVA method for Higgs boson production via gluon fusion
Simone Alioli🇮🇹 · Georgios Billis🇮🇹 · Alessandro Broggio🇮🇹 · Alessandro Gavardi🇮🇹 · Stefan Kallweit🇮🇹 · Matthew A. Lim🇩🇪 · Giulia Marinelli🇮🇹 · Riccardo Nagar🇮🇹 · Davide Napoletano🇮🇹
We describe a number of improvements to the GENEVA method for matching NNLO calculations to parton shower programs. In particular, we detail changes to the resummed calculation used in the matching procedure, including disentangling the cross section dependence on factorisation and beam scales, and an improved treatment of timelike logarithms. We also discuss modifications in the implementation of the splitting functions which serve to make the resummed calculation differential in the higher multiplicity phase space. These changes improve the stability of the numerical cancellation of the nonsingular term at small values of the resolution parameter. As a case study, we consider the gluon-initiated Higgs boson production process $g g \to H$ . We validate the NNLO accuracy of our predictions against independent calculations, and compare our showered and hadronised results with recent data taken at the ATLAS and CMS experiments in the diphoton decay channel, finding good agreement.
hep-phhep-exJHEP(2023)·23 citations
14*
Electromagnetic Form Factors and Charge Radii of Pseudoscalar and Scalar Mesons: A Comprehensive Contact Interaction Analysis
R. J. Hernández-Pinto🇲🇽 · L. X. Gutiérrez-Guerrero🇲🇽 · A. Bashir🇲🇽 · M. A. Bedolla🇲🇽 · I. M. Higuera-Angulo🇲🇽
We carry out a comprehensive survey of electromagnetic form factors of all light, heavy and heavy-light ground-state pseudoscalar and scalar mesons. Our analysis is based upon a Schwinger-Dyson equations treatment of a vector $\times$ vector contact interaction. It incorporates confinement and ensures axial vector and vector Ward-Takahashi identities are satisfied along with the corresponding corollaries such as the Goldberger-Treiman relations. The algebraic simplicity of the model allows us to compute the form factors at arbitrarily large virtualities of the probing photon momentum squared with relative ease. Wherever possible and insightful, we compare our results for the electromagnetic form factors and the charge radii with those obtained earlier through Schwinger-Dyson equations, lattice and with experimental observations available. We also comment on the scope and shortcomings of the model.
hep-phnucl-thPRD(2023)·36 citations
15*
Right-handed neutrino pair production via second-generation leptoquarks
Arvind Bhaskar🇮🇳 · Yash Chaurasia🇮🇳 · Kuldeep Deka🇮🇳 · Tanumoy Mandal🇮🇳 · Subhadip Mitra🇮🇳 · Ananya Mukherjee🇮🇳
No direct experimental constraints exist on Leptoquark (LQ) couplings with quarks and right-handed neutrinos (RHNs). If a LQ dominantly couples to RHNs, it can leave unique signatures at the LHC. The RHNs can be produced copiously from LQ decays as long as they are lighter than the LQs. LQ-induced RHN production has never been searched for in experiments. This channel can act as a simultaneous probe for RHNs and LQs that dominantly couple to RHNs. In this paper, we consider all possible charge- $2/3$ and $1/3$ scalar and vector LQs that dominantly couple to second-generation quarks and RHN. We study the pair and single productions of TeV-scale LQs and their subsequent decay to sub-TeV RHNs, realised in the inverse seesaw framework. We also consider RHN pair production through a $t$ -channel LQ exchange. The single LQ production and $t$ -channel contributions can be significant for large LQ-RHN-quark couplings. We systematically combine events from these processes leading to a pair of RHNs plus jets to study the prospects of LQ-assisted RHN pair production. We analyse the monolepton and opposite-sign dilepton final states and estimate the discovery reach at the high-luminosity LHC.
hep-phhep-exPLB(2023)·19 citations
16*
A modular perspective to the jet suppression from a small to large radius in very high transverse momentum jets
Manaswini Priyadarshini🇮🇳 · Om Shahi🇮🇳 · Vaishnavi Sathe🇮🇳 · Prabhakar Palni🇮🇳
In this work, we expand the scope of the JETSCAPE framework to investigate the dependence of the jet nuclear modification factor, $R_{AA}$ , on the jet radius parameter ( $R$ ) for broader area jet cones, going all the way up to $R$ = 1.0. This study presents a comprehensive analysis of high- $p_{T}$ inclusive jets extending up to 1 TeV to probe the quark-gluon plasma medium at much shorter distance scales. It focuses on quenching effects observed in the quark-gluon plasma formed during Pb-Pb collisions at $s_{NN}$ = 5.02 TeV, particularly for the most-central (0-10\%) collisions. Jet-medium interactions represent a pivotal domain of both theoretical and experimental QGP studies, with various models offering different assumptions to describe these phenomena. To illustrate this modular approach, this work computes the nuclear modification factor for inclusive jets via coupling of the MATTER model (which simulates the high virtuality phase of the parton evolution) with the LBT model (which simulates the low virtuality phase of the parton evolution). Additionally, the two successful energy loss models: MARTINI and AdS/CFT are employed to characterize the jet-suppression effectively within the JETSCAPE framework. The results are compared with the experimental data from the ATLAS and CMS detectors, covering jet transverse momentum ( $p_{T}$ ) ranging from 100 GeV to 1 TeV for ATLAS and 300 GeV to 1 TeV for CMS. The predictions made by the JETSCAPE are consistent in the high $p_{T}$ range as well as for extreme jet cone sizes, showing deviation within 10-25\%. Our major focus is on calculating the double ratio ( $R_{AA}^{R} / R_{AA}^{R = small}$ ) as a function of jet-R and jet- $p_{T}$ , where the experimental results align well with predictions from the JETSCAPE framework.
hep-phnucl-thPRD(2025)·0 citations
17*
Understanding parton evolution in matter from renormalization group analysis
Weiyao Ke🇺🇸 · Ivan Vitev🇺🇸
We perform a renormalization group (RG) analysis of collinear hadron production in deep inelastic scattering on nuclei. We consider the limit where the parent parton energy $E$ is large, while the medium opacity $L / λ_{g}$ remains small. We identify the fixed order and leading $ln (E / ξ^{2} L)$ enhanced medium contributions to the semi-inclusive cross sections and derive RG equations that resum multiple emissions near the endpoints of the splitting functions at first order in opacity. These evolution equations treat the same type of radiation enhancement in matter as the modified Dokshitzer-Gribov-Lipatov-Altarelli-Parisi approach, but differ in the way one regulates the collinear divergences. They provide a unique analytic insight into the problem of resummation and a faster and more efficient path to phenomenology. The new RG evolution framework is applied to study fragmentation in $e$ A reactions.
hep-phnucl-thPLB(2024)·17 citations
18*
Soft Phonon Theorems
Clifford Cheung🇺🇸 · Maria Derda🇺🇸 · Andreas Helset🇺🇸 · Julio Parra-Martinez🇺🇸
A variety of condensed matter systems describe gapless modes that can be interpreted as Nambu-Goldstone bosons of spontaneously broken Poincaré symmetry. In this paper we derive new soft theorems constraining the tree-level scattering of these degrees of freedom, as exhibited in solids, fluids, superfluids, and framids. These soft theorems are in one-to-one correspondence with various broken symmetries, including spacetime translations, Lorentz boosts, and, for the case of fluids, volume-preserving diffeomorphisms. We also implement a bootstrap in which the enhanced vanishing of amplitudes in the soft limit is taken as an input, thus sculpting out a subclass of exceptional solid, fluid, and framid theories.
↳ hep-thcond-mat.otherhep-phJHEP(2023)·16 citations
19*
New Exclusion Limit for Dark Photons from an SRF Cavity-Based Search (Dark SRF)
A. Romanenko · R. Harnik · A. Grassellino · R. Pilipenko · Y. Pischalnikov · Z. Liu · O. S. Melnychuk · B. Giaccone · O. Pronitchev · T. Khabiboulline · D. Frolov · S. Posen · A. Berlin · A. Hook
We conduct the first ``light-shining-through-wall" (LSW) search for dark photons using two state-of-the-art high quality-factor superconducting radio frequency (SRF) cavities and report the results of its pathfinder run. Our new experimental setup enables improvements in sensitivity over previous searches and covers new dark photon parameter space. We design delicate calibration and measurement protocols to utilize the high- $Q$ setup at Dark SRF. Using cavities operating at $1.3 GHz$ , we establish a new exclusion limit for kinetic mixing as small as { $ϵ = 1.6 \times 1 0^{- 9}$ } and provide the world's best constraints on dark photons in the $2.1 \times 1 0^{- 7} eV - 5.7 \times 1 0^{- 6} eV$ mass range. Our result is the first proof-of-concept for the enabling role of SRF cavities in LSW setups, with ample opportunities for further improvements. In addition, our data sets a competitive lab-based limit on the Standard Model photon mass by searching for longitudinal photon polarization.
↳ hep-exhep-phphysics.acc-phPRL(2023)·73 citations
20*
Eigenvalues of the QCD Dirac matrix with improved staggered quarks in the continuum limit
Olaf Kaczmarek🇩🇪 · Ravi Shanker🇮🇳 · Sayantan Sharma🇮🇳
We calculate the eigenmodes of the Highly Improved Staggered Quark (HISQ) matrix near the chiral crossover transition in QCD with $2 + 1$ flavors with the aim to gain more insights into its temperature dependence. On performing the continuum extrapolation, we do not observe any gap opening up in the infrared part of the eigenvalue density of the QCD Dirac operator; instead we observe a peak. The existence of the peak and oscillations of the infrared eigenmodes can be understood in terms of an interacting ensemble of instantons. From the properties of the continuum extrapolated eigenspectrum we further show that the anomalous $U_{A} (1)$ part of the chiral symmetry is not effectively restored simultaneously along with its non-singlet counterpart. We provide an explanation for this observation, further showing interesting connections between the anomalous $U_{A} (1)$ restoration and the change in the infrared part of the eigenvalue distribution.
↳ hep-lathep-phnucl-thPRD(2023)·27 citations
21*
Non-Abelian Anyons and Non-Abelian Vortices in Topological Superconductors
Yusuke Masaki🇯🇵 · Takeshi Mizushima🇯🇵 · Muneto Nitta🇯🇵
Anyons are particles obeying statistics of neither bosons nor fermions. Non-Abelian anyons, whose exchanges are described by a non-Abelian group acting on a set of wave functions, are attracting a great attention because of possible applications to topological quantum computations. Braiding of non-Abelian anyons corresponds to quantum computations. The simplest non-Abelian anyons are Ising anyons which can be realized by Majorana fermions hosted by vortices or edges of topological superconductors, $ν = 5/2$ quantum Hall states, spin liquids, and dense quark matter. While Ising anyons are insufficient for universal quantum computations, Fibonacci anyons present in $ν = 12/5$ quantum Hall states can be used for universal quantum computations. Yang-Lee anyons are non-unitary counterparts of Fibonacci anyons. Another possibility of non-Abelian anyons (of bosonic origin) is given by vortex anyons, which are constructed from non-Abelian vortices supported by a non-Abelian first homotopy group, relevant for certain nematic liquid crystals, superfluid $^{3}$ He, spinor Bose-Einstein condensates, and high density quark matter. Finally, there is a unique system admitting two types of non-Abelian anyons, Majorana fermions (Ising anyons) and non-Abelian vortex anyons. That is $^{3} P_{2}$ superfluids (spin-triplet, $p$ -wave paring of neutrons), expected to exist in neutron star interiors as the largest topological quantum matter in our universe.
↳ cond-mat.supr-concond-mat.mes-hallhep-phhep-th+1in Encyclopedia of Condensed Matter Physi…·13 citations
22*
Study of ttbb and ttW background modelling for ttH analyses
Lars Ferencz (1)🇩🇪 · Kirill Grevtsov (1)🇩🇪 · Judith Katzy (1)🇩🇪 · Andrea Knue (2)🇩🇪 · Jan van der Linden (3)🇩🇪 · Josh McFayden (4)🇬🇧 · Gianna Moenig (4)🇬🇧 · Emanuel Pfeffer (3)🇩🇪 · Andrej Saibel (5)🇪🇸 · Matthias Schroeder (3)🇩🇪 · Joshuha Thomas-Wilsker (7) ((1) Deutsches Elektron Synchroton DESY Germany, (2) University at Freiburg Germany, (3) Karlsruhe Institut of Technology KIT Germany, (4) University of Sussex Great Britain, (5) Instituto de Física Corpuscular Consejo Superior de Investigaciones Científicas Spain, (6) University at Hamburg Germany, (7) Institute of High Energy Physics, Chinese Academy of Sciences, China)🇨🇳
This note presents Monte Carlo generator comparisons of the ttbb and ttW processes at particle level. The aim is to compare the modelling of important backgrounds to ttH measurements in multi-lepton final states and in the ttH(H->bb) decay channel and the treatment of the associated theory uncertainties for a combination of the full Run-2 ttH results from ATLAS and CMS. As a first step, modelling and theory uncertainties as used in ATLAS an CMS are compared in the relevant analysis regions. Significant differences in the treatment of systematic uncertainties between the experiments have been observed in ttbb and ttW. As a first step, ATLAS and CMS agreed on a common reference value of the inclusive ttW cross section to allow direct comparisons between experiments.
↳ hep-exhep-ph20 citations
23*
Criticality of quantum energy teleportation at phase transition points in quantum field theory
Kazuki Ikeda🇺🇸
Quantum field theory can be a new medium for communication through quantum energy teleportation. We performed a demonstration of quantum energy teleportation with a relativistic fermionic field theory of self-coupled fermions, called the massive Thirring model. Our results reveal that there is a close relation between the amount of energy teleported and the phase diagram of the theory. In particular, it is shown that the teleported energy peaks near the phase transition points. The results provide new implications for phase diagrams of field theory in terms of quantum communication and quantum computing.
↳ hep-thcond-mat.stat-mechhep-lathep-ph+1PRD(2023)·32 citations
24*
Higgs Inflation: constraining the top quark mass and breaking the $H_{0}$ - $σ_{8}$ correlation
Jamerson G. Rodrigues🇧🇷 · Micol Benetti🇮🇹 · Rayff de Souza🇧🇷 · Jailson Alcaniz🇧🇷
Extending previous results [JHEP 11 (2021) 091], we explore aspects of the reheating mechanism for non-minimal Higgs inflation in the strong coupling regime. We constrain the radiative corrections for the inflaton's potential by considering the Coleman-Weinberg approximation and use the Renormalization Group Equations for the Higgs field to derive an upper limit on the quark top mass, $m_{t}$ . Using the current Cosmic Microwave Background, Baryon Acoustic Oscillation, and Supernova data, we obtain $m_{t} \leq 170.44$ GeV, confirming the observational compatibility of the model with recent $m_{t}$ estimates reported by the CMS collaboration. We also analyze the breakdown of the well-known correlation involving the Hubble constant $H_{0}$ and the clustering parameter $σ_{8}$ , which makes the model interesting in light of the cosmological tensions discussed over the last decade.
↳ astro-ph.COgr-qchep-phPLB(2024)·7 citations
25*
Schwinger-Dyson equation in the complex plane -- Two simple models --
Hidekazu Tanaka🇯🇵 · Shuji Sasagawa🇯🇵
Effective mass and energy are investigated using the Schwinger-Dyson equation (SDE) in the complex plane. As simple examples, we solve the SDE for the (1+1)-dimensional model and the strongly coupled quantum electrodynamics (QED). We also study some properties of the effective mass and energy in the complex plane.
↳ hep-thhep-phPTEP(2023)·1 citation
26*
Next-generation multi-fluid hydrodynamic model for RHIC BES
Jakub Cimerman🇨🇿 · Iurii Karpenko🇨🇿 · Boris Tomasik🇨🇿 · Pasi Huovinen🇵🇱
We have developed a next-generation hybrid event-by-event three-fluid hydrodynamic model, suitable for simulations of heavy-ion collisions in the energy range from few up to tens of GeV per colliding NN pair. At such energies the interpenetration time of the nuclei is of the same order as the lifetime of the system, however this model treats the initial phase hydrodynamically. Thanks to that it is more sensitive to the Equation of State than 1-fluid models with initial states being parametrised or generated by transport approach. Hence, our model is well designed for simulations at collision energies, at which matter in vicinity of the QCD critical endpoint is expected. The construction of the model is explained and basic observables like hadron spectra in rapidity and transverse momentum, as well as elliptic flow are calculated.
↳ nucl-thhep-phPRC(2023)·30 citations
27*
Fast Neutrino Flavor Conversion in Core-Collapse Supernovae: A Parametric Study in 1D Models
Jakob Ehring (1,2,3)🇩🇪 · Sajad Abbar (1)🇩🇪 · Hans-Thomas Janka (2)🇩🇪 · Georg Raffelt (1)🇩🇪 · Irene Tamborra (4) ((1) MPI Physik, (2) MPI Astrophysik, (3) TUM Garching, (4) Niels Bohr Institute)🇩🇰
We explore the impact of small-scale flavor conversions of neutrinos, the so-called fast flavor conversions (FFCs), on the dynamical evolution and neutrino emission of core-collapse supernovae (CCSNe). In order to do that, we implement FFCs in the spherically symmetric (1D) CCSN simulations of a 20 solar-mass progenitor model parametrically, assuming that FFCs happen at densities lower than a systematically varied threshold value and lead to an immediate flavor equilibrium consistent with lepton number conservation. We find that besides hardening the electron neutrino and antineutrino spectra, which helps the expansion of the shock by enhanced postshock heating, FFCs can cause significant, nontrivial modifications of the energy transport in the SN environment via increasing the heavy-lepton neutrino luminosities. In our non-exploding models this results in extra cooling of the layers around the neutrinospheres, which triggers a faster contraction of the proto-neutron star and hence, in our 1D models, hampers the CCSN explosion. Although our study is limited by the 1D nature of our simulations, it provides valuable insights into how neutrino flavor conversions in the deepest CCSN regions can impact the neutrino release and the corresponding response of the stellar medium.
↳ astro-ph.HEgr-qchep-phnucl-thPRD(2023)·107 citations
28*
Motion of an electron through vacuum fluctuations
Anirudh Gundhi · Angelo Bassi🇮🇹
We study the effects of the electromagnetic vacuum on the motion of a nonrelativistic electron. First, we derive the equation of motion for the expectation value of the electron's position operator. We show how this equation has the same form as the classical Abraham-Lorentz equation but, at the same time, is free of the well known runaway solution. Second, we study decoherence induced by vacuum fluctuations. We show that decoherence due to vacuum fluctuations that appears at the level of the reduced density matrix of the electron, obtained after tracing over the radiation field, does not correspond to actual irreversible loss of coherence.
↳ quant-phgr-qchep-phhep-thPRA(2023)·7 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.