HEP Phenomenology·hep-ph

Fri·Oct 7, 2022Friday·October 7, 2022

21 papers—18 primary·3 cross-listed·reconstructed*

01*
Factorization at subleading power in deep inelastic scattering in the $x \to 1$ limit
Michael Luke🇨🇦 · Jyotirmoy Roy🇨🇦 · Aris Spourdalakis🇨🇦
We examine the endpoint region of inclusive deep inelastic scattering at next-to-leading power (NLP). Using a soft-collinear effective theory approach with no explicit soft or collinear modes, we discuss the factorization of the cross section at NLP and show that the overlap subtraction procedure introduced to eliminate double counting of degrees of freedom at leading power ensures that spurious endpoint divergences in the rate cancel at NLP at one loop. For this cancellation to occur at all renormalization scales a nontrivial relation between the anomalous dimensions of the leading and subleading operators is required, which is demonstrated to hold at one loop.
hep-phPRD(2023)·5 citations
02*
TF07 Snowmass Report: Theory of Collider Phenomena
Fabio Maltoni · Shufang Su · Jesse Thaler
Theoretical research has long played an essential role in interpreting data from high-energy particle colliders and motivating new accelerators to advance the energy and precision frontiers. Collider phenomenology is an essential interface between theoretical models and experimental observations, since theoretical studies inspire experimental analyses while experimental results sharpen theoretical ideas. This report -- from the Snowmass 2021 Theory Frontier topical group for Collider Phenomenology (TF07) -- showcases the dynamism, engagement, and motivations of collider phenomenologists by exposing selected exciting new directions and establishing key connections between cutting-edge theoretical advances and current and future experimental opportunities. By investing in collider phenomenology, the high-energy physics community can help ensure that theoretical advances are translated into concrete tools that enable and enhance current and future experiments, and in turn, experimental results feed into a more complete theoretical understanding and motivate new questions and explorations.
hep-phhep-ex23 citations
03*
Quark confinement in QCD in the 't Hooft limit
Marco Frasca🇮🇹 · Anish Ghoshal🇵🇱 · Stefan Groote🇪🇪
We treat quantum chromodynamics (QCD) using a set of Dyson-Schwinger equations derived, in differential form, with the Bender-Milton-Savage technique. In this way, we are able to derive the low energy limit that assumes the form of a non-local Nambu-Jona-Lasinio model. The corresponding gap equation is then studied to show that such a model has no free quarks in the low-energy limit.
hep-phhep-thNucl.Part.Phys.Proc.(2023)·7 citations
04*
Assisted baryon number violation from $4 k + 2$ dimensions
Akshay A🇮🇳 · Mathew Thomas Arun🇮🇳
Proton decay in six dimensions orbifolded on square $T^{2} / Z_{2}$ is highly suppressed at tree-level. This is because baryon number violating (BNV) operators containing only the zero mode of bulk fermions must satisfy the selection rule $\frac{3}{2} Δ B \pm \frac{1}{2} Δ L = 0 m o d 4$ . In this article, we show that the above relation does not prohibit mass dimension-6 BNV operators containing Kaluza Klein (KK) partners of the bulk fermions. Together with `spinless' adjoint scalar partner of hypercharge gauge boson (the Dark Matter candidate), these novel operators generate Dark Matter assisted proton decay at mass dimension-8. Here, with explicit examples of scalar and vector baryon number violating interactions, we discuss the importance of such $Δ B = 1 = Δ L$ and $Δ B = 2 = Δ L$ operators and derive the limit on New Physics.
hep-phastro-ph.COhep-thPRD(2024)·1 citation
05*
Double strangeness molecular-type pentaquarks from coupled channel dynamics
J.A. Marsé-Valera🇪🇸 · V.K. Magas🇪🇸 · A. Ramos🇪🇸
The existence of pentaquarks with strangeness content zero and one are major discoveries of the latest years in hadron physics. Most of these states can be understood as hadronic molecules and were predicted prior to their discovery within a model based on unitarized meson-baryon amplitudes obtained from vector meson exchange interactions. Contrary to earlier statements, we show this model to also predict the existence of pentaquarks with double strangeness, at about 4500 MeV and 4600 MeV, which are generated in a very specific and unique mechanism, via an attraction induced by a strong coupling between the two heaviest meson-baryon states.
hep-phPRL(2023)·26 citations
06*
Black Hole Evaporation Beyond the Standard Model of Particle Physics
Michael J. Baker🇦🇺 · Andrea Thamm🇦🇺
The observation of an evaporating black hole would provide definitive information on the elementary particles present in nature. In particular, it could discover or exclude particles beyond those present in the standard model of particle physics. We consider a wide range of motivated scenarios beyond the standard model and identify those which would be best probed in the event of an observation. For those models we define representative benchmark parameters and characterise the photon spectra as a function of time. For the supersymmetric benchmark model, where most of the new particles produce secondary photons, we provide secondary spectra and discuss the subtle interplay between faster black hole evaporation and an increased flux of secondary photons. Finally, we discuss the impact of these models on future experimental analysis strategies.
hep-phJHEP(2023)·35 citations
07*
Exploring the electromagnetic properties of the $Ξ_{c}^{(', *)} D ˉ_{s}^{*}$ and $Ω_{c}^{(*)} D ˉ_{s}^{*}$ molecular states
Fu-Lai Wang🇨🇳 · Si-Qiang Luo🇨🇳 · Hong-Yan Zhou🇨🇳 · Zhan-Wei Liu🇨🇳 · Xiang Liu🇨🇳
This paper presents a systematic investigation of the electromagnetic properties of the hidden-charm molecular pentaquarks within the constituent quark model. Specifically, it focuses on two types of pentaquarks: the $Ξ_{c}^{(', *)} D ˉ_{s}^{*}$ -type pentaquarks with double strangeness and the $Ω_{c}^{(*)} D ˉ_{s}^{*}$ -type pentaquarks with triple strangeness. The study explores various electromagnetic properties, including the magnetic moments, the transition magnetic moments, and the radiative decay behavior of these pentaquarks. To ensure realistic calculations, the $S$ - $D$ wave mixing effect and the coupled channel effect are taken into account. By examining the electromagnetic properties of the hidden-charm molecular pentaquarks with double and triple strangeness, this research contributes to the deeper understanding of their spectroscopic behavior. These findings form a valuable addition to the ongoing investigation into the broader spectrum of properties exhibited by the hidden-charm molecular pentaquarks.
hep-phhep-exPRD(2023)·37 citations
08*
Illuminating the charged leptons in the proton
Victor P. Goncalves🇧🇷 · Daniel E. Martins🇧🇷
The description of the structure of proton is fundamental in order to describe the standard model processes at the LHC as well as for the searching of New Physics. Quantum fluctuations imply the presence of photons and leptons inside the proton, which admit a parton distribution function (PDF). Although the lepton PDFs are expected to be small, its presence opens new production mechanisms. In order to explore the lepton - induced processes at the LHC, a precise determination of the leptonic content of the proton is needed. In this paper we propose to constrain the content of charged leptons inside the proton through the study of the QED Compton scattering in ultraperipheral proton - nucleus collisions at the LHC. We estimate the total cross sections and associated distributions considering different models for the lepton PDFs and distinct lepton flavours. We demonstrate that a future experimental analysis of this process is feasible and that it can be used to constrain the content of electrons, muons and taus inside the proton.
hep-phhep-exPRD(2023)·2 citations
09*
Unintegrated gluon distributions from the color dipole cross section in the BGK saturation model
Agnieszka Łuszczak🇵🇱 · Marta Łuszczak🇵🇱 · Wolfgang Schäfer🇵🇱
We evaluate the unintegrated gluon distribution of the proton starting from a parametrization of the color dipole cross section including DGLAP evolution and saturation effects. To this end, we perform the Fourier-Bessel transform of $σ (x, r) / α (r)$ . At large transverse momentum of gluons we match the so-obtained distribution to the logarithmic derivative of the collinear gluon distribution. We check our approach by calculating the proton structure function $F_{L} (x, Q^{2})$ finding good agreement with HERA data.
hep-phPLB(2022)·28 citations
10*
Pion and nucleon relativistic electromagnetic four-current distributions
Yi Chen🇨🇳 · Cédric Lorcé🇫🇷
The quantum phase-space approach allows one to define relativistic spatial distributions inside a target with arbitrary spin and arbitrary average momentum. We apply this quasiprobabilistic formalism to the whole electromagnetic four-current operator in the case of spin- $0$ and spin- $\frac{1}{2}$ targets, study in detail the frame dependence of the corresponding spatial distributions, and compare our results with those from the light-front formalism. While former works focused on the charge distributions, we extend here the investigations to the current distributions. We clarify the role played by the Wigner rotation and argue that electromagnetic properties are most naturally understood in terms of Sachs form factors, contrary to what the light-front formalism previously suggested. Finally, we illustrate our results using the pion and nucleon electromagnetic form factors extracted from experimental data.
hep-phPRD(2022)·33 citations
11*
Fluctuations in heavy ion collisions and global conservation effects
Roman V. Poberezhnyuk🇺🇦 · Volodymyr Vovchenko🇩🇪 · Oleh Savchuk🇺🇦 · Volker Koch🇺🇸 · Mark I. Gorenstein🇺🇦 · Horst Stoecker🇩🇪
Subensemble is a type of statistical ensemble which is the generalization of grand canonical and canonical ensembles. The subensemble acceptance method (SAM) provides general formulas to correct the cumulants of distributions in heavy-ion collisions for the global conservation of all QCD charges. The method is applicable for an arbitrary equation of state and sufficiently large systems, such as those created in central collisions of heavy ions. The new fluctuation measures insensitive to global conservation effects are presented. The main results are illustrated in the hadron resonance gas and van der Waals fluid frameworks.
hep-phphysics.data-anEPJ Web Conf.(2023)·2 citations
12*
New features in the differential cross sections measured at the LHC
O.V. Selyugin🇷🇺
The critical analysis of the new experimental data obtained by the ATLAS Collaboration group at 13 TeV is presented and the problem of the tension between data of the ATLAS and TOTEM Collaboration is considered. The analysis of new effects discovered on the basis of experimental data at 13 TeV \cite{osc13,fd13} and associated with the specific properties of the hadron potential at large distances is carried out taking account of all sets of experimental data on elastic $pp$ -scattering obtained by the TOTEM and ATLAS Collaborations in a wide momentum transfer region. It also gives quantitative descriptions of all examined experimental data with a minimum of fitting parameters. It is shown that the new features determined at a high statistical level give an important contribution to the differential cross sections and allow the research into hadron interactions at large distances.
hep-phhep-exSymmetry(2023)·7 citations
13*
Decay constant of $B_{c}^{*}$ accurate up to $O (α_{s}^{3})$
Wen-Long Sang (SWU, Chongqing)🇨🇳 · Hong-Fei Zhang (GUFE, Guiyang)🇨🇳 · Ming-Zhen Zhou (SWU, Chongqing)🇨🇳
In this paper, we evaluate, up to QCD next-to-next-to-next-to-leading order, the $B_{c}^{*}$ decay constant, which, within the nonrelativistic QCD (NRQCD) framework, is factorized as the product of the short-distance coefficient (SDC) and the long-distance matrix element. For the first time, the renormalization constant and the anomalous dimension for the NRQCD vector current composed of $c b ˉ$ , which are functions of the charm quark mass $m_{c}$ , the bottom quark mass $m_{b}$ and the factorization scale $μ_{Λ}$ , are obtained analytically at $O (α_{s}^{2})$ and $O (α_{s}^{3})$ . The SDC is calculated up to $O (α_{s}^{3})$ in perturbative expansion. Explicitly, the $O (α_{s}^{2})$ correction to the SDC is analytically calculated in terms of logarithmic and polylogarithmic functions of $r \equiv m_{b} / m_{c}$ , and the $O (α_{s}^{3})$ correction to the SDC is numerically calculated at a series of values of $r$ , ranging from $2.1$ to $4.0$ . Surprisingly, we find that the nontrivial part of the SDC at $O (α_{s}^{3})$ can be well estimated by a linear function of $r$ . In addition, We find that the $O (α_{s}^{2})$ and $O (α_{s}^{3})$ corrections to the decay constant and decay width are considerable and very significant, which indicates a very poor convergence for the perturbative expansion.
hep-phPLB(2023)·9 citations
14*
Studying chirality imbalance with quantum algorithms
Alexander M. Czajka🇺🇸 · Zhong-Bo Kang🇺🇸 · Yuxuan Tee🇺🇸 · Fanyi Zhao🇺🇸
To describe the chiral magnetic effect, the chiral chemical potential $μ_{5}$ is introduced to imitate the impact of topological charge changing transitions in the quark-gluon plasma under the influence of an external magnetic field. We employ the (1+1) dimensional Nambu-Jona-Lasinio (NJL) model to study the chiral phase structure and chirality charge density of strongly interacting matter with finite chiral chemical potential $μ_{5}$ in a quantum simulator. By performing the Quantum imaginary time evolution (QITE) algorithm, we simulate the (1+1) dimensional NJL model on the lattice at various temperature $T$ and chemical potentials $μ$ , $μ_{5}$ and find that the quantum simulations are in good agreement with analytical calculations as well as exact diagonalization of the lattice Hamiltonian.
hep-phhep-exhep-latnucl-th+17 citations
15*
TF08 Snowmass Report: BSM Model Building
Patrick J. Fox🇺🇸 · Graham D. Kribs🇺🇸 · Hitoshi Murayama🇺🇸 · Amin Aboubrahim🇩🇪 · Prateek Agrawal🇬🇧 · Wolfgang Altmannshofer🇺🇸 · Howard Baer🇺🇸 · Avik Banerjee🇸🇪 · Vernon Barger🇺🇸 · Brian Batell🇺🇸 · Kim V. Berghaus🇺🇸 · Asher Berlin🇺🇸 and 44 other authors
We summarize the state of Beyond the Standard Model (BSM) model building in particle physics for Snowmass 2021, focusing mainly on several whitepaper contributions to BSM model building (TF08) and closely related areas.
hep-ph16 citations
16*
Estimation of the diffusion coefficient of Heavy Quarks in light of Gribov-Zwanziger action
Sadaf Madni🇮🇳 · Arghya Mukherjee🇨🇦 · Aritra Bandyopadhyay🇩🇪 · Najmul Haque🇮🇳
The heavy quark momentum diffusion coefficient ( $κ$ ) is one of the most essential ingredients for the Langevin description of heavy quark dynamics. In the temperature regime relevant to the heavy ion collision phenomenology, a substantial difference exists between the lattice estimations of $κ$ and the corresponding leading order (LO) result from the hard thermal loop (HTL) perturbation theory. Moreover, the indication of poor convergence in the next-to-leading order (NLO) perturbative analysis has motivated the development of several approaches to incorporate the non-perturbative effects in the heavy quark phenomenology. In this work, we estimate the heavy quark diffusion coefficient based on the Gribov-Zwanziger prescription. In this framework, the gluon propagator depends on the temperature-dependent Gribov mass parameter, which has been obtained self-consistently from the one-loop gap equation. Incorporating this modified gluon propagator in the analysis, we find a reasonable agreement with the existing lattice estimations of $κ$ within the model uncertainties.
hep-phPLB(2023)·17 citations
17*
Jump Starting the Dark Sector with a Phase Transition
Michele Redi🇮🇹 · Andrea Tesi🇮🇹
We study the possibility to populate the dark sector through a phase transition. We will consider secluded dark sectors made of gauge theories, Randall-Sundrum scenarios and conformally coupled elementary particles. These sectors have in common the fact that the action is approximately Weyl invariant, implying that particle production due to time dependent background is strongly suppressed. In particular no significant production takes place during inflation allowing to avoid strong isocurvature constraints from CMB. As we will show, if the scale of inflation is large compared to the dynamical mass scale, these sectors automatically undergo a phase transition that in the simplest cases is controlled by the Hubble parameter. If the phase transition takes place during reheating or radiation the abundance obtained can be larger than particle production and production from the SM plasma. For phase transitions completing during radiation domination, the DM mass is predicted in the range $1 0^{8}$ GeV while larger values are required for phase transitions occurring during reheating.
hep-phJHEP(2023)·7 citations
18*
Boosting Asymmetric Charged DM via Thermalization
Michael Geller🇮🇱 · Zamir Heller-Algazi🇮🇱
We consider a dark sector scenario with two dark matter species with opposite dark $U (1)$ charges and an asymmetric population comprising some fraction of the dark matter abundance. A new mechanism for boosting dark matter is introduced, arising from the large mass hierarchy between the two particles. In the galaxy, the two species thermalize efficiently through dark Rutherford scattering greatly boosting the lighter dark matter particle, far above the virial and escape velocities in the galaxy, while the dark charge prevents it from escaping. We study the consequences of this scenario for direct-detection experiments, assuming a kinetic mixing between the dark photon and the photon. If the charged dark sector makes up 5% of the total DM mass in our galaxy and the mass ratio is between $1 0^{3} - 1 0^{4}$ , we find that current and future experiments may probe the boosted light dark matter for masses down to 100 keV, in a hitherto unexplored parameter range.
hep-phJHEP(2023)·6 citations
19*
Higher derivative corrections to black brane thermodynamics and the weak gravity conjecture
Toshifumi Noumi🇯🇵 · Hibiki Satake🇯🇵
We study higher derivative corrections to black brane thermodynamics and their implications for the weak gravity conjecture for $p$ -form gauge fields. In particular we show that higher derivative corrections decrease tension-to-charge ratios of extremal black branes as implied by the weak gravity conjecture, if four-derivative couplings follow scattering positivity bounds. We also demonstrate that entropy corrections in the micro canonical ensemble are positive under the same assumptions. This extends earlier works in the Einstein-Maxwell theory to $p$ -form gauge fields in general spacetime dimensions.
↳ hep-thgr-qchep-phJHEP(2022)·25 citations
20*
Quantum computation of dynamical quantum phase transitions and entanglement tomography in a lattice gauge theory
Niklas Mueller🇺🇸 · Joseph A. Carolan🇺🇸 · Andrew Connelly🇺🇸 · Zohreh Davoudi🇺🇸 · Eugene F. Dumitrescu🇺🇸 · Kübra Yeter-Aydeniz🇺🇸
Strongly-coupled gauge theories far from equilibrium may exhibit unique features that could illuminate the physics of the early universe and of hadron and ion colliders. Studying real-time phenomena has proven challenging with classical-simulation methods, but is a natural application of quantum simulation. To demonstrate this prospect, we quantum compute non-equal time correlation functions and perform entanglement tomography of non-equilibrium states of a simple lattice gauge theory, the Schwinger model, using a trapped-ion quantum computer by IonQ Inc. As an ideal target for near-term devices, a recently-predicted [Zache et al., Phys. Rev. Lett. 122, 050403 (2019)] dynamical quantum phase transition in this model is studied by preparing, quenching, and tracking the subsequent non-equilibrium dynamics in three ways: i) overlap echos signaling dynamical transitions, ii) non-equal time correlation functions with an underlying topological nature, and iii) the entanglement structure of non-equilibrium states, including entanglement Hamiltonians. These results constitute the first observation of a dynamical quantum phase transition in a lattice gauge theory on a quantum computer, and are a first step toward investigating topological phenomena in nuclear and high-energy physics using quantum technologies.
↳ quant-phhep-lathep-phnucl-thPRX Quantum(2023)·97 citations
21*
Snowmass Topical Summary: Formal QFT
David Poland🇺🇸 · Leonardo Rastelli🇺🇸
We attempt to give a broad conceptual overview of modern quantum field theory, highlighting important recent developments. This report serves as the TF03 topical group summary for Snowmass 2021.
↳ hep-thcond-mat.stat-mechhep-lathep-ph+29 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.