Thu·Dec 15, 2022Thursday·December 15, 2022

1. 01*

   Constraining Non-minimal Dark Sector Scenarios with the COHERENT Neutrino Scattering Data

   A. Elpe🇹🇷 · E. Akyumuk🇹🇷 · T.M. Aliev (METU, Ankara)🇹🇷 · L. Selbuz (Ankara U., Ankara)🇹🇷 · I. Turan (METU, Ankara)🇹🇷

   Abelian dark sector scenarios embedded into the two-Higgs doublet model are scrutinized within the Coherent Elastic Neutrino-Nucleus Scattering (CE$\nu$NS) experiment, which was first measured by the COHERENT Collaboration in 2017 with an ongoing effort to improve it since then and recently released data for the CsI target in 2022. In the theoretical framework, it is assumed that there is a $U(1)$ gauge group in the dark sector with a non-zero kinetic mixing with the hypercharge field. The COHERENT data for the targets CsI and liquid argon (LAr) are treated in both single and multi bin bases to constrain the multi dimensional parameter space, spanned by the dark gauge coupling, kinetic mixing parameter and the dark photon mass, of totally seven different representative scenarios which are also compared and contrasted among each other to find out about the most sensitive one to the data. The effect of refined quenching factor is also addressed.

   hep-phhep-exPRD(2023)·5 citations
2. 02*

   Global Fit of Modified Quark Couplings to EW Gauge Bosons and Vector-Like Quarks in Light of the Cabibbo Angle Anomaly

   Andreas Crivellin🇨🇭 · Matthew Kirk🇪🇸 · Teppei Kitahara🇯🇵 · Federico Mescia🇪🇸

   There are two tensions related to the Cabibbo angle of the CKM matrix. First, the determinations of $V_{us}$ from $K_{\mu 2}$, $K_{\ell 3}$, and $\tau$ decays disagree at the $3\sigma$ level. Second, using the average of these results in combination with $\beta$ decays (including super-allowed $\beta$ decays and neutron decay), a deficit in first-row CKM unitarity with a significance of again about $3\sigma$ is found. These discrepancies, known as the Cabibbo Angle anomaly, can in principle be solved by modifications of $W$ boson couplings to quarks. However, due to $SU(2{)}_L$ invariance, $Z$ couplings to quarks are also modified and flavour changing neutral currents can occur. In order to consistently assess the agreement of a new physics hypothesis with data, we perform a combined analysis for all dimension-six Standard Model Effective Field Theory operators that generate modified $W$ couplings to first and second generation quarks. We then study models with vector-like quarks, which are prime candidates for a corresponding UV completion as they can affect $W$-quark couplings at tree level, and we perform a global fit including flavour observables (in particular loop effects in $\Delta F=2$ processes). We find that the best fit can be obtained for the $SU(2{)}_L$ doublet vector-like quark $Q$ as it can generate right-handed $W$-$u$-$d$ and $W$-$u$-$s$ couplings as preferred by data.

   hep-phhep-exJHEP(2023)·59 citations
3. 03*

   Theory of Inclusive B Decays

   Gil Paz🇺🇸

   In this talk I briefly review the current status of the theory of the inclusive $B$ decays: $\bar{B}\to X_c\ell {\bar{\nu }}_{\ell }$, $\bar{B}\to X_u\ell {\bar{\nu }}_{\ell }$, and $\bar{B}\to X_s\gamma$. I try to answer three questions: what is the current "state of the art", can the theoretical prediction be improved, and will it lead to a smaller theoretical uncertainty.

   hep-phhep-exSpringer Proc.Phys.(2023)·1 citation
4. 04*

   Non-adiabatic Level Crossing in Resonant Neutrino Oscillations

   Stephen J. Parke🇺🇸

   Analytic results are presented for the probability of detecting an electron neutrino after passage through a resonant oscillation region. If the electron neutrino is produced far above the resonance density, this probability is simply given by $⟨P_{{\nu }_e}⟩\approx {\sin }^2{\theta }_0+P_{\text{x}}\cos 2{\theta }_0$, where ${\theta }_0$ is the vacuum mixing angle. The probability is averaged over the production as well as the detection positions of the neutrino and $P_{\text{x}}$ is the Landau-Zener transition probability between adiabatic states. Finally, this result is applied to resonance oscillations within the solar interior.

   hep-phhep-exPRL(1986)·557 citations
5. 05*

   New perspectives in Gravity-Mediated Supersymmetry Breaking

   Robin Ducrocq🇫🇷

   New solutions in supersymmetry breaking through gravity mediation have been recently discovered. Such solutions have interesting properties regarding renormalisation and introduce new contributions in the scalar potential that may help to resolve some issues of the Standard Model. The purpose of this article is to investigate the consequences of these new structures. We construct a model related to these new solutions, the S2MSSM, and present some preliminary results on the effects of these new contributions, especially on the Standard Model's Higgs boson mass.

   hep-phhep-thSciPost Phys.Proc.(2023)·0 citations
6. 06*

   Temperature Dependence of Gluon and Ghost Propagators in a Dyson-Schwinger Equations context

   L. P. Kaptari🇷🇺

   We investigate the finite-temperature structure of ghost and gluon propagators within an approach based on the rainbow truncated Dyson-Schwinger equations in Landau gauge. The method, early used for modeling the quark, ghost and gluon propagators in vacuum, is extended to finite temperatures. In Euclidean space, within the Matsubara imaginary-time formalism it is necessary to distinguish between the transversal and longitudinal, with respect to the heat bath, gluon dressing functions, for which the Dyson-Schwinger equation splits into a corresponding system of coupled equations. This system is considered within the rainbow approximation generalized to finite temperatures and solved numerically. The solutions for the ghost and gluon propagators are obtained as functions of temperature $T$, Matsubara frequency ${\Omega }_n$ and three-momentum squared ${\mathbf{k}}^2$. It is found that, for zero Matsubara frequency, the dependence of the ghost and gluon dressing functions on ${\mathbf{k}}^2$ are not sensitive to the temperature $T$, while at ${\mathbf{k}}^2=0$ their dependence on $T$ is quite strong. Dependence on the Matsubara frequency ${\Omega }_n$ is investigated as well.The performed numerical analysis of the solution of the Dyson-Schwinger equations shows that at certain value of the temperature $T_0\sim 150$ MeV the iteration procedure does not longer converge. In the vicinity of $T_0$ the longitudinal gluon propagator increases quite fastly, whereas the transversal propagator does not exhibit any irregularity. This in a qualitative agreement with results obtained within the QCD lattice calculations in this temperature interval.

   hep-phnucl-th0 citations
7. 07*

   Complete two-loop QCD amplitudes for $tW$ production at hadron colliders

   Long-Bin Chen🇨🇳 · Liang Dong🇨🇳 · Hai Tao Li🇨🇳 · Zhao Li🇨🇳 · Jian Wang🇨🇳 · Yefan Wang🇨🇳

   We calculate the complete two-loop QCD amplitudes for hadronic $tW$ production by combining analytical and numerical techniques. The amplitudes have been first reduced to master integrals of eight planar and seven non-planar families, which can contain at most four massive propagators. Then a rational transformation of the master integrals is found to obtain a good basis so that the dimensional parameter decouples from the kinematic variables in the denominators of reduction coefficients. The master integrals are computed by solving their differential equations numerically. We find that the finite part of the two-loop squared amplitude is stable in the bulk of the phase space. After phase space integration and convolution with the parton distributions, it increases the LO cross section by about $3\%$.

   hep-phJHEP(2023)·8 citations
8. 08*

   Magnetized matter effects on dilaton photon mixing

   Ankur Chaubey🇮🇳 · Manoj K. Jaiswal🇮🇳 · Avijit K. Ganguly🇮🇳

   Dilatons ($\varphi (x)$) are a class of bosonic scalar particles associated with scaling symmetry and its compensation (under the violations of the same). Due to two photon coupling, they can produce optical signatures in a magnetic field. In vacuum or plain matter they couple to one of the transversely polarized state of the photon. But in a magnetized matter, they couple to both the transversely polarized state of photon (due to emergence of a parity violating part of photon self energy contribution from a magnetized matter). A part of this work is directed towards understanding the issue of mixing of scalar with various polarizations states of photon in a medium ( magnetized or unmagnetized ) due to the constraints from different discrete (CPT) symmetries associated with the interaction. Based on these symmetry aided arguments, the structure of the mixing matrix is found to be $3\times 3$. Thus there exists non-zero finite probabilities of oscillation between different polarization states of photon to dilaton. Our analytical and numerical analysis show no existence of periodic oscillation length either in temporal or spatial direction for most general values of the parameters in the theory. Possible astrophysical consequences of these results, those can be detected through observations are discussed.

   hep-phPRD(2023)·4 citations
9. 09*

   Interplay of the charged Higgs effects in $R_{D^{(\ast )}}$, $b\to s{\ell }^{+}{\ell }^{-}$ and $W$-mass

   Girish Kumar🇹🇼

   Current data on semileptonic charged- and neutral-current $B$ decays show deviations from the predictions of the Standard Model. It is well known that a charged Higgs boson, belonging to the two-Higgs doublet model without $Z_2$ symmetry, offers one of the simplest solution to the charged-current $B$ decays. We show that this solution naturally induces a negative shift of $\mathcal{O}(1)$ in the Wilson coefficient ($C_{9\ell }$) of operator $({\bar{s}}_L{\gamma }_{\mu }{b}_L)(\bar{\ell }{\gamma }^{\mu }\ell )$, potentially resolving the tension in neutral-current $B$ decays as well. Interestingly, the lepton universality ratios in $b\to s{\ell }^{+}{\ell }^{-}$ decays, in tune with the recent LHCb result, remain SM-like. Precision constraints from neutral $B$ and $K$ meson mixing, decays $B_c\to \tau \bar{\nu }$, $B\to X_s\gamma$, and leptonic decays of $\tau$ and $Z$ can be satisfied. Furthermore, a positive shift in $W$-boson mass, nicely in agreement with the CDF measurement, is also possible, requiring the neutral scalars to be heavier than the charged Higgs but within the sub-TeV region.

   hep-phPRD(2023)·20 citations
10. 10*

    Parton distribution functions and QCD coupling constant from LHC and non-LHC data

    Majid Azizi🇮🇷 · Ali Khorramian🇮🇷 · Saeid Paktinat Mehdiabadi🇮🇷

    We present a new QCD analysis of parton distribution functions (PDFs) at the next-to-leading order (NLO) and next-to-next-to-leading order (NNLO). In the present paper, the role of special types of experimental measurements for extracting PDFs is investigated and simultaneously the values of the strong coupling constant are determined. Essential elements of this QCD analysis are: the HERA combined data as a base, heavy quark cross section measurement together with Tevatron data on jet production and H1 and ZEUS jet cross sections as "non-LHC" data, and especially the "LHC" data set for top-quark and jet cross sections. These different data sets have allowed detailed information at low $x$, worth information on the nucleon's flavor and have played an important role for some PDFs at large-$x$ and strong coupling constant. Since the large-$x$ gluon PDF benefits from an accurate determination of quark PDFs, we have enough motivation to focus on the top-quark production and jet cross section measurements from LHC to find the impact of these data on the gluon PDF and strong coupling constant. These experimental data have an impact on the relative uncertainties of PDF. The gluon PDF at large-$x$ and the values of ${\alpha }_s(M_Z^2)$ are affected significantly. Although, the main motivation of this paper is to focus on gluon PDF and also its uncertainty at large-$x$, but notice to heavy PDFs behavior in this region is also very important. We study the intrinsic charm (IC) using BHPS model with together our extracted extrinsic charm PDF at large $x$ which can be very worth for future experiment at the LHC.

    hep-phPRD(2022)·3 citations
11. 11*

    Distinguishing Non-Standard Interaction and Lorentz Invariance Violation at Protvino to Super-ORCA experiment

    Rudra Majhi🇮🇳 · Dinesh Kumar Singha🇮🇳 · Monojit Ghosh🇭🇷 · Rukmani Mohanta🇮🇳

    As the two phenomena, non-standard interaction (NSI) in neutrino propagation and Lorentz invariance violation (LIV) modify the Hamiltonian of neutrino oscillation in a similar fashion, it is very difficult to distinguish these two effects. The only difference between them lies in the fact that NSI depends on the matter density, whereas LIV is independent of the earth matter effect. Therefore for a fixed baseline experiment, where matter density is constant, the theories describing NSI and LIV are exactly equivalent. However, as the present and future bounds of the NSI and LIV parameters are not equivalent, one can distinguish these two scenarios in the long-baseline neutrino experiments depending on their statistics with respect to the present and future bounds of these parameters. In this paper, we attempt to differentiate between LIV and NSI in the context of DUNE and P2SO, as these two future experiments are believed to be sensitive to the strongest matter effect and will have very large statistics. Taking LIV in the data and NSI in theory, our results show that, indeed it is possible to have good discrimination between LIV and NSI. The best separation between LIV and NSI at $3\sigma$ C.L. is achieved for the parameter $a_{\mu \mu }$ with P2SO. In this case, the value of LIV parameter for which separation is possible, lies within its future bound, if one considers the value of NSI parameter to be constrained by the present experiments. Between DUNE and P2SO, the latter has better sensitivity for such discrimination.

    hep-phPRD(2023)·23 citations
12. 12*

    Towards unification of lepton and quark mass matrices from double covering of modular $A_4$ flavor symmetry

    Petr Beneš🇨🇿 · Hiroshi Okada🇰🇷 · Yuta Orikasa🇨🇿

    We study quark and lepton masses and mixings in a double covering of modular $A_4$ flavor symmetry in which we search for common solution of a single modulus $\tau$, applying chi-square numerical analysis under the as minimum framework as possible. We have found the common region of $\tau$ within $5\sigma$ interval that is narrow in case of normal hierarchy, but not found in case of inverted hierarchy.

    hep-ph9 citations
13. 13*

    Gravitational transition form factors of $N\to \Delta$ via QCD light-cone sum rules

    U. Özdem🇹🇷 · K. Azizi🇮🇷

    We present the first direct calculation on the gravitational form factors (GFFs) of the $N\to \Delta$ transition using an analytic method, the QCD light-cone sum rules. The matrix element of the quark part of the energy momentum tensor current sandwiched between the nucleon and $\Delta$ states are parameterized in terms of five independent conserved and four independent non-conserved GFFs, for calculation of which we use the distribution amplitudes (DAs) of the on-shell nucleon expanded in terms of functions with different twists. We present the results for two sets of light-cone input parameters. The results indicate that the behavior of the form factors with respect to $Q^2$ are described by multipole fit functions. Our results may be checked by other phenomenological models including the Lattice QCD as well as future related experiments.

    hep-phhep-exhep-latJHEP(2023)·19 citations
14. 14*

    A Search for Dark Matter Lines at the Galactic Center with 14 Years of Fermi Data

    Joshua W. Foster🇺🇸 · Yujin Park🇺🇸 · Benjamin R. Safdi🇺🇸 · Yotam Soreq🇮🇱 · Weishuang Linda Xu🇺🇸

    Dark matter (DM) in the Milky Way halo may annihilate or decay to photons, producing monochromatic gamma rays. We search for DM-induced spectral lines using 14 years of data from the Large Area Telescope onboard the Fermi Gamma-ray Space Telescope ($\text{Fermi}$-LAT) between $10\mathrm{GeV}$ and $2\mathrm{TeV}$ in the inner Milky Way leveraging both the spatial and spectral morphology of an expected signal. We present new constraints as strong as $⟨\sigma v⟩\lesssim 6\times 10^{-30}{\mathrm{cm}}^3/\mathrm{s}$ for the two-to-two annihilations and $\tau \gtrsim 10^{30}\mathrm{s}$ for one-to-two decays, representing leading sensitivity between $10\mathrm{GeV}$ and $\sim$$500\mathrm{GeV}$. We consider the implications of our line-constraints on the Galactic Center Excess (GCE), which is a previously-observed excess of continuum $\sim$GeV gamma-rays that may be explained by DM annihilation. The Higgs portal and neutralino-like DM scenarios, which have been extensively discussed as possible origins of the GCE, are constrained by our work because of the lack of observed one-loop decays to two photons. More generally, we interpret our null results in a variety of annihilating and decaying DM models, such as neutralinos, gravitinos, and glueballs, showing that in many cases the line search is more powerful than the continuum, despite the continuum annihilation being at tree level.

    hep-phastro-ph.COastro-ph.HEPRD(2023)·44 citations
15. 15*

    Telling compositeness at a distance with outer automorphisms and CP

    Ingolf Bischer🇩🇪 · Christian Döring🇩🇪 · Andreas Trautner🇩🇪

    We investigate charge-parity (CP) and non-CP outer automorphism of groups and the transformation behavior of group representations under them. We identify situations where composite and elementary states that transform in exactly the same representation of the group, transform differently under outer automorphisms. This can be instrumental in discriminating composite from elementary states solely by their quantum numbers with respect to the outer automorphism, i.e. without the need for explicit short distance scattering experiments. We discuss under what conditions such a distinction is unequivocally possible. We cleanly separate the case of symmetry constrained (representation) spaces from the case of multiple copies of identical representations in flavor space, and identify conditions under which non-trivial transformation in flavor space can be enforced for composite states. Next to composite product states, we also discuss composite states in non-product representations. Comprehensive examples are given based on the finite groups $\Sigma (72)$ and $D_8$. The discussion also applies to $\mathrm{SU}(N)$ and we scrutinize recent claims in the literature that $\mathrm{SU}(2N)$ outer automorphism with antisymmetric matrices correspond to distinct outer automorphisms. We show that outer automorphism transformations with antisymmetric matrices are related by an inner automorphism to the standard ${\mathbb{Z}}_2$ outer automorphism of $\mathrm{SU}(N)$. As a direct implication, no non-trivial transformation behavior can arise for composite product states under the outer automorphism of $\mathrm{SU}(N)$.

    hep-phhep-thquant-phJ.Phys.A(2023)·5 citations
16. 16*

    Flavonstrahlung in the $B_3-L_2$ $Z^{\prime }$ Model at Current and Future Colliders

    Ben Allanach🇬🇧 · Eetu Loisa🇬🇧

    The $B_3-L_2$ $Z^{\prime }$ model may explain some gross features of the fermion mass spectrum as well as $b\to s\ell \ell$ anomalies. A TeV-scale physical scalar field associated with gauged $U(1{)}_{B_3-L_2}$ spontaneous symmetry breaking, the flavon field $\vartheta$, affects Higgs phenomenology via mixing. In this paper, we investigate the collider phenomenology of the flavon field. Higgs and $W$ boson mass data are used to place bounds upon parameter space. We then examine flavonstrahlung ($Z^{\prime }\to Z^{\prime }\vartheta$ production) at colliders as a means to directly produce and discover flavon particles, providing direct empirical evidence tying it to $U(1{)}_{B_3-L_2}$ symmetry breaking. A 100 TeV FCC-hh or a 10 TeV muon collider would have high sensitivity to flavonstrahlung, whereas the HL-LHC can observe it only in extreme corners of parameter space.

    hep-phJHEP(2023)·14 citations
17. 17*

    Towards A Direct Detection of the Spin of Dark Matter

    Leah Jenks🇺🇸 · Konstantinos Koutrolikos🇺🇸 · Evan McDonough🇨🇦 · Stephon Alexander🇺🇸 · S. James Gates Jr🇺🇸

    We investigate the contribution of higher spin particles in the signal of direct detection experiments searching for dark matter. We consider a bosonic or fermionic higher spin dark matter (HSDM) candidate which interacts with the Standard Model via a dark U(1) mediator. For a particular subclass of interactions, spin-polarized targets may be used for spin determination: The angular dependence of scatterings can distinguish integer (spin-$s$) vs. half-integer (spin-$s+1/2$), while the recoil energy dependence of the signal determines $s$. We consider also the signal of a supersymmetric higher spin dark sector, which suggests a characteristic signal (''SUSY Rilles'') for directional direct detection.

    hep-phastro-ph.COgr-qchep-thPLB(2023)·9 citations
18. 18*

    New Covariant Feynman Rules for Effective Field Theories

    Gero von Gersdorff🇧🇷 · Kevin Santos🇧🇷

    We provide a new and completely general formalism to compute the effective field theory matching contributions from integrating out massive fields in a manifestly gauge covariant way, at any desired loop order. The formalism is based on old ideas such as the background field method and the heat kernel, however we add some crucial new ingredients that greatly improve the simplicity and general applicability of the approach. We formulate our method in terms of Feynman rules, the resulting effective action is expressed in terms of local heat kernel coefficients. We also provide as supplementary material a mathematica code that facilitates the computation of these coefficients.

    hep-phhep-thJHEP(2023)·11 citations
19. 19*

    Measuring gravitational force from Femto-gram source masses

    Ahmed Roman🇺🇸 · Asem Hassan🇨🇾 · Mohamed ElKabbash

    Gravity is the weakest of all known forces. Measuring the force of gravity from micro and nano-scale source masses is an essential first step toward low-energy quantum gravity tests. In addition, measuring gravitational forces where the center-of-mass inter-distance is at the sub-mm scale extends the experimentally achievable parameter space for tests of Yukawa-like corrections to Newtonian gravity and tests for higher dimensions proposed to resolve the hierarchy problem of fundamental forces. Here, we propose an experiment using two optically trapped particles in ultrahigh vacuum conditions where the center of mass inter-distance is on the order of $10^{2}nm$. In the proposed experiment, the source mass is a rotating Janus nano-particle such that the test mass (sensor) experiences a periodic gravitational potential. Using realistic experimental parameters, a signal-to-noise ratio $\ge 1$ is obtained for a Janus particle with radius $\ge 10^{2}nm$ and a mass $\ge \text{10 }fg$. The proposed experiment extends the search of Yukawa corrections to gravity at $\approx 10^{-5}$ times gravity regime at $10^{2}nm$ interaction range, opens the door to low energy tests for quantum gravity, and enables direct experimental tests of extra-dimensional solutions to the hierarchy problem.

    ↳ gr-qchep-ph0 citations
20. 20*

    Massive to Massless by Applying a Nonlocal Field Redefinition

    Mojtaba Najafizadeh🇮🇷

    The invariance of physical observables like particle's mass under a local field redefinition is a well-known and important property of quantum field theory. In this paper, on the other hand, we investigate nonlocal field redefinitions eliminating a physical observable from a theory. Indeed, by giving explicit examples, we present invertible nonlocal field redefinitions reducing a massive theory to the massless one, and vice versa. The studied examples are: classical harmonic oscillator, the scalar field theory, and the Dirac field theory.

    ↳ hep-thhep-phphysics.class-phPRD(2023)·1 citation
21. 21*

    Subdominant Modes of Scalar Superradiant Instability and Gravitational Wave Beats

    Yin-da Guo🇨🇳 · Shou-shan Bao🇨🇳 · Hong Zhang🇨🇳

    Ultralight scalars could extract energy and angular momentum from a Kerr black hole (BH) because of superradiant instability. Multiple modes labelled with $nlm$ grow while rotating around the BH, emitting continuous gravitational wave (GW). In this work, we carefully study the contribution of the subdominant modes with $n\ge 1$ in the evolution of the BH-condensate system. We find the BH still evolves along the Regge trajectory of the $n=0$ modes even with the presence of the subdominant modes. The interference of the dominant and the subdominant modes produces beats in the emitted GW, which could be used to distinguish the BH-condensate systems from other monochromatic GW sources, such as neutron stars.

    ↳ gr-qchep-phPRD(2023)·20 citations
22. 22*

    Effective Hamiltonians and Counterterms for Hamiltonian Truncation

    Joan Elias Miro🇮🇹 · James Ingoldby🇮🇹

    We outline a procedure for applying Hamiltonian Truncation to Quantum Field Theories (QFTs) that have UV divergences. To do this, we derive a novel representation of an Effective Hamiltonian which makes manifest some of its important properties (e.g. the non-perturbative matching of the spectra between the UV theory and the theory described by the Effective Hamiltonian). We check the consistency of our procedure using Conformal Perturbation Theory. Finally we comment on how the Effective Hamiltonian, which incorporates non-local interactions, describes a local QFT.

    ↳ hep-thcond-mat.stat-mechhep-lathep-phJHEP(2023)·18 citations
23. 23*

    Reconstructing charged particle track segments with a quantum-enhanced support vector machine

    Philippa Duckett🇬🇧 · Gabriel Facini🇬🇧 · Marcin Jastrzebski🇬🇧 · Sarah Malik🇬🇧 · Sebastien Rettie🇬🇧 · Tim Scanlon🇬🇧

    Reconstructing the trajectories of charged particles from the collection of hits they leave in the detectors of collider experiments like those at the Large Hadron Collider (LHC) is a challenging combinatorics problem and computationally intensive. The ten-fold increase in the delivered luminosity at the upgraded High Luminosity LHC will result in a very densely populated detector environment. The time taken by conventional techniques for reconstructing particle tracks scales worse than quadratically with track density. Accurately and efficiently assigning the collection of hits left in the tracking detector to the correct particle will be a computational bottleneck and has motivated studying possible alternative approaches. This paper presents a quantum-enhanced machine learning algorithm that uses a support vector machine (SVM) with a quantum-estimated kernel to classify a set of three hits (triplets) as either belonging to or not belonging to the same particle track. The performance of the algorithm is then compared to a fully classical SVM. The quantum algorithm shows an improvement in accuracy versus the classical algorithm for the innermost layers of the detector that are expected to be important for the initial seeding step of track reconstruction.

    ↳ hep-exhep-phPRD(2024)·16 citations
24. 24*

    Quantum Tunneling of Ultralight Dark Matter Out of Satellite Galaxies

    Mark P. Hertzberg🇺🇸 · Abraham Loeb🇺🇸

    The idea of ultralight scalar (axion) dark matter is theoretically appealing and may resolve some small-scale problems of cold dark matter; so it deserves careful attention. In this work we carefully analyze tunneling of the scalar field in dwarf satellites due to the tidal gravitational force from the host halo. The tidal force is far from spherically symmetric; causing tunneling along the axis from the halo center to the dwarf, while confining in the orthogonal plane. We decompose the wave function into a spherical term plus higher harmonics, integrate out angles, and then numerically solve a residual radial Schrödinger-Poisson system. By demanding that the core of the Fornax dwarf halo can survive for at least the age of the universe places a bound on the dark matter particle mass $2\times 10^{-22}\text{mbox}eV\lesssim m\lesssim 6\times 10^{-22}$eV. Interestingly, we show that if another very low density halo is seen, then it rules out the ultralight scalar as core proposal completely. Furthermore, the non-condensed particles likely impose an even sharper lower bound. We also determine how the residual satellites could be distributed as a function of radius.

    ↳ astro-ph.COgr-qchep-phhep-th+1JCAP(2023)·11 citations
25. 25*

    Efficiently evaluating loop integrals in the EFTofLSS using QFT integrals with massive propagators

    Charalampos Anastasiou🇨🇭 · Diogo P. L. Bragança🇨🇳 · Leonardo Senatore🇨🇭 · Henry Zheng🇺🇸

    We develop a new way to analytically calculate loop integrals in the Effective Field Theory of Large Scale-Structure. Previous available methods show severe limitations beyond the one-loop power spectrum due to analytical challenges and computational and memory costs. Our new method is based on fitting the linear power spectrum with cosmology-independent functions that resemble integer powers of quantum field theory massive propagators with complex masses. A remarkable small number of them is sufficient to reach enough accuracy. Similarly to former approaches, the cosmology dependence is encoded in the coordinate vector of the expansion of the linear power spectrum in our basis. We first produce cosmology-independent tensors where each entry is the loop integral evaluated on a given combination of basis vectors. For each cosmology, the evaluation of a loop integral amounts to contracting this tensor with the coordinate vector of the linear power spectrum. The 3-dimensional loop integrals for our basis functions can be evaluated using techniques familiar to particle physics, such as recursion relations and Feynman parametrization. We apply our formalism to evaluate the one-loop bispectrum of galaxies in redshift space. The final analytical expressions are quite simple and can be evaluated with little computational and memory cost. We show that the same expressions resolve the integration of all one-loop $N$-point function in the EFTofLSS. This method, which is originally presented here, has already been applied in the first one-loop bispectrum analysis of the BOSS data to constraint $\Lambda$CDM parameters and primordial non-Gaussianities, see arXiv:2206.08327 and arXiv:2201.11518.

    ↳ astro-ph.COhep-phhep-thJHEP(2024)·25 citations
26. 26*

    Conformal field theories dual to quantum gravity with strongly coupled matter

    Luis Apolo🇳🇱 · Alexandre Belin🇳🇱 · Suzanne Bintanja🇳🇱 · Alejandra Castro🇬🇧 · Christoph A. Keller🇺🇸

    A holographic conformal field theory is dual to semi-classical general relativity in Anti-de Sitter space coupled to matter fields. If the CFT factorizes in the large-$N$ limit, then all couplings in its dual are suppressed by the Planck scale, making the matter fields weakly interacting. We propose a mechanism to produce CFTs whose dual matter fields couple weakly to gravity, but interact strongly with each other. We achieve this by turning on exactly marginal multi-trace deformations, and quantify the effect using conformal perturbation theory.

    ↳ hep-thgr-qchep-phPRD(2023)·11 citations
27. 27*

    D-brane and F-theory Model Building

    Fernando Marchesano🇪🇸 · Bert Schellekens🇳🇱 · Timo Weigand🇩🇪

    We review recent progress in the construction of four-dimensional vacua of Type II string theory and F-theory which yield the Standard Model of particle physics (SM) or extensions thereof. In Type II orientifold compactifications the SM gauge group and chiral spectrum arise from the open string sector of the theory, namely from stacks of D-branes. The universal features of the chiral spectrum between various sets of D-branes allow for a general approach to build realistic models, which can be implemented in different setups. We describe the realisation of this strategy in Type II Calabi-Yau orientifold compactifications and Rational Conformal Field Theories, discussing the specific model building rules and features of each setting. The same philosophy can be extended to F-theory constructions. These provide new model building possibilities, as they combine the localisation properties of D-branes with exceptional gauge groups and their representations.

    ↳ hep-thhep-ph24 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.