HEP Phenomenology·hep-ph

Mon·Feb 27, 2023Monday·February 27, 2023

14 papers—9 primary·5 cross-listed·reconstructed*

01*
In-medium properties of the light and heavy-light mesons in a light-front quark model
Ahmad Jafar Arifi🇰🇷 · Parada. T. P. Hutauruk🇰🇷 · Kazuo Tsushima🇧🇷
We investigate the in-medium properties of pseudoscalar and vector mesons with the light-light and heavy-light quarks in a light-front quark model, using the in-medium quark properties computed by the quark-meson coupling model. Both models are constructed on an equal footing with the constituent quark degree of freedom. Here, we particularly focus on the weak decay constants and distribution amplitudes (DAs) of the mesons in symmetric nuclear matter. We find that the weak decay constants decrease as nuclear density increases for $π$ , $K$ , $D$ , and $B$ pseudoscalar as well as $ρ$ , $K^{*}$ , $D^{*}$ , and $B^{*}$ vector mesons, where their properties in free space have good agreement with the available experimental and lattice QCD data. A larger reduction is found for the light-light quark pseudoscalar mesons, while a smaller reduction is found for the heavy-light quark vector mesons, in particular, with the bottom quark. We discuss the effect of the vector potential on the weak decay constants and present our predictions for the in-medium modifications of DAs. Also, a comparison with the free space lattice QCD data is made.
hep-phhep-exnucl-exnucl-thPRD(2023)·22 citations
02*
Medium Correction to Gravitational Form Factors
Shu Lin🇨🇳 · Jiayuan Tian🇨🇳
We generalize the gravitational form factor for chiral fermion in vacuum, which reproduces the well-known spin-vorticity coupling. We also calculate radiative correction to the gravitational form factors in quantum electrodynamics plasma. We find two structures in the form factors contributing to the scattering amplitude of fermion in vorticity field, one is from the fermion self-energy correction, pointing to suppression of spin-vorticity coupling in medium; the other structure comes from graviton-fermion vertex correction, which does not adopt potential interpretation, but corresponds to transition matrix element between initial and final states. Both structures contribute to axial chiral vortical effect. The net effect is that radiative correction enhances the axial chiral vortical effect. Our results clarify the relation and difference between spin-vorticity coupling and axial chiral vortical effect from the perspective of form factors. We also discuss the application of the results in quantum chromodynamic plasma, indicating radiative correction might have an appreciable effect in spin polarization effect in heavy ion collisions.
hep-phnucl-thActa Phys.Sin.(2023)·4 citations
03*
Nonleptonic $B_{c}$ decay rates from model independent relations
Nicola Losacco🇮🇹
Nonleptonic $B_{c}$ decays to $P$ -wave charmonia and light $π^{+}$ , $K^{+}$ , and $ρ^{+}$ , $K^{*+}$ mesons are analysed using factorization. The hadronic form factors parametrizing the $B_{c} \to χ_{c J} (h_{c})$ matrix elements are expressed in terms of universal functions at the leading order of an expansion in the relative velocity of the heavy quarks in the $B_{c}$ rest-frame and in $1/ m_{Q}$ . Several ratios of branching fractions are evaluated, and when experimental information can be used, single branching fractions are presented. Both the $1 P$ and $2 P$ charmonia are considered. If the exotic candidate state $χ_{c 1} (3872)$ corresponds to $χ_{c 1} (2 P)$ , it should be produced in nonleptonic $B_{c}$ decays with predicted abundances with respect to the other states in the charmonium $2 P$ spin four-plet.
hep-phMod.Phys.Lett.A(2023)·6 citations
04*
Modular Flavor Symmetries and CP from the top down
Andreas Trautner🇩🇪
The framework of compactified heterotic string theory offers consistent ultraviolet (UV) completions of the Standard Model (SM) of particle physics. In this approach, the existence of flavor symmetries beyond the SM is imperative and the flavor symmetries can be derived from the top down. Such a derivation uncovers a unified origin of traditional discrete flavor symmetries, discrete modular flavor symmetries, discrete R symmetries of supersymmetry, as well as charge-parity (CP) symmetry - altogether dubbed the eclectic flavor symmetry. I will illustrate how the eclectic flavor symmetry is unambiguously computed from the top-down construction, discuss the different arising sources of spontaneous flavor symmetry breaking, and expose possible lessons for bottom-up flavor model building. Finally, I will focus on one explicit example model that provides a successful fit to all available experimental data while giving rise to concrete predictions for so-far undetermined parameters.
hep-phhep-thPoS(2024)·2 citations
05*
Towards UV-Models of Kinetic Mixing and Portal Matter III: Relating Portal Matter and R-H Neutrino Masses
Thomas G. Rizzo🇺🇸
The kinetic mixing (KM) of a dark photon (DP) with the familiar one of the Standard Model (SM) requires the existence of a new set of fields, called portal matter (PM), which carry both SM and dark sector quantum numbers, some whose masses may lie at the TeV scale. In the vanilla KM model, the dark gauge group is just the simple $G_{D a r k} = U (1)_{D}$ needed to describe the DP while the SM gauge interactions are described by the usual $G_{S M} = S U (3)_{c} \times S U (2)_{L} \times U (1)_{Y}$ . However, we need to go beyond this simple model to gain a better understanding of the interplay between $G_{S M}$ and $G_{D a r k}$ and, in particular, determine how they both might fit into a more unified construction. Following our previous analyses, this generally requires $G_{D a r k}$ to be extended to a non-abelian group, \eg, $S U (2)_{I} \times U (1)_{Y_{I}}$ , under which both the PM and SM fields may transform non-trivially. In this paper, also inspired by our earlier work on top-down models, we consider extending the SM gauge group to that of the Left-Right Symmetric Model (LRM) and, in doing so, through common vacuum expectation values, link the mass scales associated with the breaking of $G_{D a r k} \to U (1)_{D}$ and the PM fields to that of the RH-neutrino as well as the heavy gauge bosons of the LRM. This leads to an interesting interplay between the now coupled phenomenologies of both visible and dark sectors at least some of which may be probed at, \eg, the LHC and/or at the future FCC-hh.
hep-phPRD(2023)·11 citations
06*
Light Dark Matter Search with Nitrogen-Vacancy Centers in Diamonds
So Chigusa🇺🇸 · Masashi Hazumi🇯🇵 · Ernst David Herbschleb🇯🇵 · Norikazu Mizuochi🇯🇵 · Kazunori Nakayama🇯🇵
We propose new ideas to directly search for light dark matter, such as the axion or the dark photon, by using magnetometry with nitrogen-vacancy centers in diamonds. If the dark matter couples to the electron spin, it affects the evolution of the Bloch vectors consisting of the spin triplet states, which may be detected through several magnetometry techniques. We give several concrete examples with the use of dc and ac magnetometry and estimate the sensitivity on dark matter couplings.
hep-phcond-mat.mes-hallhep-exquant-phJHEP(2025)·32 citations
07*
A general algorithm to build real-radiation antenna functions for higher-order calculations
Oscar Braun-White🇬🇧 · Nigel Glover🇬🇧 · Christian T Preuss🇨🇭
The antenna subtraction method has been successfully applied to a wide range of processes relevant for the Large Hadron Collider at next-to-next-to-leading order in $α_{s}$ (NNLO). We propose an algorithm for building antenna functions for any number of real emissions from an identified pair of hard radiator partons directly from a specified list of unresolved limits. We use the algorithm to explicitly build all single- and double-real QCD antenna functions and compare them to the previous antenna functions, which were extracted from matrix elements. The improved antenna functions should be more easily applicable to NNLO subtraction terms. Finally, we match the integration of the antenna functions over the final-final unresolved phase space to the previous incarnation, serving as an independent check on our results.
hep-phJHEP(2023)·30 citations
08*
NNLO QCD predictions for Z-boson production in association with a charm jet within the LHCb fiducial region
R. Gauld🇩🇪 · A. Gehrmann-De Ridder🇨🇭 · E. W. N. Glover🇬🇧 · A. Huss🇨🇭 · A. Rodriguez Garcia🇨🇭 · G. Stagnitto🇨🇭
We compute next-to-next-to-leading order (NNLO) QCD corrections to neutral vector boson production in association with a charm jet at the LHC. This process is studied in the forward kinematics at $s = 13$ TeV, which may provide valuable constraints on the intrinsic charm component of the proton. A comparison is performed between fixed order and NLO predictions matched to a parton shower showing mutual compatibility within the respective uncertainties. NNLO corrections typically lead to a reduction of theoretical uncertainties by a factor of two and the perturbative convergence is further improved through the introduction of a theory-inspired constraint on the transverse momentum of the vector boson plus jet system. A comparison between these predictions with data will require an alignment of a flavour-tagging procedure in theory and experiment that is infrared and collinear safe.
hep-phhep-exEPJC(2023)·24 citations
09*
A Direct Detection View of the Neutrino NSI Landscape
Dorian W. P. Amaral🇺🇸 · David Cerdeno🇪🇸 · Andrew Cheek🇵🇱 · Patrick Foldenauer🇪🇸
In this article, we study the potential of direct detection experiments to explore the parameter space of general non-standard neutrino interactions (NSI) via solar neutrino scattering. Due to their sensitivity to neutrino-electron and neutrino-nucleus scattering, direct detection provides a complementary view of the NSI landscape to that of spallation sources and neutrino oscillation experiments. In particular, the large admixture of tau neutrinos in the solar flux makes direct detection experiments well-suited to probe the full flavour space of NSI. To study this, we develop a re-parametrisation of the NSI framework that explicitly includes a variable electron contribution and allows for a clear visualisation of the complementarity of the different experimental sources. Using this new parametrisation, we explore how previous bounds from spallation source and neutrino oscillation experiments are impacted. For the first time, we compute limits on NSI from the first results of the XENONnT and LUX-ZEPLIN experiments, and we obtain projections for future xenon-based experiments. These computations have been performed with our newly developed software package, SNuDD. Our results demonstrate the importance of using a more general NSI parametrisation and indicate that next generation direct detection experiments will become powerful probes of neutrino NSI.
hep-phJHEP(2023)·43 citations
10*
Search for ER and/or NR-like dark matter signals with the especially low background liquid helium TPCs
Junhui Liao🇨🇳 · Yuanning Gao🇨🇳 · Guangpeng An · Fengbo Gu🇨🇳 · Shangmao Hu🇨🇳 · Zhuo Liang🇨🇳 · Gang Liu · Meiyuenan Ma · Zhaohua Peng🇺🇸 · Junfeng Xia🇨🇳 · Lei Zhang🇨🇳 · Lifeng Zhang🇨🇳 and 3 other authors
In the Dark Matter (DM) direct detection community, the absence of convincing signals has become a "new normal" for decades. Among other possibilities, the "new normal" might indicate that DM-matter interactions could generate not only the hypothetical NR (Nuclear Recoil) events but also the ER (Electron Recoil) ones, which have often been tagged as backgrounds historically. Further, we argue that ER and NR-like DM signals could co-exist in a DM detector's same dataset. So in total, there would be three scenarios we can search for DM signals: (i) ER excess only, (ii) NR excess only, and (iii) ER and NR excesses combined. To effectively identify any possible DM signal under the three scenarios, a DM detector should (a) have the minimum ER and NR backgrounds and (b) be capable of discriminating ER events from NR ones. Accordingly, we introduce the newly established project, ALETHEIA, which implements liquid helium-filled TPCs (Time Projection Chambers) in hunting for DM. Thanks to the nearly single-digit number of ER and NR backgrounds on 1 ton*yr exposure, presumably, the ALETHEIA detectors could identify any form of DM-induced excess in its ROI (Research Of Interest). As far as we know, ALETHEIA is the first DM direct detection experiment claiming such an inclusive search; conventional detectors search DM mainly on the "ER excess only" and/or the "NR excess only" channel, not the "ER and NR excesses combined" channel.
↳ astro-ph.IMhep-exhep-ph1 citation
11*
Di-Higgs searches at the LHC
Nadezda Chernyavskaya🇨🇭
An overview of the recent searches for Higgs boson pair production at the LHC was presented. The searches were based on approximately 140 $fb^{- 1}$ of data collected by the ATLAS and CMS experiments in proton-proton collisions at $s$ = 13 TeV. With respect to the previous searches, analysis techniques were significantly improved, and new signatures and decays channels were explored.
↳ hep-exhep-ph1 citation
12*
A realistic coalescence model for deuteron production
Maximilian Mahlein🇩🇪 · Luca Barioglio🇩🇪 · Francesca Bellini🇮🇹 · Laura Fabbietti🇩🇪 · Chiara Pinto🇩🇪 · Bhawani Singh🇩🇪 · Sushanta Tripathy🇮🇹
A microscopic understanding of (anti)deuteron production in hadron-hadron collisions is the subject of many experimental and theoretical efforts in nuclear physics. This topic is also very relevant for astrophysics, since the rare production of antinuclei in our Universe could be a doorway to discover new physics. In this work, we describe a new coalescence afterburner for event generators based on the Wigner function formalism and we apply it to the (anti)deuteron case, taking into account a realistic particle emitting source. The model performance is validated using the EPOS and PYTHIA event generators applied to proton-proton collisions at the centre-of-mass energy $s =$ 13 TeV, triggered for high multiplicity events, and the experimental data measured by ALICE in the same collision system. The model relies on the direct measurement of the particle emitting source carried out by means of nucleon-nucleon femtoscopic correlations in the same collision system and energy. The resulting model is used to predict deuteron differential spectra assuming different deuteron wavefunctions within the Wigner function formalism. The predicted deuteron spectra show a clear sensitivity to the choice of the deuteron wavefunction. The Argonne $v_{18}$ wavefunction provides the best description of the experimental data. This model can now be used to study the production of (anti)deuterons over a wide range of collision energies and be extended to heavier nuclei.
↳ hep-exhep-phEPJC(2023)·58 citations
13*
Proca Fields in Step-index Optical Fibres
Florian Steininger🇦🇹
The topic of a photon mass has received justified attention over the years with strong theoretical reasoning for its existence. We derive a full description of mode solutions in step-index optical fibres on the basis of Proca's equation as a model for massive photons. The no-go theorem recently found in coaxial waveguides does not appear in the optical fibre case.
↳ physics.class-phhep-phphysics.optics1 citation
14*
First look at the evaluation of three-loop non-planar Feynman diagrams for Higgs plus jet production
Johannes M. Henn🇩🇪 · Jungwon Lim🇩🇪 · William J. Torres Bobadilla🇩🇪
We present new computations for Feynman integrals relevant to Higgs plus jet production at three loops, including first results for a non-planar class of integrals. The results are expressed in terms of generalised polylogarithms up to transcendental weight six. We also provide the full canonical differential equations, which allows us to make structural observations on the answer. In particular, we find a counterexample to previously conjectured adjacency relations, for a planar integral of the tennis-court type. Additionally, for a non-planar triple ladder diagram, we find two novel alphabet letters. This information may be useful for future bootstrap approaches.
↳ hep-thhep-phJHEP(2023)·42 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.