Wed·Apr 12, 2023Wednesday·April 12, 2023

1. 01*

   Data driven isospin analysis of timelike octet baryons electromagnetic form factors and charmonium decay into baryon-anti-baryon

   Jian-Ping Dai🇨🇳 · Xu Cao🇨🇳 · Horst Lenske🇩🇪

   Inspired by the recent precise data, we perform model-independently an isospin decomposition of the timelike octet baryons electromagnetic form factors. As noted in our previous work, the relative magnitude of isoscalar and isovector component is determined with the input of data on various isospin channels. Herein we further assert that {their relative phase can be constraint by the phase difference of oscillatory modulation of effective form factors} between isospin channels. The framework is extended to analyze the data of differential cross sections and applied to the form factors of nucleon and hyperons with detail and isospin non-conservation of charmonium decay into baryon-anti-baryon as well. We address that isospin analysis is meaningful when the isospin broken scale is compared to or smaller than the uncertainties of data.

   hep-phnucl-thPLB(2023)·20 citations
2. 02*

   Is the LHCb $P_c(4312{)}^{+}$ plausible in the GlueX $\gamma p\to J/\psi p$ total cross sections ?

   Igor Strakovsky (GWU)🇺🇸 · William J. Briscoe (GWU)🇺🇸 · Eugene Chudakov (JLab)🇺🇸 · Ilya Larin (UMASS Amherst)🇺🇸 · Lubomir Pentchev (JLab)🇺🇸 · Axel Schmidt (GWU)🇺🇸 · Ronald L. Workman (GWU)🇺🇸

   New high-statistics total cross section data for $\gamma p\to J/\psi p$ from the GLUonic EXcitation (GlueX) experiment are fitted in a search for the exotic $P_c(4312{)}^{+}$ state observed by the Large Hadron Collider beauty (LHCb) collaboration. The integrated luminosity of this GlueX experiment was about $320\mathrm{p}{\mathrm{b}}^{-1}$. The fits show that destructive interference involving an $S$-wave resonance and associated non-resonance background produces a sharp dip structure about $75\mathrm{MeV}$ below the LHCb mass, in the same location as a similar structure is seen in the data. Limitations of the employed model and the need for improved statistics are discussed.

   hep-phhep-exnucl-exnucl-thPRC(2023)·23 citations
3. 03*

   Investigation of the scalar unparticle and anomalous couplings at muon colliders in final states with multiple photons in the Randall- Sundrum model

   Bui Thi Ha Giang🇻🇳 · Dang Van Soa🇻🇳 · Le Mai Dung🇻🇳

   The influence of the scalar unparticle and anomalous couplings at muon colliders in final states with multiple photons in the Randall-Sundrum model is evaluated in detail. The results indicate that with fixed collision energies, the total cross-sections for the production of multiple photons depend strongly on the polarization of the muon beams, the parameters of unparticle physics (the scaling dimension $d_U$, operator ${\mathcal{O}}_U$, the energy scale ${\Lambda }_U$) and also the strength of anomalous couplings. Numerical evaluation shows that the cross-sections for the production of four photons in finale states with the contribution of scalar anomalous couplings are much larger than that of the unparticle under the same conditions. In the Higgs-radion mixing, the cross sections achieve the maximum value at the radion-dominated state, $m_{\varphi }=125$ GeV, in which the cross-section is much enhanced and can be measurable in current experiments.

   hep-phInt.J.Mod.Phys.A(2024)·3 citations
4. 04*

   CKM and PMNS mixing matrix from $SO(2)$ flavor symmetry

   Guojun Xu🇨🇳 · Ying Zhang🇨🇳

   The relation between quark masses and CKM mixing is studied based on an approximate chiral $SO(2{)}_L\times SO(2{)}_R$ flavor symmetry of quark mass matrix. In mass hierarchy limit, the mass ratio effect to CKM mixing is suppressed, which separates mass hierarchy and quark flavor mixing into two independent problems. We show that CKM mixing is dominated by two left-handed $SO(2{)}_L^{u,d}$ symmetry while mass hierarchy only provides slight corrections. The same mixing structure is generalized to lepton sector with extended Dirac neutrinos. The common flavor mixing provides a novel comprehension on the relation between quark CKM mixing and lepton PMNS mixing.

   hep-phEPL(2023)·4 citations
5. 05*

   Transverse momentum structure of strange and charmed baryons: a light-front Hamiltonian approach

   Zhimin Zhu · Tiancai Peng · Zhi Hu · Siqi Xu · Chandan Mondal · Xingbo Zhao · James P. Vary · BLFQ Collaboration

   Under the basis light-front quantization framework, we investigate the leading-twist transverse-momentum-dependent parton distribution functions (TMDs) for $\Lambda$ and ${\Lambda }_c$ baryons, the spin-1/2 composite systems consisting of two light quarks ($u$ and $d$) and a $s/c$ quark. We evaluate the TMDs using the overlaps of the light-front wave functions in the leading Fock sector, which are obtained by solving the light-front eigenvalue equation. We also study the spin densities of quarks in momentum space for various polarizations. In the same model, we compare the TMDs of the strange and charmed baryons and the proton by reviewing their spin structures in the quark model and the probabilistic interpretations of their TMDs.

   hep-phPRD(2023)·21 citations
6. 06*

   Quasicrystals in QCD

   Zebin Qiu🇯🇵 · Muneto Nitta🇯🇵

   We study the ground state of the low energy dense QCD with the assumption of chiral condensates of quarks. Under an external magnetic field, mesons could form soliton lattices via the chiral anomaly. For such scenarios, we present a unified description of pions and $\eta$ meson with a $U(2)$ field in the framework of the chiral perturbation theory. Our result shows the ground state is a mixture of the magnetized domain walls formed by neutral pion ${\pi }^0$ and $\eta$ meson when they coexist. The winding number of the ground state would alter according to the strength of the magnetic field. When the magnetic field is strong or the chemical potential is large, the proportion of the mixture is determined by the decay constants and the contributions to the anomalous action of ${\pi }^0$ and $\eta$ meson. The resulting configuration is either a mixed soliton lattice or a quasicrystal which could be dubbed a ``chiral soliton quasicrystal''.

   hep-phhep-thnucl-thJHEP(2023)·22 citations
7. 07*

   Investigation of ${\Omega }_{ccb}$ and ${\Omega }_{cbb}$ baryons in Regge phenomenology

   Juhi Oudichhya🇮🇳 · Keval Gandhi🇮🇳 · Ajay kumar Rai🇮🇳

   Triply heavy baryons with quark content $ccb$ and $cbb$ are investigated within the framework of Regge phenomenology. With the assumption of linear Regge trajectories, we have extracted the relations between Regge parameters and baryon masses. Using these relations, we compute the ground state masses of ${\Omega }_{ccb}$ and ${\Omega }_{cbb}$ baryons. Further, the Regge slopes and intercepts are estimated for these baryons to obtain the excited state masses in the $(J,M^2)$ and $(n,M^2)$ planes. \textbf{Also, using the obtained results we calculate the other properties like magnetic moment and radiative decay width of these triply heavy baryons.} We compare our evaluated results with those obtained by the other theoretical approaches, and our results show a general agreement with them. The present study and our predictions will provide significant clues for future experimental research of these unseen triply heavy baryons.

   hep-phPramana(2023)·21 citations
8. 08*

   Configurational information measure of mesonic states in 4-flavor AdS/QCD

   G. Karapetyan🇧🇷 · W. de Paula🇧🇷 · R. da Rocha🇧🇷

   Strange axial-vector kaons, $K_1$, and $f_1$ meson resonances are investigated in the 4-flavor AdS/QCD model. Their underlying differential configurational entropy is computed and the mass spectra of higher-excited resonances, in both these mesonic families, are achieved and discussed. This technique merges the 4-flavor AdS/QCD and experimental data regarding the mass spectrum of $K_1$ and $f_1$ meson resonances that have been already detected and reported in the Particle Data Group, also bringing forth a route to explore physical features of the next generation of resonances in the $K_1$ and $f_1$ meson families.

   hep-phhep-thPLB(2023)·6 citations
9. 09*

   Thermodynamics of a rotating hadron resonance gas with van der Waals interaction

   Kshitish Kumar Pradhan🇮🇳 · Bhagyarathi Sahoo🇮🇳 · Dushmanta Sahu🇮🇳 · Raghunath Sahoo🇮🇳

   Studying the thermodynamics of the systems produced in ultra-relativistic heavy-ion collisions is crucial in understanding the QCD phase diagram. Recently, a new avenue has opened regarding the implications of large initial angular momentum and subsequent vorticity in the medium evolution in high-energy collisions. This adds a new type of chemical potential into the partonic and hadronic systems, called the rotational chemical potential. We study the thermodynamics of an interacting hadronic matter under rotation, formed in an ultra-relativistic collision. We introduce attractive and repulsive interactions through the van der Waals equation of state. Thermodynamic properties like the pressure ($P$), energy density ($\epsilon$), entropy density ($s$), trace anomaly ($(\epsilon -3P)/T^4$), specific heat ($c_{\mathrm{v}}$) and squared speed of sound ($c_{\mathrm{s}}^2$) are studied as functions of temperature ($T$) for zero and finite rotation chemical potential. The conserved charge fluctuations, which can be quantified by their respective susceptibilities, are also studied. The rotational (spin) density corresponding to the rotational chemical potential is explored. In addition, we explore the possible liquid-gas phase transition in the hadron gas with van der Waals interaction in the $T$ -- $\omega$ phase space.

   hep-phhep-exnucl-exnucl-thEPJC(2024)·32 citations
10. 10*

    Solving the domain wall problem with first-order phase transition

    Yang Li🇨🇳 · Ligong Bian🇨🇳 · Yongtao Jia🇨🇳

    Domain wall networks are two-dimensional topological defects generally predicted in many beyond standard model physics. In this Letter, we propose to solve the domain wall problem with the first-order phase transition. We numerically study the phase transition dynamics, and for the first time show that the domain walls reached scaling regime can be diluted through the interaction with vacuum bubbles during the first-order phase transition. We find that the amplitude of the gravitational waves produced by the second-stage first-order phase transition is several orders higher than that from the domain walls evolution in the scaling regime. The scale of the first-order phase transition that dilute the domain walls can be probed through gravitational waves detection.

    hep-phastro-ph.COJCAP(2025)·19 citations
11. 11*

    Is $f_2(1950)$ the tensor glueball?

    Arthur Vereijken🇵🇱 · Shahriyar Jafarzade🇵🇱 · Milena Piotrowska🇵🇱 · Francesco Giacosa🇵🇱

    Glueballs remain an experimentally undiscovered expectation of QCD. Lattice QCD (As well as other theoretical approaches) predicts a spectrum of glueballs, with the tensor ($J^{PC}=2^{++}$) glueball being the second lightest, behind the scalar glueball. Here, using a chiral hadronic model, we compute decay ratios of the tensor glueball into various meson decay channels. We find the tensor glueball to primarily decay into two vector mesons, dominated by $\rho \rho$ and $K^{\ast }{K}^{\ast }$ channels. These results are compared to experimental data of decay rates of isoscalar tensor mesons. Based on this comparison, we make statements on the eligibility of these mesons as potential tensor glueball candidates: the resonance $f_2(1950)$ turns out to be, at present, the best match as being predominantly a tensor glueball.

    hep-phPRD(2023)·18 citations
12. 12*

    Productions of $X(3872)$, $Z_c(3900)$, $X_2(4013)$, and $Z_c(4020)$ in $B_{(s)}$ decays offer strong clues on their molecular nature

    Qi Wu🇨🇳 · Ming-Zhu Liu🇨🇳 · Li-Sheng Geng🇨🇳

    The exotic states $X(3872)$ and $Z_c(3900)$ have long been conjectured as isoscalar and isovector ${\bar{D}}^{\ast }D$ molecules. In this work, we first propose the triangle diagram mechanism to investigate their productions in $B$ decays as well as their heavy quark spin symmetry partners, $X_2(4013)$ and $Z_c(4020)$. We show that the large isospin breaking of the ratio $\mathcal{B}[B^{+}\to X(3872)K^{+}]/\mathcal{B}[B^0\to X(3872)K^0]$ can be attributed to the isospin breaking of the neutral and charged ${\bar{D}}^{\ast }D$ components in their wave functions. For the same reason, the branching fractions of $Z_c(3900)$ in $B$ decays are smaller than the corresponding ones of $X(3872)$ by at least one order of magnitude, which naturally explains its non-observation. A hierarchy for the production fractions of $X(3872)$, $Z_c(3900)$, $X_2(4013)$, and $Z_c(4020)$ in $B$ decays, consistent with all existing data, is predicted. Furthermore, with the factorization ansatz we extract the decay constants of $X(3872)$, $Z_c(3900)$, and $Z_c(4020)$ as ${\bar{D}}^{\ast }{D}^{(\ast )}$ molecules via the $B$ decays, and then calculate their branching fractions in the relevant $B_{(s)}$ decays, which turn out to agree with all existing experimental data. The mechanism we proposed is useful to elucidate the internal structure of the many exotic hadrons discovered so far and to extract the decay constants of hadronic molecules,which can be used to predict their production in related processes.

    hep-phEPJC(2024)·37 citations
13. 13*

    Effects of angular spread in nonlinear Compton scattering

    Ya-Nan Dai🇨🇳 · Jing-Jing Jiang🇨🇳 · Yu-Hang Jiang🇨🇳 · Rashid Shaisultanov🇨🇿 · Yue-Yue Chen🇨🇳

    We investigated the effects of the momentum spread of photon around incoming electrons during nonlinear Compton scattering of an elliptically polarized laser off an ultrarelativistic electron beam. It has been assumed to be a good approximation to neglect the angular spread in the strong-field QED codes considering its smallness in relativistic regime. Here, we scrutinize the validity of this approximation in the nonlinear Compton scattering. For our purpose, we improved the fully electron spin- and photon polarization- resolved Monte Carlo simulation method by employing the angle-resolved probability for high-energy photon emission in ultrastrong laser fields. The quantum operator method introduced by Baier and Katkov is employed for calculation of the probability within the quasiclassical approach and the local constant field approximation. Our simulation shows that the angular spread at emission has notable effects on angular distribution and polarization of out-going particles. The width of angular distributions for electrons and emitted photons are increased by $55\%$ and $22\%$, respectively. Meanwhile, the electrons polarization is reduced by $11\%$ due to the correction of radiation reaction force, while the average polarization of photons is insensitive to the angular spread at emissions.

    hep-phPRD(2023)·7 citations
14. 14*

    $\nu$DoBe -- A Python Tool for Neutrinoless Double Beta Decay

    Oliver Scholer🇩🇪 · Jordy de Vries🇳🇱 · Lukáš Gráf🇺🇸

    We present $\nu$DoBe, a Python tool for the computation of neutrinoless double beta decay ($0\nu \beta \beta$) rates in terms of lepton-number-violating operators in the Standard Model Effective Field Theory (SMEFT). The tool can be used for automated calculations of $0\nu \beta \beta$ rates, electron spectra and angular correlations for all isotopes of experimental interest, for lepton-number-violating operators up to and including dimension 9. The tool takes care of renormalization-group running to lower energies and provides the matching to the low-energy effective field theory and, at lower scales, to a chiral effective field theory description of $0\nu \beta \beta$ rates. The user can specify different sets of nuclear matrix elements from various many-body methods and hadronic low-energy constants. The tool can be used to quickly generate analytical and numerical expressions for $0\nu \beta \beta$ rates and to generate a large variety of plots. In this work, we provide examples of possible use along with a detailed code documentation. The code can be accessed through: GitHub: https://github.com/OScholer/nudobe Online User-Interface: https://nudobe.streamlit.app

    hep-phhep-exnucl-exnucl-thJHEP(2023)·30 citations
15. 15*

    JUNO as a Probe of the Pseudo-Dirac Nature using Solar Neutrinos

    Jack Franklin🇬🇧 · Yuber F. Perez-Gonzalez🇬🇧 · Jessica Turner🇬🇧

    It remains a possibility that neutrinos are pseudo-Dirac states, such that a generation is composed of two maximally mixed Majorana neutrinos separated by a very small mass difference. We explore the physics potential of the JUNO experiment in constraining this possibility using the measurement of solar neutrinos. In particular, we investigate cases where one or three sterile states are present in addition to the active states. We consider two scenarios: one where JUNO's energy threshold allows for the measurement of $pp$ solar neutrinos, and the case where JUNO can only measure ${}^7$Be neutrinos and above. We find that JUNO will be able to constrain pseudo-Dirac mass splittings of $\delta m^2\gtrsim 2.9\times 10^{-13}\mathrm{e}{\mathrm{V}}^2$ for the scenario including $pp$ solar neutrinos, and $\delta m^2\gtrsim 1.9\times 10^{-12}\mathrm{e}{\mathrm{V}}^2$ when the measurement only considers ${}^7$Be monochromatic neutrinos, at the $3\sigma$ C.L. Thus, including $pp$ neutrinos will be crucial for JUNO to improve current constraints on the pseudo-Dirac scenario from solar neutrinos.

    hep-phPRD(2023)·14 citations
16. 16*

    Characterizing quasi-steady states of fast neutrino-flavor conversion by stability and conservation laws

    Masamichi Zaizen🇯🇵 · Hiroki Nagakura🇯🇵

    The question of what ingredients characterize the quasi-steady state of fast neutrino-flavor conversion (FFC) is one of the long-standing riddles in neutrino oscillation. Addressing this issue is necessary for accurate modeling of neutrino transport in core-collapse supernova and binary neutron star merger. Recent numerical simulations of FFC have shown, however, that the quasi-steady state is sensitively dependent on boundary conditions in space, and the physical reason for the dependence is not clear at present. In this study, we provide a physical interpretation of this issue based on arguments with stability and conservation laws. The stability can be determined by the disappearance of ELN(electron neutrino-lepton number)-XLN(heavy-leptonic one) angular crossings, and we also highlight two conserved quantities characterizing the quasi-steady state of FFC: (1) lepton number conservation along each neutrino trajectory and (2) conservation law associated with angular moments, depending on boundary conditions, for each flavor of neutrinos. We present an analytic prescription that matches the results of the nonlinear simulations presented in this work. This study represents a major step forward a unified picture determining asymptotic states of FFCs.

    ↳ astro-ph.HEhep-phPRD(2023)·57 citations
17. 17*

    The Atacama Cosmology Telescope: DR6 Gravitational Lensing Map and Cosmological Parameters

    Mathew S. Madhavacheril🇺🇸 · Frank J. Qu🇬🇧 · Blake D. Sherwin🇬🇧 · Niall MacCrann🇬🇧 · Yaqiong Li🇺🇸 · Irene Abril-Cabezas🇬🇧 · Peter A. R. Ade🇬🇧 · Simone Aiola🇺🇸 · Tommy Alford🇺🇸 · Mandana Amiri🇨🇦 · Stefania Amodeo🇫🇷 · Rui An🇺🇸 and 147 other authors

    We present cosmological constraints from a gravitational lensing mass map covering 9400 sq. deg. reconstructed from CMB measurements made by the Atacama Cosmology Telescope (ACT) from 2017 to 2021. In combination with BAO measurements (from SDSS and 6dF), we obtain the amplitude of matter fluctuations ${\sigma }_8=0.819\pm 0.015$ at 1.8% precision, $S_8\equiv {\sigma }_8({\Omega }_{\mathrm{m}}/0.3{)}^{0.5}=0.840\pm 0.028$ and the Hubble constant $H_0=(68.3\pm 1.1)\text{km}{\text{s}}^{-1}{\text{Mpc}}^{-1}$ at 1.6% precision. A joint constraint with CMB lensing measured by the Planck satellite yields even more precise values: ${\sigma }_8=0.812\pm 0.013$, $S_8\equiv {\sigma }_8({\Omega }_{\mathrm{m}}/0.3{)}^{0.5}=0.831\pm 0.023$ and $H_0=(68.1\pm 1.0)\text{km}{\text{s}}^{-1}{\text{Mpc}}^{-1}$. These measurements agree well with $\Lambda$CDM-model extrapolations from the CMB anisotropies measured by Planck. To compare these constraints to those from the KiDS, DES, and HSC galaxy surveys, we revisit those data sets with a uniform set of assumptions, and find $S_8$ from all three surveys are lower than that from ACT+Planck lensing by varying levels ranging from 1.7-2.1$\sigma$. These results motivate further measurements and comparison, not just between the CMB anisotropies and galaxy lensing, but also between CMB lensing probing $z\sim 0.5-5$ on mostly-linear scales and galaxy lensing at $z\sim 0.5$ on smaller scales. We combine our CMB lensing measurements with CMB anisotropies to constrain extensions of $\Lambda$CDM, limiting the sum of the neutrino masses to $\sum m_{\nu }<0.13$ eV (95% c.l.), for example. Our results provide independent confirmation that the universe is spatially flat, conforms with general relativity, and is described remarkably well by the $\Lambda$CDM model, while paving a promising path for neutrino physics with gravitational lensing from upcoming ground-based CMB surveys.

    ↳ astro-ph.COhep-phApJ(2024)·565 citations
18. 18*

    Photon Chiral Memory Effect Stored on Celestial Sphere

    Azadeh Maleknejad🇨🇭

    This work introduces the chiral memory effect on the celestial sphere that measures the permanent change of electromagnetic fields by spin-dependent processes in bulk. Unlike the conventional memory effect based on the permanent soft shift in the gauge field itself, it is a permanent change in its spin angular momentum. The concept underlying the chiral memory (conventional memory) effect is optical spin torque (optical force) induction in bulk. Photons and EM radiation carry angular momentum, which is conserved without interactions. Chiral interactions with matter, medium, curvature, and theories with parity violation, i.e., axion-QED, transfers spin angular momentum to EM fields. In nature, such phenomena occur either on EM radiation (chiral memory) or in the vacuum of QED (vacuum chiral memory). It can be parametrized in terms of the photon's topological (axial) current at null infinity. To elude the gauge ambiguity of the topological current, we use the transverse gauge and show it is the physical part of the current suggested by its cohomology structure.

    ↳ hep-thgr-qchep-phJHEP(2023)·16 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.