Tue·Jan 9, 2018Tuesday·January 9, 2018

1. 01*

   The high energy fate of the minimal Goldstone Higgs

   Helene Gertov (Southern Denmark U., CP3-Origins & U. Southern Denmark, Odense, DIAS)🇩🇰 · Sofie Gregersen (Southern Denmark U., CP3-Origins & U. Southern Denmark, Odense, DIAS)🇩🇰 · Francesco Sannino (Southern Denmark U., CP3-Origins & U. Southern Denmark, Odense, DIAS)🇩🇰 · Kimmo Tuominen (Helsinki U. & Helsinki Inst. of Phys.)🇫🇮

   We consider a minimal model where the Higgs boson arises as an elementary pseudo-Nambu-Goldstone boson. The model is based on an extended scalar sector with global SO(5)/SO(4) symmetry. To achieve the correct electroweak symmetry breaking pattern, the model is augmented either with an explicit symmetry breaking term or an extra singlet scalar field. We consider separately both of these possibili- ties. We fit the model with the known particle spectrum at the electroweak scale and extrapolate to high energies using renormalization group. We find that the model can remain stable and perturbative up to the Planck scale provided that the heavy beyond Standard Model scalar states have masses in a narrow interval around 3 TeV.

   hep-phPRD(2018)·0 citations
2. 02*

   Phenomenology of ${\Xi }_b\to {\Xi }_c\tau \nu$ decays

   Rupak Dutta🇮🇳

   Deviations from the standard model prediction have been reported in various semileptonic $B$ decays mediated via $b\to c$ charged current interactions. In this context, we analyze semileptonic baryon decays ${\Xi }_b\to {\Xi }_c\tau \nu$ using the helicity formalism. We report numerical results on various observables such as the decay rate, ratio of branching ratio, lepton side forward backward asymmetries, longitudinal polarization fraction of the lepton, and the convexity parameter for this decay mode using results of relativistic quark model. We also provide an estimate of the new physics effect on these observables under various new physics scenarios.

   hep-phPRD(2018)·22 citations
3. 03*

   Axion Detection via Atomic Excitations

   J.D. Vergados (1,3)🇰🇷 · F.T. Avignone III (2)🇺🇸 · S. Cohen (1)🇬🇷 · R. J. Creswick (2) ((1) University of Ioannina, Greece, (2) University of South Carolina, (3) Center for Axion and Precision Physics Research, Daejeon, Republic of Korea)🇺🇸

   The possibility of axion detection by observing axion induced atomic excitations as suggested by Sikivie is discussed. The atom is cooled at low temperature and it is chosen to posses three levels. The first is the ground state, the second is completely empty chosen so that the energy difference between the two is close to the axion mass. Under the spin induced axion-electron interaction an electron is excited from the first to the second level. The presence of such an electron there can be confirmed by exciting it further via radiation of a suitably chosen photon energy to the appropriately selected third level, which is also empty, and lies at a higher excitation energy. From the observation of its subsequent de-excitation one infers the presence of the axion. The system is in a magnetic field so that the energies involved can be suitably adjusted. Since the axion is absorbed by the atom the cross section exhibits resonance behavior. Using an axion-electron coupling indicated by the limit obtained by the Borexino experiment, reasonable axion absorption rates have been obtained for various atomic targets.

   hep-ph17 citations
4. 04*

   Properties of ${\Sigma }_Q^{\ast }$, ${\Xi }_Q^{\ast }$ and ${\Omega }_Q^{\ast }$ heavy baryons in cold nuclear matter

   K. Azizi🇹🇷 · N. Er🇹🇷

   The in-medium properties of the heavy spin-3/2 ${\Sigma }_Q^{\ast }$, ${\Xi }_Q^{\ast }$ and ${\Omega }_Q^{\ast }$ baryons with $Q$ being $b$ or $c$ quark are investigated. The shifts in some spectroscopic parameters of these particles due to the saturated cold nuclear matter are calculated. The variations of those parameters with respect to the changes in the density of the cold nuclear medium are studied, as well. It is observed that the parameters of ${\Sigma }_Q^{\ast }$ baryons are considerably affected by the nuclear matter compared to the ${\Xi }_Q^{\ast }$ and ${\Omega }_Q^{\ast }$ particles that roughly do not see the medium. The results obtained may be used in analyses of the data to be provided by the in-medium experiments like PANDA.

   hep-phhep-exhep-latnucl-thNPA(2018)·12 citations
5. 05*

   Neutral and charged (pseduo)scalar mesons and diquarks under magnetic fields

   Hao Liu🇨🇳 · Xinyang Wang🇨🇳 · Lang Yu🇨🇳 · Mei Huang🇨🇳

   We investigate both (pseudo)scalar mesons and diquarks in the presence of external magnetic field in the framework of the two-flavored Nambu--Jona-Lasinio (NJL) model, where mesons and diquarks are constructed by infinite sum of quark-loop chains by using random phase approximation. The polarization function of the quark-loop is calculated to the leading order of $1/N_c$ expansion by taking the quark propagator in the Landau level representation. We systematically investigate the masses behaviors of scalar $\sigma$ meson, neutral and charged pions as well as the scalar diquarks, with respect to the magnetic field strength at finite temperature and chemical potential. It is shown that the numerical results of both neutral and charged pions are consistent with the lattice QCD simulations. The mass of the charge neutral pion keeps almost a constant under the magnetic field, which is preserved by the remnant symmetry of QCD$\times$QED in the vacuum. The mass of the charge neutral scalar $\sigma$ is around two times quark mass and increases with the magnetic field due to the magnetic catalysis effect, which is an typical example showing that the polarized internal quark structure cannot be neglected when we consider the meson properties under magnetic field. For the charged particles, the one quark-antiquark loop contribution to the charged ${\pi }^{\pm }$ increases essentially with the increase of magnetic fields due to the magnetic catalysis of the polarized quarks. However, the one quark-quark loop contribution to the scalar diquark mass is negative comparing with the point-particle result and the loop effect is small.

   hep-phPRD(2018)·73 citations
6. 06*

   $\eta$ and ${\eta }^{\prime }$ photoproduction with EtaMAID including Regge phenomenology

   V.L. Kashevarov🇩🇪 · L. Tiator🇩🇪 · M. Ostrick🇩🇪

   We present a new version of the EtaMAID model for $\eta$ and ${\eta }^{\prime }$ photoproduction on nucleons. The model includes 23 nucleon resonances parameterized with Breit-Wigner shapes. The background is described by vector and axial-vector meson exchanges in the $t$ channel using the Regge cut phenomenology. Parameters of the resonances were obtained from a fit to available experimental data for $\eta$ and ${\eta }^{\prime }$ photoproduction on protons and neutrons. The nature of the most interesting observations in the data is discussed.

   hep-phnucl-exnucl-thBled Workshops Phys.(2017)·1 citation
7. 07*

   Computing radiative corrections in four dimensions

   Roberto Pittau🇪🇸

   I comment and summarize the principles underlying the Four Dimensional Regularization/Renormalization (FDR) approach to the UV and IR infinities. A few recent results are also reviewed.

   hep-phhep-thActa Phys.Polon.Supp.(2018)·2 citations
8. 08*

   Calculation of the R-ratio of $e^{+}{e}^{-}\to$ hadrons at the higher-loop levels

   A.V.Nesterenko🇷🇺

   The calculation of the R-ratio of electron-positron annihilation into hadrons is discussed. The method, which enables one to properly account for all the effects due to continuation of the spacelike perturbative results into the timelike domain at an arbitrary loop level, is delineated.

   hep-phhep-ex0 citations
9. 09*

   One-loop evolution of parton pseudo-distribution functions on the lattice

   Anatoly Radyushkin🇺🇸

   We incorporate recent calculations of one-loop corrections for the reduced Ioffe-time pseudo-distribution $\mathfrak{M}(\nu ,z_3^2)$ to extend the leading-logarithm analysis of lattice data obtained by Orginos et al. We observe that the one-loop corrections contain a large term reflecting the fact that effective distances involved in the most important diagrams are much smaller than the nominal distance $z_3$. The large correction in this case may be absorbed into the evolution term, and the perturbative expansion used for extraction of parton densities at the $\mu \approx 2$ GeV scale is under control. The extracted parton distribution is rather close to global fits in the $x>0.1$ region, but deviates from them for $x<0.1$.

   hep-phhep-latPRD(2018)·103 citations
10. 10*

    Investigation of the energy dependence of the pT0 parameter in the Pythia 8 Monte Carlo event generator

    Paolo Gunnellini🇩🇪 · Hannes Jung🇩🇪 · Rachalis Maharucksit🇹🇭

    By using predictions from the Pythia 8 Monte Carlo event generator, we determine the energy-dependent turn-over values (pT0) of the partonic cross section for the simulation of multiparton interactions. Since the observed energy dependence of the pT0 values is not well described by a power-law function, we introduce an additional energy-dependent term, to better describe the experimental observations in the energy range sqrt(s) = 0.3-13 TeV. We obtain a similar level of agreement for predictions using various parton densities.

    hep-phEPJC(2018)·7 citations
11. 11*

    Capability of future linear colliders to discover heavy neutral CP-even and CP-odd Higgs bosons within Type-I 2HDM

    Majid Hashemi (1)🇮🇷 · Gholamhossein Haghighat (1) ((1) Physics Department, College of Sciences, Shiraz University, Shiraz, Iran)🇮🇷

    In this study, assuming the type-I 2HDM at SM-like scenario, observability of heavy neutral CP-even and CP-odd Higgs bosons $H$ and $A$ at a linear collider operating at $\sqrt{s}=1$ TeV is investigated through the signal process chain $e^{-}{e}^{+}\to AH\to ZHH$ where the $Z$ boson experiences a leptonic ($e^{-}{e}^{+}$ or ${\mu }^{-}{\mu }^{+}$) decay and the $H$ Higgs boson is assumed to decay into a di-photon. This signal process is motivated especially by the clean signature which leptonic and photonic events can provide at colliders, and also by the enhancement due to the charged Higgs-mediated contribution to $H$ di-photon decay at large $\tan \beta$ values. Simulation is based on four benchmark points according to which the Higgs mass $m_H$ ($m_A$) varies within the range $150$-$300$ ($200$-$400$) GeV. Energy smearing of jets and photons are performed, and momentum smearing is also applied to leptons. Results indicate that, for all of the assumed benchmark points, the Higgs bosons $H$ and $A$ are observable with measurable masses, and with signals exceeding $5\sigma$ at integrated luminosities $111$ and $201f{b}^{-1}$ respectively. Such luminosities are easily accessible to future linear colliders.

    hep-phJ.Phys.G(2018)·4 citations
12. 12*

    Unraveling the couplings of a Drell-Yan produced $Z^{\prime }$ with heavy-flavor tagging

    Wei-Shu Hou🇹🇼 · Masaya Kohda🇹🇼 · Tanmoy Modak🇹🇼

    Despite no new physics so far at the LHC, a $Z^{\prime }$ boson with $m_{Z^{\prime }}\sim 100$ GeV could still emerge via Drell-Yan (DY) production, $q\bar{q}\to Z^{\prime }\to {\mu }^{+}{\mu }^{-}$, in the next few years. To unravel the nature of the $Z^{\prime }$ coupling, we utilize the $c$- and $b$-tagging algorithms developed by ATLAS and CMS to investigate $cg\to c{Z}^{\prime }$ at 14 TeV LHC. While light-jet contamination can be eliminated, mistagged $b$-jets cannot be rejected in any of the tagging schemes we adopt. On the other hand, for nonzero $bb{Z}^{\prime }$ coupling, far superior $b$-tagging could discover the $bg\to b{Z}^{\prime }$ process, where again light-jet mistag can be ruled out, but mistagged $c$-jets cannot yet be excluded. Provided that DY production is discovered soon enough, we find that a simultaneous search for $cg\to c{Z}^{\prime }$ and $bg\to b{Z}^{\prime }$ can conclusively discern the nature of $Z^{\prime }$ couplings involved.

    hep-phPRD(2018)·10 citations
13. 13*

    Simplicity from Recoil: The Three-Loop Soft Function and Factorization for the Energy-Energy Correlation

    Ian Moult🇺🇸 · Hua Xing Zhu🇨🇳

    We derive an operator based factorization theorem for the energy-energy correlation (EEC) observable in the back-to-back region, allowing the cross section to be written as a convolution of hard, jet and soft functions. We prove the equivalence of the soft functions for the EEC and color singlet transverse-momentum resummation to all-loop order, and give their analytic result to three-loops. Large logarithms appearing in the perturbative expansion of the EEC can be resummed to all orders using renormalization group evolution. We give analytic results for all required anomalous dimensions to three-loop order, providing the first example of a transverse-momentum (recoil) sensitive $e^{+}{e}^{-}$ event shape whose anomalous dimensions are known at this order. The EEC can now be computed to next-to-next-to-next-to-leading logarithm matched to next-to-next-to-leading order, making it a prime candidate for precision QCD studies and extractions of the strong coupling constant. We anticipate that our factorization theorem will also be crucial for understanding non-perturbative power corrections for the EEC, and their relationship to those appearing in other observables.

    hep-phhep-thnucl-thJHEP(2018)·153 citations
14. 14*

    Exotic Sterile Neutrinos and Pseudo-Goldstone Phenomenology

    Bibhushan Shakya🇺🇸 · James D. Wells🇺🇸

    We study the phenomenology of a light (GeV scale) sterile neutrino sector and the pseudo-Goldstone boson (not the majoron) associated with a global symmetry in this sector that is broken at a high scale. Such scenarios can be motivated from considerations of singlet fermions from a hidden sector coupling to active neutrinos via heavy right-handed seesaw neutrinos, effectively giving rise to a secondary, low-energy seesaw framework. Such scenarios allow for rich phenomenology with observable implications for cosmology, dark matter, and direct searches, involving novel sterile neutrino dark matter production mechanisms from the pseudo-Goldstone-mediated scattering or decay, modifications of BBN bounds on sterile neutrinos, suppression of canonical sterile neutrino decay channels at direct search experiments, late injection of an additional population of neutrinos in the Universe after neutrino decoupling, and measurable dark radiation at BBN or CMB decoupling.

    hep-phastro-ph.COJHEP(2019)·23 citations
15. 15*

    Aspects of Domain-Wall Standard Model

    Nobuchika Okada🇺🇸 · Digesh Raut🇺🇸 · Desmond Villalba🇺🇸

    We have recently proposed a setup of the "Domain-Wall Standard Model" in a non-compact 5-dimensional space-time, where all the Standard Model (SM) fields are localized in certain domains of the 5th dimension. While the SM is realized as a 4-dimensional effective theory at low energies, the model involves Kaluza-Klein (KK) modes of the SM particles. In this paper we introduce two simple solvable examples which lead to domain-wall configurations for the SM particles and their KK-modes. Based on the examples, we address a variety of phenomenologies of the Domain-Wall SM, such as the KK-mode gauge boson phenomenology at the Large Hadron Collider (LHC), the effect of the KK-mode SM fermions on Higgs boson phenomenology, and the KK-mode fermion search at the LHC with its decay into a corresponding SM fermion and a Nambu-Goldstone boson associated with a spontaneous breaking of the translational invariance in the 5th dimension. We also propose a simple unified picture of localizing all the SM fields.

    hep-phhep-thPTEP(2024)·8 citations
16. 16*

    Constraining the speed of sound inside neutron stars with chiral effective field theory interactions and observations

    Ingo Tews🇺🇸 · Joseph Carlson🇺🇸 · Stefano Gandolfi🇺🇸 · Sanjay Reddy🇺🇸

    The dense matter equation of state (EOS) determines neutron star (NS) structure but can be calculated reliably only up to one to two times the nuclear saturation density, using accurate many-body methods that employ nuclear interactions from chiral effective field theory constrained by scattering data. In this work, we use physically motivated ansatzes for the speed of sound $c_S$ at high density to extend microscopic calculations of neutron-rich matter to the highest densities encountered in stable NS cores. We show how existing and expected astrophysical constraints on NS masses and radii from X-ray observations can constrain the speed of sound in the NS core. We confirm earlier expectations that $c_S$ is likely to violate the conformal limit of $c_S^2\le c^2/3$, possibly reaching values closer to the speed of light $c$ at a few times the nuclear saturation density, independent of the nuclear Hamiltonian. If QCD obeys the conformal limit, we conclude that the rapid increase of $c_S$ required to accommodate a $2$ M${}_{\odot }$ NS suggests a form of strongly interacting matter where a description in terms of nucleons will be unwieldy, even between one and two times the nuclear saturation density. For typical NSs with masses in the range $1.2-1.4$ M${}_{\odot }$, we find radii between $10$ and $14$ km, and the smallest possible radius of a $1.4$ M${}_{\odot }$ NS consistent with constraints from nuclear physics and observations is $8.4$ km. We also discuss how future observations could constrain the EOS and guide theoretical developments in nuclear physics.

    ↳ nucl-thhep-phApJ(2018)·471 citations
17. 17*

    Variational and Dyson--Schwinger Equations of Hamiltonian Quantum Chromodynamics

    Davide Campagnari🇩🇪 · Hugo Reinhardt🇩🇪

    The variational Hamiltonian approach to Quantum Chromodynamics in Coulomb gauge is investigated within the framework of the canonical recursive Dyson--Schwinger equations. The dressing of the quark propagator arising from the variationally determined non-perturbative kernels is expanded and renormalized at one-loop order, yielding a chiral condensate compatible with the observations.

    ↳ hep-thhep-phPRD(2018)·9 citations
18. 18*

    Extracting nuclear form factors with coherent neutrino scattering

    Emilio Ciuffoli🇨🇳 · Jarah Evslin🇨🇳 · Qiang Fu🇨🇳 · Jian Tang🇨🇳

    Coherent elastic neutrino-nucleus scattering (CEvNS) can be used to determine the neutron part of nuclear form factors, unlocking intrinsic properties of nuclear structure. In contrast with other such methods, CEvNS is free from both strong interaction effects and Coulomb distortions. We propose precision measurements of CEvNS with an upcoming accelerator facility and determine the corresponding requirements for such a neutrino detector. We find that most significant backgrounds come from fast neutrons, induced by cosmogenic muons or from the pion decays at rest in the target station. With ton-scale liquid noble gas detectors, we will not only achieve percent level precision in the measurement of neutron radii but also clarify contributions of higher-order moments to nuclear form factors.

    ↳ physics.ins-dethep-exhep-phPRD(2018)·46 citations
19. 19*

    Screams for Explanation: Finetuning and Naturalness in the Foundations of Physics

    S. Hossenfelder🇩🇪

    We critically analyze the rationale of arguments from finetuning and naturalness in particle physics and cosmology. Some other numerological coincidences are also discussed.

    ↳ physics.hist-phgr-qchep-phhep-thSynthese(2021)·59 citations
20. 20*

    Constraints on brane inflation after Planck 2015: Impacts of the latest local measurement of the Hubble constant

    Rui-Yun Guo🇨🇳 · Lei Zhang🇨🇳 · Jing-Fei Zhang🇨🇳 · Xin Zhang🇨🇳

    We investigate the observational constraints on three typical brane inflation models by considering the latest local measurement of the Hubble constant in the global fit. We also employ other observational data, including the Planck 2015 CMB data, the BICEP2/Keck Array B-mode data, and the baryon acoustic oscillations data, in our analysis. Previous studies have shown that the addition of the latest local $H_0$ measurement favors a larger spectral index, and can exert a significant influence on the model selection of inflation. In this work, we investigate its impacts on the status of brane inflation models. We find that, when the direct $H_0$ measurement is considered, the prototype model of brane inflation is still in good agreement with the current observational data within the $2\sigma$ level range. For the KKLMMT model, the consideration of the $H_0$ measurement allows the range of the parameter $\beta$ to be amplified to $\mathcal{O}(10^{-2})$, which slightly alleviates the fine-tuning problem. For the IR DBI model, the addition of the $H_0$ measurement does not provide a better fit. These results show that the consideration of the new $H_0$ prior can exert a considerable influence on the brane inflation models. At last, we show that, when $\beta \lesssim 1.1$, the equilateral non-Gaussianity in the IR DBI inflation model is compatible with the current CMB data at the 1$\sigma$ level.

    ↳ astro-ph.COgr-qchep-phSCPMA(2019)·14 citations
21. 21*

    The hydrogen atom in $D=3-2ϵ$ dimensions

    Gregory S. Adkins🇺🇸

    The nonrelativistic hydrogen atom in $D=3-2ϵ$ dimensions is the reference system for perturbative schemes used in dimensionally regularized nonrelativistic effective field theories to describe hydrogen-like atoms. Solutions to the $D$-dimensional Schrödinger-Coulomb equation are given in the form of a double power series. Energies and normalization integrals are obtained numerically and also perturbatively in terms of $ϵ$. The utility of the series expansion is demonstrated by the calculation of the divergent expectation value $⟨(V^{\prime }{)}^2⟩$.

    ↳ quant-phhep-phPLA(2018)·6 citations
22. 22*

    Effect of simulating parity-odd observables in high energy heavy ion collisions on Balance Functions of charged particles and elliptic flow of pions

    Sk Noor Alam🇮🇳 · Subhasis Chattopadhyay🇮🇳

    At the early stage of heavy ion collisions, non-trivial topologies of the gauge fields can be created resulting in an imbalance of axial charge density and eventually separation of electric charges along the direction of the magnetic field produced in such collisions. This process is called the chiral magnetic effect (CME). In this work we implement such a charge separation at the partonic level in AMPT for Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV to study its consequence on experimental observables. We present the effects on the pion elliptic flow ($v_2$) and the charged particle balance function (BF) for varying strengths of initial charge separation. We find that the shape of the balance function is sensitive to the increasing charge separation. $v_2$ of pion shows a strong decreasing trend at higher transverse momenta ($p_T$) with increasing charge separation. Charge balance functions show a peak at $\Delta \varphi \sim 180$ with charge separation implemented in the partonic level as expected for the parity violation. We have also calculated parity observable $\gamma$ in the form of BF's moments. $\gamma$ shows a decreasing trend with charge separation. It has a negative value for charge separation produced by flipping more than 30 $\%$ of quarks in the parton level. We also notice that $<\gamma >$ for the same charge correlation and the opposite charge correlation shows negative and positive values, respectively.

    ↳ nucl-thhep-phNPA(2018)·3 citations
23. 23*

    Dark Energy Constraints in light of Pantheon SNe Ia, BAO, Cosmic Chronometers and CMB Polarization and Lensing Data

    Deng Wang🇨🇳

    To explore whether there is new physics going beyond the standard cosmological model or not, we constrain seven cosmological models by combining the latest and largest Pantheon Type Ia supernovae sample with the data combination of baryonic acoustic oscillations, cosmic microwave background radiation, Planck lensing and cosmic chronometers. We find that a spatially flat universe is preferred in the framework of $\Lambda$CDM cosmology, that the constrained equation of state of dark energy is very consistent with the cosmological constant hypothesis, that there is no evidence of dynamical dark energy, that there is no hint of interaction between dark matter and dark energy in the dark sector of the universe, and that there does not exist the sterile neutrinos in the neutrino sector of the universe. We also give the 95$\%$ limit of the total mass of three active neutrinos $\Sigma m_{\nu }<0.178$ eV. It is clear that there is no any departure from the standard cosmological model based on current observational datasets.

    ↳ astro-ph.COastro-ph.HEgr-qchep-phPRD(2018)·23 citations
24. 24*

    Non-Thermal Cosmic Rays During Big Bang Nucleosynthesis to Solve the Lithium Problem

    Ming-Ming Kang🇨🇳 · Yang Hu🇨🇳 · Hong-Bo Hu🇨🇳 · Shou-Hua Zhu🇨🇳

    The discrepancy between the theoretical prediction of primordial lithium abundances and astronomical observations is called the Lithium Problem. We find that extra contributions from non-thermal hydrogen and helium during Big Bang nucleosynthesis can explain the discrepancy, for both Li-7 and Li-6, and will change the deuterium abundance only little. The allowed parameter space of such an amount of non-thermal particles and the energy range is shown. The hypothesis is stable regardless of the cross-section uncertainty of relevant reactions and the explicit shape of the energy spectrum.

    ↳ astro-ph.COhep-phApJ(2019)·4 citations
25. 25*

    Localized non-Abelian gauge fields in non-compact extra-dimensions

    Masato Arai🇯🇵 · Filip Blaschke🇨🇿 · Minoru Eto🇯🇵 · Norisuke Sakai🇯🇵

    Dynamical localization of non-Abelian gauge fields in non-compact flat $D$ dimensions is worked out. The localization takes place via a field-dependent gauge kinetic term when a field condenses in a finite region of spacetime. Such a situation typically arises in the presence of topological solitons. We construct four-dimensional low-energy effective Lagrangian up to the quadratic order in a universal manner applicable to any spacetime dimensions. We devise an extension of the $R_{\xi }$ gauge to separate physical and unphysical modes clearly. Out of the D-dimensional non-Abelian gauge fields, the physical massless modes reside only in the four-dimensional components, whereas they are absent in the extra-dimensional components. The universality of non-Abelian gauge charges holds due to the unbroken four-dimensional gauge invariance. We illustrate our methods with models in $D=5$ (domain walls), in $D=6$ (vortices), and in $D=7$.

    ↳ hep-thhep-phPTEP(2018)·11 citations
26. 26*

    Scientific and personal recollections of Roberto Petronzio

    Giorgio Parisi🇮🇹

    This paper aims to recall some of the main contributions of Roberto Petronzio to physics, with a particular regard to the period we have been working together. His seminal contributions cover an extremely wide range of topics: the foundation of the perturbative approach to QCD, various aspects of weak interaction theory, from basic questions (e.g. the mass of the Higgs) to lattice weak interaction, lattice QCD from the beginning to most recent computations.

    ↳ physics.hist-phhep-lathep-phhep-thEPJ Web Conf.(2018)·1 citation

* 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.