Wed·Nov 24, 2021Wednesday·November 24, 2021

1. 01*

   Neutrino-(anti)neutrino forward scattering potential for massive neutrinos at low energies

   Pedro Dedin Neto🇧🇷 · Ernesto Kemp🇧🇷

   In this work, we calculate expression for the potential due to neutrino-(anti)neutrino forward scattering at low energies ($E<<m_{Z^0}$) for ultra-relativistic massive neutrinos ($E>>m_{\nu }$), a representative regime within astrophysical scenarios. There is a broadly used expression for this potential in the literature, which, however, lacks an explicit derivation from basic principles of quantum field theory. Therefore, this paper has the intention to guide the reader through the steps and concepts to derive this potential, trying to be clear and pedagogical. Moreover, we used a rigorous approach concerning the massive nature of the neutrinos, using massive quantized neutrino fields throughout the entire process, while the usual approach is to consider massless neutrino fields at the interaction. In this context, we explicitly show the validity of the massless neutrino fields approximation at the ultra-relativistic regime, as expected. As the last step, we connect the potential expression to the density matrix formalism, which is a usual framework for works considering neutrino-neutrino interactions. We also discuss some theoretical details through the paper, such as the normal ordering of quantum operators and the implications of massive fields in the neutrino state at its production.

   hep-phastro-ph.HEMod.Phys.Lett.A(2022)·4 citations
2. 02*

   One-loop electroweak radiative corrections to polarized $e^{+}{e}^{-}\to \gamma Z$ process

   S. Bondarenko (1,2)🇷🇺 · Ya. Dydyshka (3,4)🇷🇺 · L. Kalinovskaya (3)🇷🇺 · L. Rumyantsev (3)🇷🇺 · R. Sadykov (3)🇷🇺 · V. Yermolchyk (3,4) ((1) Bogoliubov Laboratory of Theoretical Physics, JINR, Dubna, Moscow region, Russia, (2) Dubna State University, Dubna, Russia (3) Dzhelepov Laboratory of Nuclear Problems, JINR, Dubna, Moscow region, Russia, (4) Institute for Nuclear Problems, Belarusian State University, Minsk, Belarus)🇷🇺

   This paper gives high-precision theoretical predictions for cross sections of the process $e^{+}{e}^{-}\to \gamma Z$ for future electron-positron colliders. The calculations are performed using the SANC system. They include complete one-loop electroweak radiative corrections, as well as longitudinal polarization of the initial state. Numerical results are given for the center-of-mass system energy range $\sqrt{s}=250-1000$ GeV with various polarization degrees in the $\alpha (0)$ and $G_{\mu }$ EW schemes. This study is a contribution to the research program of the CEPC project being under development in China.

   hep-ph2 citations
3. 03*

   Neutrino mass spectrum: Present indication and future prospect

   Son Cao🇻🇳 · N. T. Hong Van🇻🇳 · T. V. Ngoc🇻🇳 · P. T. Quyen🇻🇳

   The fact that neutrinos are massive has been the most crucial evidence of physics beyond the Standard Model of elementary particles. To date, we still do not know how neutrinos get mass and why their mass is much smaller than that of their charged fermion cousins. The precise determination of the neutrino mass spectrum has become one of the central tasks of neutrino physics, providing critical input for understanding the nature of neutrino mass and extending our model. The present landscape of the neutrino mass spectrum is reviewed and explored in this article using data from the neutrino oscillation, cosmology, and beta decay. In addition, we discuss the possibility of relevant programs elucidating the neutrino mass spectrum in the coming decades.

   hep-phhep-exSymmetry(2022)·4 citations
4. 04*

   A close look on 2-3 mixing angle with DUNE in light of current neutrino oscillation data

   Sanjib Kumar Agarwalla🇮🇳 · Ritam Kundu🇮🇳 · Suprabh Prakash🇮🇳 · Masoom Singh🇮🇳

   Recent global fit analyses of oscillation data show a preference for normal mass ordering (NMO) at 2.5$\sigma$ and provide 1.6$\sigma$ indications for lower ${\theta }_{23}$ octant and leptonic CP violation. A high-precision measurement of ${\theta }_{23}$ is pivotal to convert these hints into discoveries. In this work, we study in detail the capabilities of DUNE to establish the deviation from maximal ${\theta }_{23}$ and to resolve its octant at high confidence levels. We exhibit the possible correlations and degeneracies among ${\sin }^2{\theta }_{23}$, $\Delta m_{31}^2$, and ${\delta }_{CP}$ in disappearance and appearance oscillation channels at the probability and event levels. Introducing for the first time, a bi-events plot in the plane of total $\nu$ and $\bar{\nu }$ disappearance events, we discuss the impact of ${\sin }^2{\theta }_{23}$ - $\Delta m_{31}^2$ degeneracy in establishing non-maximal ${\theta }_{23}$ and show how this degeneracy can be resolved by exploiting the spectral shape information in $\nu$ and $\bar{\nu }$ disappearance events. A 3$\sigma$ (5$\sigma$) determination of non-maximal ${\theta }_{23}$ is possible in DUNE in total 7 years if ${\sin }^2{\theta }_{23}\lesssim 0.465(0.450)$ or ${\sin }^2{\theta }_{23}\gtrsim 0.554(0.572)$ for any value of ${\delta }_{CP}$ and NMO. We study the individual contributions from appearance and disappearance channels, impact of systematic uncertainties and marginalization over oscillation parameters, importance of spectral analysis and data from both $\nu$ and $\bar{\nu }$ runs, while analyzing DUNE's sensitivity to establish non-maximal ${\theta }_{23}$. DUNE can resolve the octant of ${\theta }_{23}$ at 4.2$\sigma$ (5$\sigma$) using 7 (10) years of run assuming ${\sin }^2{\theta }_{23}$ = 0.455, ${\delta }_{CP}$ = $223^{\circ }$, and NMO. DUNE can improve the current relative 1$\sigma$ precision on ${\sin }^2{\theta }_{23}$ ($\Delta m_{31}^2$) by a factor of 4.4 (2.8) using 7 years of run.

   hep-phhep-exphysics.ins-detJHEP(2022)·16 citations
5. 05*

   QCD factorization for the four-body leptonic $B$-meson decays

   Chao Wang🇨🇳 · Yu-Ming Wang🇨🇳 · Yan-Bing Wei🇨🇳

   Employing the QCD factorization formalism we compute $B_u^{-}\to {\gamma }^{\ast }\ell {\bar{\nu }}_{\ell }$ form factors with an off-shell photon state possessing the virtuality of order $m_b{\Lambda }_{\mathrm{QCD}}$ and $m_b^2$, respectively, at next-to-leading order in QCD. Perturbative resummation for the enhanced logarithms of $m_b/{\Lambda }_{\mathrm{QCD}}$ in the resulting factorization formulae is subsequently accomplished at next-to-leading logarithmic accuracy with the renormalization-group technique in momentum space. In particular, we derive the soft-collinear factorization formulae for a variety of the subleading power corrections to the exclusive radiative $B_u^{-}\to {\gamma }^{\ast }{W}^{\ast }$ form factors with a hard-collinear photon at $\mathcal{O}({\alpha }_s^0)$. We further construct the complete set of the angular observables governing the full differential distribution of the four-body leptonic decays $B_u^{-}\to {\ell }^{\prime }{\bar{\ell }}^{\prime }\ell {\bar{\nu }}_{\ell }$ with $\ell ,{\ell }^{\prime }\in \{e,\mu \}$ and then perform an exploratory phenomenological analysis for a number of decay observables accessible at the LHCb and Belle II experiments, with an emphasis on the systematic uncertainties arising from the shape parameters of the leading-twist $B$-meson light-cone distribution amplitude in heavy quark effective theory.

   hep-phhep-exhep-latJHEP(2022)·33 citations
6. 06*

   Model Characterization and Dark Matter in the Secluded $U(1{)}^{\prime }$ Model

   Yaşar Hiçyılmaz🇹🇷 · Levent Selbuz🇹🇷 · Levent Solmaz🇹🇷 · Cem Salih Ün🇹🇷

   We consider a class of $U(1{)}^{\prime }$-extended MSSM in which the $U(1{)}^{\prime }$ symmetry is broken by vacuum expectation values (VEVs) of four MSSM singlet fields. While one MSSM singlet field interacts with the MSSM Higgs fields, three of them interact only with each other in forming a secluded sector. Assigning universal $U(1{)}^{\prime }$ charges for three families, the anomaly cancellation condition requires exotic fields which are assumed to be heavy and decoupled. We discuss a variety of $U(1{)}^{\prime }$ charge assignments and anomaly cancellation, $Z^{\prime }/Z$ hierarchy, neutralinos, charginos and the Higgs sector. We find that the typical spectra involve two CP-odd Higgs bosons lighter than about 200 GeV and 600 GeV respectively, which are mostly formed by the MSSM singlet fields. If the relic density of dark matter is saturated only by a neutralino, compatible solutions predict LSP neutralinos formed by the MSSM singlet fields in the mass scales below about 600 GeV, while it is possible to realize MSSM neutralino LSP above these mass scales. One can classify the implications in three scenarios. Scenario I involves NLSP charginos, while Scenario II involves charginos which do not participate coannihilation processes with the LSP neutralino. These two scenarios predict MSSM singlet LSP neutralinos, while Scenario I leads to larger scattering cross-sections of dark matter. Scenario III has the solutions in which the MSSM neutralinos are considerably involved in LSP decomposition which yields very large scattering cross-section excluded by the direct detection experiments.

   hep-phPRD(2022)·7 citations
7. 07*

   CP-Violation in the 3-Higgs Doublet Model: CP-Asymmetries from Charged Higgs Bosons and Electric Dipole Moments

   Andrew G. Akeroyd🇬🇧 · Heather E. Logan🇨🇦 · Stefano Moretti🇬🇧 · Diana Rojas-Ciofalo🇵🇱 · Tetsuo Shindou🇯🇵 · Muyuan Song🇬🇧

   We propose a CP-violating source in the charged Higgs sector of a 3-Higgs Doublet Model (3HDM) that will contribute to three CP-asymmetry observables for low energy processes. In the context of such a 3HDM, a measurement of one of the specific asymmetry observables (i.e., $\bar{B}\to X_{s+d}\gamma$) could obtain up to 2.5% or more, which would give a 5$\sigma$ evidence for physics Beyond the SM (BSM) from the full BELLE II data set. In addition to these CP-violating observables, the current measurements of Electron Dipole Moments (EDMs) constrain the available parameter region of the CP-violating 3HDM. In this work, we perform a thorough analysis of the parameter space of it to find the regions that satisfy EDMs, $\bar{B}\to X_s\gamma$, direct collider searches for charged Higgs bosons as well as theoretical bounds.

   hep-ph7 citations
8. 08*

   Improving the cold quark-matter pressure via soft interactions at N3LO

   Tyler Gorda🇩🇪

   The propagation of long-wavelength gluons through a dense QCD medium at high baryon chemical potential mu_B is qualitatively modified by the effects of screening, arising from scatterings off the high-momentum quarks in the medium. This same screening phenomenon also impacts gluons occurring in loop corrections to the pressure of cold quark matter, leading to contributions from the parametric scale Sqrt(alpha_s)*mu_B, starting at next-to-next-to-leading order (N2LO) in the strong coupling constant alpha_s. At next-to-next-to-next-to-leading order (N3LO), interactions between these long-wavelength gluonic modes contribute to the pressure. These interaction corrections have recently been computed in arXiv:2103.07427 and arXiv:2103.05658, and the inclusion of these interactions slightly improves the convergence of the equation of state of cold quark matter. In these proceedings, we present these results and provide details summarizing how this lengthy calculation was performed.

   hep-phnucl-thEPJ Web Conf.(2022)·0 citations
9. 09*

   Insignificance of the anomalous magnetic moment of the quarks in presence of chiral imbalance

   Nilanjan Chaudhuri🇮🇳 · Arghya Mukherjee🇮🇳 · Snigdha Ghosh🇮🇳 · Sourav Sarkar🇮🇳 · Pradip Roy🇮🇳

   We incorporate the anomalous magnetic moment (AMM) of quarks in the framework of PNJL model to study hot and dense magnetised matter with chiral imbalance. For this purpose, the eigen energy solution of the Dirac equation is obtained in presence of constant background magnetic field and chiral chemical potential (CCP) along with the minimal anomalous magnetic moment interaction of the fermion. Although there is a marginal enhancement in the IMC behaviour of the quark condensate due to the combined effects of AMM and CCP, we find that the overall behaviour of the Polyakov loop and the chiral charge density is dominated by the chiral chemical potential. It is further shown that the AMM effects in presence of CCP remains insignificant even after consideration of thermo-magnetically modified moments.

   hep-phnucl-thEPJA(2022)·13 citations
10. 10*

    The $\overline{\mathrm{MS}}$-scheme ${\alpha }_s^5$ QCD contributions to the Adler function and Bjorken polarized sum rule in the Crewther-type two-fold $\{\beta \}$-expanded representation

    I.O. Goriachuk🇷🇺 · A.L. Kataev🇷🇺 · V.S. Molokoedov🇷🇺

    We consider the two-fold expansion in powers of the conformal anomaly and of the strong coupling ${\alpha }_s$ for the non-singlet contributions to Adler $D$-function and Bjorken polarized sum rule calculated previously in the $\text{MSbar}$-scheme at the four-loop level. This representation provides relations between definite terms of different loop orders appearing within the $\{\beta \}$-expansion of these quantities. Supposing the validity of this two-fold representation at the five-loop order and using these relations, we obtain some $\mathcal{O}({\alpha }_s^5)$ corrections to the $D$-function, to the $R$-ratio of $e^{+}{e}^{-}$-annihilation into hadrons and to Bjorken polarized sum rule. These corrections are presented both analytically in the case of the generic simple gauge group and numerically for the $SU(3)$ color group. The arguments in the favor of validity of the two-fold representation are given at least at the four-loop level. Within the $\{\beta \}$-expansion procedure the analytical Riemann ${\zeta }_4$-contributions to the five-loop expressions for the Adler function and Bjorken polarized sum rule are also fixed for the case of the generic simple gauge group.

    hep-phhep-exhep-thJHEP(2022)·14 citations
11. 11*

    Monopoles From an Atmospheric Fixed Target Experiment

    Syuhei Iguro🇩🇪 · Ryan Plestid🇺🇸 · Volodymyr Takhistov🇯🇵

    Magnetic monopoles have a long history of theoretical predictions and experimental searches, carrying direct implications for fundamental concepts such as electric charge quantization. We analyze in detail for the first time magnetic monopole production from collisions of cosmic rays bombarding the atmosphere. This source of monopoles is independent of cosmology, has been active throughout Earth's history, and supplies an irreducible monopole flux for all terrestrial experiments. Using results for robust atmospheric fixed target experiment flux of monopoles, we systematically establish direct comparisons of previous ambient monopole searches with monopole searches at particle colliders and set leading limits on magnetic monopole production in the $\sim 5-100$ TeV mass-range.

    hep-phastro-ph.COastro-ph.HEhep-exPRL(2022)·19 citations
12. 12*

    Holographic QCD in the NICER era

    Niko Jokela🇫🇮 · Matti Järvinen🇰🇷 · Jere Remes🇪🇸

    We analyze families of hybrid equations of state of cold QCD matter, which combine input from gauge/gravity duality and from various ab initio methods for nuclear matter at low density, and predict that all neutron stars are fully hadronic without quark matter cores. We focus on constraints from recent measurements by the NICER telescope on the radius and mass of the millisecond pulsar PSR J0740+6620. These results are found to be consistent with our approach: they set only mild constraints on the hybrid equations of state, and favor the most natural models which are relatively stiff at low density. Adding an upper bound on the maximal mass of neutron stars, as suggested by the analysis of the GW170817 neutron star merger event, tightens the constraints considerably. We discuss updated predictions on observables such as the transition density and latent heat of the nuclear to quark matter transition as well as the masses, radii, and tidal deformabilities of neutron stars.

    hep-phastro-ph.HEhep-thnucl-thPRD(2022)·27 citations
13. 13*

    Causality Constraint on Circuit Complexity from $COSMOEFT$

    Sayantan Choudhury🇮🇳 · Arghya Mukherjee🇮🇳 · Nilesh Pandey🇮🇳 · Abhishek Roy🇮🇳

    In this article, we investigate the physical implications of the causality constraint via effective sound speed $c_s(\le 1)$ on Quantum Circuit Complexity(QCC) in the framework of Cosmological Effective Field Theory (COSMOEFT) using the two-mode squeezed quantum states. This COSMOEFT setup is constructed using the St$\ddot{\text{u}}$ckelberg trick with the help of the lowest dimensional operators, which are broken under time diffeomorphism. In this setup, we consider only the contribution from two derivative terms in the background quasi de Sitter metric. Next, we compute the relevant measures of circuit complexity and their cosmological evolution for different $c_s$ by following two different approaches, Nielsen's and Covariance matrix method. Using this setup, we also compute the Von-Neumann and Rényi entropy, which finally establishes an underlying connecting relationship between the entanglement entropy and circuit complexity. Essentially, we study the behaviour of the circuit complexity measures and entanglement entropy with respect to the scale factor and $c_s$ and find various interesting unexplored features within the window, $0.024\le c_s\le 1$, which is supported by both causality and cosmological observation. Finally, we also comment on the connection between the circuit complexity, entanglement entropy and equilibrium temperature for different $c_s$ lying within the mentioned window.

    ↳ hep-thgr-qchep-phquant-phFortsch.Phys.(2023)·16 citations
14. 14*

    Generalized unitarity method for unstable particles

    Gabriel Menezes🇧🇷

    In theories with unstable particles, unitarity is satisfied by the inclusion of only stable states in unitarity sums. Hence unitarity cuts are not to be taken through unstable particles. This raises a challenge to the generalized unitarity method, whose aim is to reconstruct amplitudes by analyzing sets of unitarity cuts. Nevertheless, under some general physical conditions, and perhaps some methodological modifications, we prove that the method is still reliable for one-loop amplitudes containing resonances. We discuss some simple examples which illustrate these features.

    ↳ hep-thhep-phUniverse(2023)·4 citations
15. 15*

    On the Extraction of Low-energy Constants of Single- and Double-$\beta$ Decays from Lattice QCD: A Sensitivity Analysis

    Zohreh Davoudi🇺🇸 · Saurabh V. Kadam🇺🇸

    Lattice quantum chromodynamics (LQCD) has the promise of constraining low-energy constants (LECs) of nuclear effective field theories (EFTs) from first-principles calculations that incorporate the dynamics of quarks and gluons. Given the Euclidean and finite-volume nature of LQCD outputs, complex mappings are developed in recent years to obtain the Minkowski and infinite-volume counterparts of LQCD observables. In particular, as LQCD is moving toward computing a set of important few-nucleon matrix elements at the physical values of the quark masses, it is important to investigate whether the anticipated precision of LQCD spectra and matrix elements will be sufficient to guarantee tighter constraints on the relevant LECs than those already obtained from phenomenology, considering the non-trivial mappings involved. With a focus on the leading-order LECs of the pionless EFT, $L_{1,A}$ and $g_{\nu }^{NN}$, which parametrize, respectively, the strength of the isovector axial two-body current in a single-$\beta$ decay (and other related processes such $pp$ fusion), and of the isotensor contact two-body operator in the neutrinoless double-$\beta$ decay within the light neutrino exchange scenario, the expected uncertainty on future extractions of $L_{1,A}$ and $g_{\nu }^{NN}$ are examined using synthetic data at the physical values of the quark masses. It is observed that achieving small uncertainties in $L_{1,A}$ will be challenging, and (sub)percent-level precision in the two-nucleon spectra and matrix elements is essential in reducing the uncertainty on this LEC compared to the existing constraints. On the other hand, the short-distance coupling of the neutrinoless double-$\beta$ decay, $g_{\nu }^{NN}$, is shown to be less sensitive to uncertainties on both LQCD energies and the matrix element, and can likely be constrained with percent-level precision in the upcoming LQCD calculations.

    ↳ hep-lathep-phnucl-thPRD(2022)·35 citations
16. 16*

    Searches for leptoquarks in scenarios of lepton flavor universality anomalies

    Arne Christoph Reimers (on behalf of the ATLAS and CMS Collaborations)🇨🇭

    Leptoquarks with masses at the TeV scale have been proposed as possible solutions to flavor anomalies reported in the b-flavor sector. Based on data taken in proton-proton collisions at $\sqrt{s}=13\mathrm{TeV}$ at the LHC, different leptoquark flavors can be probed in various final states. In this article, the results of direct searches for single and pair production of leptoquarks conducted by the ATLAS and CMS Collaborations are summarized.

    ↳ hep-exhep-phPoS(2022)·1 citation
17. 17*

    Neutrino mixing and oscillations in quantum field theory: a comprehensive introduction

    Luca Smaldone🇮🇹 · Giuseppe Vitiello🇮🇹

    We review some of the main results of the quantum field theoretical approach to neutrino mixing and oscillations. We show that the quantum field theoretical framework, where flavor vacuum is defined, permits to give a precise definition of flavor states as eigenstates of (non-conserved) lepton charges. We obtain the exact oscillation formula which in the relativistic limit reproduces the Pontecorvo oscillation formula and illustrate some of the contradictions arising in the quantum mechanics approximation. We show that the gauge theory structure underlies the neutrino mixing phenomenon and that there exist entanglement between mixed neutrinos. The flavor vacuum is found to be an entangled generalized coherent state of SU(2). We also discuss flavor energy uncertainty relations, which imposes a lower bound on the precision of neutrino energy measurements and we show that the flavor vacuum inescapably emerges in certain classes of models with dynamical symmetry breaking.

    ↳ hep-thhep-phquant-phUniverse(2021)·22 citations
18. 18*

    Implications of NICER for neutron star matter: the QHC21 equation of state

    Toru Kojo🇨🇳 · Gordon Baym🇺🇸 · Tetsuo Hatsuda🇯🇵

    The recent NICER measurement of the radius of the neutron star PSR J0740+6620, and the inferred small variation of radii from 1.4$M_{\odot }$ to 2.1$M_{\odot }$, reveal key features of the equation of state of neutron star matter. The pressure rises rapidly in the regime of baryon density $n\sim$ 2-4 times nuclear saturation density, $n_0$ -- the region where we expect hadronic matter to be undergoing transformation into quark matter -- and the pressure in the nuclear regime is greater than predicted by microscopic many-body variational calculations of nuclear matter. To incorporate these insights into the microscopic physics from the nuclear to the quark matter regimes, we construct an equation of state, QHC21, within the framework of quark-hadron crossover (QHC). We include nuclear matter results primarily based on the state-of-the-art chiral effective field theory, but also note results of using nuclear matter variational calculations based on empirical nuclear forces. We employ explicit nuclear degrees of freedom only up to $n\sim 1.5n_0$, in order to explore the possibility of further physical degrees of freedom than nucleonic here. The resulting QHC21, which has a peak in sound velocity in $\sim 2$-$4n_0$, is stiffer than the earlier QHC19 below 2$n_0$, predicting larger radii in substantial agreement with the NICER data.

    ↳ astro-ph.HEhep-phnucl-thApJ(2022)·96 citations
19. 19*

    New renormalons from analytic trans-series

    Marcos Marino🇨🇭 · Ramon Miravitllas🇨🇭 · Tomas Reis🇨🇭

    We study the free energy of integrable, asymptotically free field theories in two dimensions coupled to a conserved charge. We develop methods to obtain analytic expressions for its trans-series expansion, directly from the Bethe ansatz equations, and we use this result to determine the structure of its Borel singularities. We find a new class of infrared renormalons which does not fit the traditional expectations of renormalon physics proposed long ago by 't Hooft and Parisi. We check the existence of these new singularities with detailed calculations based on the resurgent analysis of the perturbative expansion. Our results show that the structure of renormalons in asymptotically free theories is more subtle than previously thought, and that large $N$ estimates of their location might be misleading.

    ↳ hep-thhep-lathep-phmath-ph+1JHEP(2022)·39 citations
20. 20*

    Scattering Amplitudes of Kaluza-Klein Strings and Extended Massive Double-Copy

    Yao Li🇨🇳 · Yan-Feng Hang🇨🇳 · Hong-Jian He🇨🇳 · Song He🇨🇳

    We study the scattering amplitudes of massive Kaluza-Klein (KK) states of open and closed bosonic strings under toroidal compactification. We analyze the structure of vertex operators for the KK strings and derive an extended massive KLT-like relation which connects the $N$-point KK closed-string amplitude to the products of two KK open-string amplitudes at tree level. Taking the low energy field-theory limit of vanishing Regge slope, we derive double-copy construction formula of the $N$-point massive KK graviton amplitude from the sum of proper products of the corresponding KK gauge boson amplitudes. Then, using the string-based massive double-copy formula, we derive the exact tree-level four-point KK gauge boson amplitudes and KK graviton amplitudes, which fully agree with those given by the KK field-theory calculations. With these, we give an explicit prescription on constructing the exact four-point KK graviton amplitudes from the sum of proper products of the corresponding color-ordered KK gauge boson amplitudes. We further analyze the string-based double-copy construction of five-point and six-point scattering amplitudes of massive KK gauge bosons and KK gravitons.

    ↳ hep-thgr-qchep-phJHEP(2022)·21 citations
21. 21*

    Broadband solenoidal haloscope for terahertz axion detection

    Jesse Liu🇬🇧 · Kristin Dona🇺🇸 · Gabe Hoshino🇺🇸 · Stefan Knirck🇺🇸 · Noah Kurinsky🇺🇸 · Matthew Malaker🇺🇸 · David W. Miller🇺🇸 · Andrew Sonnenschein🇺🇸 · Mohamed H. Awida🇺🇸 · Peter S. Barry🇺🇸 · Karl K. Berggren🇺🇸 · Daniel Bowring🇺🇸 and 9 other authors

    We introduce the Broadband Reflector Experiment for Axion Detection (BREAD) conceptual design and science program. This haloscope plans to search for bosonic dark matter across the [10${}^{-3}$, 1] eV ([0.24, 240] THz) mass range. BREAD proposes a cylindrical metal barrel to convert dark matter into photons, which a novel parabolic reflector design focuses onto a photosensor. This unique geometry enables enclosure in standard cryostats and high-field solenoids, overcoming limitations of current dish antennas. A pilot 0.7 m${}^2$ barrel experiment planned at Fermilab is projected to surpass existing dark photon coupling constraints by over a decade with one-day runtime. Axion sensitivity requires $<10^{-20}$ W/$\sqrt{\text{Hz}}$ sensor noise equivalent power with a 10 T solenoid and 10 m${}^2$ barrel. We project BREAD sensitivity for various sensor technologies and discuss future prospects.

    ↳ physics.ins-detastro-ph.IMhep-exhep-phPRL(2022)·191 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.