Nuclear Theory·nucl-th

Friday·June 16, 2023

23 papers—11 primary·12 cross-listed

12
[Submitted on 13 Jun 2023] (cross-list from hep-ph)
Interplay between non-interfering neutrino exchange mechanisms and nuclear matrix elements in $0 ν β β$ decay
Eligio Lisi🇮🇹 · Antonio Marrone🇮🇹 · Newton Nath🇮🇹
We revisit the phenomenology of neutrinoless double beta ( $0 ν β β$ ) decay mediated by non-interfering exchange of light and heavy Majorana neutrinos, in the context of current and prospective ton-scale experimental searches, as well as of recent calculations of nuclear matrix elements (NME) in different nuclear models. We derive joint upper bounds on the light and heavy contributions to $0 ν β β$ decay, for different sets of NME, through separate and combined data coming from the following experiments (and isotopes): KamLAND-Zen and EXO (Xe), GERDA, and MAJORANA (Ge) and CUORE (Te). We further consider three proposed projects that could provide, within current bounds, possible $0 ν β β$ decay signals at $> 3 σ$ level with an exposure of 10 ton years: nEXO (Xe), LEGEND (Ge) and CUPID (Mo). Separate and combined (Xe, Ge, Mo) signals are studied for different representative cases and NME sets, and the conditions leading to (non)degenerate light and heavy neutrino mechanisms are discussed. In particular, the role of heavy-to-light NME ratios in different isotopes is highlighted through appropriate graphical representations. By using different sets of "true" and "test" NME as a proxy for nuclear uncertainties, it is shown that the relative contributions of light and heavy neutrino exchange to $0 ν β β$ signals may be significantly biased in some cases. Implications for theoretical models connecting light and heavy Majorana neutrino masses are also briefly illustrated. These results provide further motivations to improve NME calculations, so as to better exploit the physics potential of future multi-isotope $0 ν β β$ searches at the ton scale.
Comments:
20 pages, 9 figures, discussion and references added, conclusion unchanged
Subjects:
High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
arXiv:
2306.07671 [pdf]
PRD(2023)·8 citations
13
[Submitted on 13 Jun 2023] (cross-list from hep-ph)
Improving Euler-Heisenberg-Schwinger effective action with dressed photons
Stefan Evans🇺🇸 · Johann Rafelski🇺🇸
We implement a longstanding proposal by Weisskopf to apply virtual polarization corrections to the in/out external fields in study of the Euler-Heisenberg-Schwinger effective action. Our approach requires distinguishing the electromagnetic and polarization fields based on mathematical tools developed by Białynicki-Birula, originally for the Born-Infeld action. Our solution is expressed as a differential equation where the one-loop effective action serves as input. As a first result of our approach, we recover the higher-order one-cut reducible loop diagrams discovered by Gies and Karbstein.
Comments:
This article belongs to the special issue of Acta Physica Polonica A printed in honor of Professor Iwo Bialynicki-Birula on the occasion of his 90th birthday (Ed. Tomasz Sowinski, DOI:10.12693/APhysPolA.143.S0)
Subjects:
High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Theory (hep-th); Nuclear Theory (nucl-th); Quantum Physics (quant-ph)
arXiv:
2306.07887 [pdf]
Acta Phys.Polon.A(2023)·4 citations
14
[Submitted on 13 Jun 2023] (cross-list from hep-ph)
NNLL Resummation of Sudakov Shoulder Logarithms in the Heavy Jet Mass Distribution
Arindam Bhattacharya🇺🇸 · Johannes K. L. Michel🇺🇸 · Matthew D. Schwartz🇺🇸 · Iain W. Stewart🇺🇸 · Xiaoyuan Zhang🇺🇸
The heavy jet mass event shape has large perturbative logarithms near the leading order kinematic threshold at $ρ = \frac{1}{3}$ . Catani and Webber named these logarithms Sudakov shoulders and resummed them at double-logarithmic level. A resummation to next-to-leading logarithmic level was achieved recently. Here, we extend the resummation using an effective field theory framework to next-to-next-to-leading logarithmic order and show how to combine it with the resummation of dijet logarithms. We also solve the open problem of an unphysical singularity in the resummed momentum space distribution, in a way similar to how it is resolved in the Drell-Yan $q_{T}$ spectrum: through a careful analysis of the kinematics and scale-setting in position space. The heavy jet mass Sudakov shoulder is the first observable that does not involve transverse momentum for which position space resummation is critical. These advances may lead to a more precise extraction of the strong coupling constant from $e^{+} e^{-}$ data.
Comments:
33 pages + appendices, 10 figures
Subjects:
High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
2306.08033 [pdf]
JHEP(2023)·18 citations
15
[Submitted on 13 Jun 2023] (cross-list from hep-th)
Lectures on Field Theory and the Standard Model: A Symmetry-Oriented Approach
Luis Alvarez-Gaume🇺🇸 · Miguel A. Vazquez-Mozo🇪🇸
The standard model of particle physics represents the cornerstone of our understanding of the microscopic world. In these lectures we review its contents and structure, with a particular emphasis on the central role played by symmetries and their realization. This is not intended to be an exhaustive review but a discussion of selected topics that we find interesting, with the specific aim of clarifying some subtle points and potential misunderstandings. A number of more technical topics are discussed in separated boxes interspersed throughout the text.
Comments:
Comments: 136 pages, many figures. LaTeX+feynmf. To appear in Proceedings of the 2022 European School for High Energy Physics (Jerusalem, Israel, November 30th to December 14th, 2022), eds. Markus Elsing and Alex Huss
Subjects:
High Energy Physics — Theory (hep-th); General Relativity and Quantum Cosmology (gr-qc); High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
2306.08097 [pdf]
CERN Yellow Rep.School Proc.(2025)·1 citation
16
[Submitted on 14 Jun 2023] (cross-list from astro-ph.HE)
Radial and Non-Radial Oscillations of Inverted Hybrid Stars
Chen Zhang🇨🇳 · Yudong Luo🇨🇳 · Hong-bo Li🇨🇳 · Lijing Shao🇨🇳 · Renxin Xu🇨🇳
We study the radial and non-radial oscillations of Cross stars (CrSs), i.e., stars with a quark matter crust and a hadronic matter core in an inverted order compared to conventional hybrid stars. We draw comparisons of their oscillation modes with those of neutron stars, quark stars, and conventional hybrid stars. We find that the stellar stability analysis from the fundamental mode of radial oscillations, and the $g$ , $f$ modes of non-radial oscillations are quite similar to those of conventional hybrid stars. However, due to the inverted stellar structure, the first non-radial $p$ mode of CrSs behaves in an inverted way and sits in a higher frequency domain compared to that of conventional hybrid stars. These results provide a direct way to discriminate CrSs from other types of compact stars via gravitational-wave probes. Specifically, compact stars emitting $g$ -mode gravitational waves within the $0.5$ - $1$ kHz range should be CrSs or conventional hybrid stars rather than neutron stars or pure quark stars, and a further GW detection of the first $p$ mode above 8 kHz or an identification of a decreasing trend of frequencies versus star masses associated with it will help identify the compact object to be a CrS rather than a conventional hybrid star.
Comments:
13 pages, 7 figures. Published version
Subjects:
High Energy Astrophysical Phenomena (astro-ph.HE); Solar and Stellar Astrophysics (astro-ph.SR); General Relativity and Quantum Cosmology (gr-qc); High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
2306.08234 [pdf]
PRD(2024)·20 citations
17
[Submitted on 14 Jun 2023] (cross-list from hep-ph)
$Q Q ˉ q q q$ Quark System, Compact Pentaquark, and Gauge/String Duality (Part II)
Oleg Andreev🇩🇪
This is the second of two companion papers in which we continue to develop the construction of the doubly heavy pentaquark systems using the gauge/string duality. In this paper, we propose a stringy description of the $Q Q ˉ q q q$ system in the case of two light flavors. Our goal is to explore the lower-lying Born-Oppenheimer potentials as a function of the separation distance between the heavy quark-antiquark pair. The analysis shows that the ground state Born-Oppenheimer potential is described in terms of both hadro-quarkonia and hadronic molecules. Meanwhile a standard pentaquark configuration, which describes a genuine five-quark interaction, makes the dominant contribution to a higher lying potential. This configuration has an antiquark-diquark-diquark structure $Q ˉ [q q] [Qq]$ for separations larger than $0.1 fm$ . The latter enables us to establish a relation among the masses of hadrons in the heavy quark limit. To describe the structure of the potentials more clear, we define some critical separations that are related to the processes of string reconnection, breaking and junction annihilation. Additionally, we consider the generalized baryon vertices, where more than three strings can meet, and explore their implications for the pentaquark systems.
Comments:
29 pages, many figures. arXiv admin note: text overlap with arXiv:2211.12305; v2: minor corrections; v3: clarifications and references added; v4: misprint corrected
Subjects:
High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Lattice (hep-lat); High Energy Physics — Theory (hep-th); Nuclear Theory (nucl-th)
arXiv:
2306.08581 [pdf]
PRD(2023)·7 citations
18
[Submitted on 14 Jun 2023] (cross-list from hep-ph)
Transverse momentum spectra of $f_{0} (980)$ from coalescence model
An Gu🇺🇸 · Fuqiang Wang🇺🇸
We use a coalescence model to generate $f_{0}$ (980) particles for four configurations: $s s ˉ$ meson, $u u ˉ s s ˉ$ tetraquark, $K^{+} K^{-}$ molecule and $u u ˉ$ p-wave state. The phase-space information of the coalescing constituents is taken from a multi-phase transport (AMPT) simulation of proton-proton and proton-lead collisions at the LHC. It is shown that the transverse momentum spectra and production yields of $f_{0} (980)$ differ significantly among the configurations. It is suggested that the $p_{T}$ spectra of the $f_{0} (980)$ compared to those of other hadrons (such as pion) and the ratio of the $f_{0} (980)$ $p_{T}$ spectra in pPb over pp can be exploited to tell the configuration of the $f_{0} (980)$ .
Subjects:
High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
2306.08584 [pdf]
PLB(2024)·3 citations
19
[Submitted on 14 Jun 2023] (cross-list from hep-ph)
Higher Order Corrections to the Effective Field Theory of Low-energy Axions
Bryan Cordero-Patino🇪🇨 · Álvaro Duenas-Vidal🇪🇨 · Jorge Segovia🇪🇸
Dark matter (DM) can be composed of a collection of axions, or axion-like particles (ALPs), whose existence is due to the spontaneous breaking of the Peccei-Quinn $U (1)$ symmetry which is the most compelling solution of the strong $C P$ -problem of Quantum Chromodynamics (QCD). Axions must be spin- $0$ particles with very small masses and extremely weak interactions with themselves as well as with the particles that constitute the Standard Model. In general, the physics of axions is detailed by a quantum field theory of a real scalar field, $ϕ$ . Nevertheless, it is more convenient to implement a non-relativistic effective field theory with a complex scalar field, $ψ$ , to characterize the mentioned axions in the low-energy regime. A possible application of this equivalent description is to study the collapse of cold dark matter into more complex structures. There have been a few derivations of effective Lagrangians for the complex field $ψ$ ; resulting to be all equivalent after a nonlocal-space transformation between $ϕ$ and $ψ$ was found, and some other corrections were introduced. Our contribution herein is to further provide higher order corrections, in particular, we compute the effective field theory Lagrangian up to order $(ψ^{*} ψ)^{5}$ , incorporating also the fast-oscillating field fluctuations into the dominant slowly-varying non-relativistic field.
Comments:
48 pages
Subjects:
High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); High Energy Physics — Theory (hep-th); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
arXiv:
2306.08721 [pdf]
Symmetry(2023)·1 citation
20
[Submitted on 15 Jun 2023] (cross-list from quant-ph)
Shadow-based quantum subspace algorithm for the nuclear shell model
Ruyu Yang🇨🇳 · Tianren Wang🇨🇳 · Bing-Nan Lu🇨🇳 · Ying Li🇨🇳 · Xiaosi Xu🇨🇳
In recent years, researchers have been exploring the applications of noisy intermediate-scale quantum (NISQ) computation in various fields. One important area in which quantum computation can outperform classical computers is the ground state problem of a many-body system, e.g., the nucleus. However, using a quantum computer in the NISQ era to solve a meaningful-scale system remains a challenge. To calculate the ground energy of nuclear systems, we propose a new algorithm that combines classical shadow and subspace diagonalization techniques. Our subspace is composed of matrices, with the basis of the subspace being the classical shadow of the quantum state. We test our algorithm on nuclei described by Cohen-Kurath shell model and USD shell model. We find that the accuracy of the results improves as the number of shots increases, following the Heisenberg scaling.
Subjects:
Quantum Physics (quant-ph); Nuclear Theory (nucl-th)
arXiv:
2306.08885 [pdf]
PRA(2025)·9 citations
21
[Submitted on 15 Jun 2023] (cross-list from hep-ph)
Universality of energy-momentum response in kinetic theories
Xiaojian Du🇪🇸 · Stephan Ochsenfeld🇩🇪 · Sören Schlichting🇩🇪
We study the response of the energy-momentum tensor in several kinetic theories, from the simple relaxation time approximation (RTA) to Quantum Chromodynamics (QCD). Irrespective of the differences in microscopic properties, we find a remarkable degree of universality in the response functions from conformal theories. We find that the response to scalar perturbations in kinetic theory can be effectively described by a pair of one hydrodynamic sound mode and one non-hydrodynamic mode. We find that even beyond the range of validity of hydrodynamics, the energy-momentum response in position space can be effectively described by one single mode with non-trivial dispersion relation and residue.
Comments:
10 pages, 7 figures
Subjects:
High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
2306.09094 [pdf]
PLB(2023)·13 citations
22
[Submitted on 15 Jun 2023] (cross-list from hep-ph)
Theory of heavy-quarks contribution to the quark-gluon plasma viscosity
Alessio Zaccone🇮🇹
The shear viscosity of quark gluon plasma is customarily estimated in the literature using kinetic theory, which, however, is well known to break down for dense interacting systems. Here we propose an alternative theoretical approach based on recent advances in the physics of dense interacting liquid-like systems, which is valid for strongly-interacting and arbitrarily dense relativistic systems. With this approach, the viscosity of strongly interacting dense heavy-quarks plasma is evaluated analytically, at the level of special relativity. For QGP well above the confinement temperature, the theory predicts that the viscosity increases with the cube of temperature, in agreement with evidence.
Comments:
arXiv admin note: text overlap with arXiv:2306.05771
Subjects:
High Energy Physics — Phenomenology (hep-ph); Statistical Mechanics (cond-mat.stat-mech); High Energy Physics — Lattice (hep-lat); Nuclear Theory (nucl-th)
arXiv:
2306.09225 [pdf]
NPB(2024)·5 citations
23
[Submitted on 15 Jun 2023] (cross-list from hep-ph)
QCD resummation of dijet azimuthal decorrelations in pp and pA collisions
Mei-Sen Gao🇨🇳 · Zhong-Bo Kang🇺🇸 · Ding Yu Shao🇨🇳 · John Terry🇺🇸 · Cheng Zhang🇨🇳
We study the azimuthal angular decorrelations of dijet production in both proton-proton (pp) and proton-nucleus (pA) collisions. By utilizing soft-collinear effective theory, we establish the factorization and resummation formalism at the next-to-leading logarithmic accuracy for the azimuthal angular decorrelations in the back-to-back limit in pp collisions. We propose an approach where the nuclear modifications to dijet production in pA collisions are accounted for in the nuclear modified transverse momentum dependent parton distribution functions (nTMDPDFs), which contain both collinear and transverse dynamics. This approach naturally generalizes the well-established formalism related to the nuclear modified collinear parton distribution functions (nPDFs). We demonstrate strong consistency between our methodology and the CMS measurements in both pp and pA collisions, and make predictions for dijet production in the forward rapidity region in pA collisions at LHC kinematics and for mid-rapidity kinematics at sPHENIX. Throughout this paper, we focus on the application of this formalism to a simultaneous fit to both collinear and transverse momentum dependent contributions to the transverse momentum dependent distributions.
Comments:
26 pages, 6 figures
Subjects:
High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
arXiv:
2306.09317 [pdf]
JHEP(2023)·18 citations

Affiliations

first authorsco-authorsvia INSPIRE