Nuclear Theory·nucl-th

Tuesday·August 2, 2022

25 papers—15 primary·10 cross-listed

16
[Submitted on 29 Jul 2022] (cross-list from hep-ph)
GTMDs and the factorization of exclusive double Drell-Yan
Miguel G. Echevarria🇪🇸 · Patricia A. Gutierrez Garcia🇪🇸 · Ignazio Scimemi🇪🇸
Different exclusive processes have been proposed to access the generalized transverse momentum dependent distributions (GTMDs) with no proof of factorization, which allows to rigorously define the GTMDs. Using Soft Collinear Effective Theory we derive for the first time the factorization of the differential cross section for the exclusive double Drell-Yan process for the exclusive double Drell-Yan process pion N to N' gamma* gamma* to N' (l^+l^-)(l^+l^-), for small transverse momenta of the photons in terms of a perturbatively calculable hard factor, GTMDs and light-cone wave functions (LCWFs). We find that the hard factor of the process can be obtained from single inclusive Drell-Yan production so that one can resum logarithms at high orders in QCD. We also discuss the evolution of the GTMDs and the LCWFs.
Comments:
9 pages, 3 figure. Version accepted for publication
Subjects:
High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); High Energy Physics — Lattice (hep-lat); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
arXiv:
2208.00021 [pdf]
PLB(2023)·15 citations
17
[Submitted on 29 Jul 2022] (cross-list from astro-ph.SR)
Ignition of carbon burning from nuclear fission in compact stars
C. J. Horowitz
Type-Ia supernovae (SN Ia) are powerful stellar explosions that provide important distance indicators in cosmology. Recently, we proposed a new SN Ia mechanism that involves a nuclear fission chain reaction in an isolated white dwarf (WD) [PRL 126, 1311010]. The first solids that form as a WD starts to freeze are actinide rich and potentially support a fission chain reaction. In this letter we explore thermonuclear ignition from fission heating. We perform thermal diffusion simulations and find at high densities, above about 7x10^8 g/cm^3, that the fission heating can ignite carbon burning. This could produce a SN Ia or another kind of astrophysical transient.
Comments:
6 pages, 3 figures, Accepted ApJ Letters
Subjects:
Solar and Stellar Astrophysics (astro-ph.SR); High Energy Astrophysical Phenomena (astro-ph.HE); Nuclear Theory (nucl-th)
arXiv:
2208.00053 [pdf]
ApJL(2022)·2 citations
18
[Submitted on 31 Jul 2022] (cross-list from hep-ph)
Bayesian inference of the fluctuating proton shape in DIS and hadronic collisions
Heikki Mäntysaari🇫🇮 · Björn Schenke🇺🇸 · Chun Shen🇺🇸 · Wenbin Zhao🇺🇸
We determine the likelihood distribution for the model parameters describing the event-by-event fluctuating proton geometry at small $x$ by performing a Bayesian analysis within the Color Glass Condensate framework. The exclusive $J / ψ$ production data from HERA is found to constrain the model parameters well, and we demonstrate that complementary constraints can be obtained from simulations of Pb+Pb collisions at the LHC.
Comments:
6 pages, contribution to the proceedings of the Quark Matter 2022 conference
Subjects:
High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
2208.00396 [pdf]
Acta Phys.Polon.Supp.(2023)·3 citations
19
[Submitted on 31 Jul 2022] (cross-list from hep-th)
Non-equilibrium attractor in high-temperature QCD plasmas
Dekrayat Almaalol🇺🇸 · Kirill Boguslavski🇦🇹 · Aleksi Kurkela🇳🇴 · Michael Strickland🇺🇸
We establish the existence of a far-from-equilibrium attractor in weakly-coupled gauge theory undergoing 0+1d Bjorken expansion which goes beyond the energy-momentum tensor to the detailed form of the one-particle distribution function. We then demonstrate that the dynamics can be re-scaled at intermediate times and represented by universal exponents. Finally, we assess different procedures for reconstructing the full one-particle distribution function from the energy-momentum tensor along the attractor and discuss implications for the freeze-out procedure used in the phenomenological analysis of ultra-relativistic nuclear collisions
Comments:
arXiv admin note: substantial text overlap with arXiv:2004.05195
Subjects:
High Energy Physics — Theory (hep-th); High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
2208.00513 [pdf]
2 citations
20
[Submitted on 1 Aug 2022] (cross-list from nucl-ex)
Pion, kaon, and (anti-)proton production in U+U Collisions at $s_{N N}$ = 193 GeV measured with the STAR detector
STAR Collaboration: M. S. Abdallah🇪🇬 · B. E. Aboona🇺🇸 · J. Adam🇺🇸 · J. R. Adams🇺🇸 · J. K. Adkins🇺🇸 · G. Agakishiev🇷🇺 · I. Aggarwal🇮🇳 · M. M. Aggarwal🇮🇳 · Z. Ahammed🇮🇳 · A. Aitbaev🇷🇺 · I. Alekseev🇷🇺 · D. M. Anderson🇺🇸 and 342 other authors
We present the first measurements of transverse momentum spectra of $π^{\pm}$ , $K^{\pm}$ , $p (p ˉ)$ at midrapidity ( $∣ y ∣ < 0.1$ ) in U+U collisions at $s_{N N}$ = 193 GeV with the STAR detector at the Relativistic Heavy Ion Collider (RHIC). The centrality dependence of particle yields, average transverse momenta, particle ratios and kinetic freeze-out parameters are discussed. The results are compared with the published results from Au+Au collisions at $s_{N N} =$ 200 GeV in STAR. The results are also compared to those from A Multi Phase Transport (AMPT) model.
Comments:
17 pages, 14 figures and 7 tables; Replaced with the updated version published in Physical Review C
Subjects:
Nuclear Experiment (nucl-ex); High Energy Physics — Experiment (hep-ex); High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
2208.00653 [pdf]
PRC(2023)·17 citations
21
[Submitted on 1 Aug 2022] (cross-list from hep-ph)
Electroweak production of $χ_{Q 1}$ states in $e^{+} e^{-}$ collisions: A brief review
N.N. Achasov🇷🇺 · A.V. Kiselev🇷🇺 · G.N. Shestakov🇷🇺
A brief review of the available experimental and theoretical results on the production of the $χ_{Q 1}$ states in $e^{+} e^{-}$ annihilation and photon-photon $γ γ^{*}$ interactions is presented. Future data on the production of the $χ_{c 1} (1 P)$ , $χ_{c 1} (3872)$ , $χ_{c 1} (4140)$ , $χ_{c 1} (4274)$ , $χ_{c 1} (4685)$ , $χ_{b 1} (1 P)$ , $χ_{b 1} (2 P)$ , and $χ_{b 1} (3 P)$ resonances in $e^{+} e^{-}$ annihilation and $γ γ^{*}$ interactions will help the development and unification of theoretical predictions related to the electroweak decays of heavy quarkonia, the reduction of their spread and model uncertainties.
Comments:
6 pages; v2: published version, corrections and clarifications made, new references and a paragraph on polarized electron beam added
Subjects:
High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
arXiv:
2208.00793 [pdf]
PRD(2022)·10 citations
22
[Submitted on 1 Aug 2022] (cross-list from hep-ph)
The role of initial state radiation in quenched jets
Korinna Zapp🇸🇪
Jet quenching in heavy ion collisions and in particular the sub-structure of quenched jets are promising tools for investigating the microscopic processes underlying jet quenching and the background medium's response to energy and momentum depositions. A quantitative understanding of the data can, however, be complicated by the presence of initial state radiation in reconstructed jets. Using an extended version of JEWEL the effect of initial state radiation on different jet observables is studied in proton-proton and heavy ion collisions. It is shown that, depending on the observable and the jet radius, the initial state contributions can be sizable. Some general insights into when sizable effects can be expected also emerges.
Comments:
8 pages, 16 figures, v2: slightly extended discussion and two new figures
Subjects:
High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
2208.00813 [pdf]
PLB(2022)·5 citations
23
[Submitted on 1 Aug 2022] (cross-list from hep-ph)
Comments and extensions of a suggestion for a relativistic charge density definition
Carl E. Carlson (William & Mary)🇺🇸
A recent suggested definition of a relativistically correct three dimensional charge density of an extended hadron is shown to be physically and intuitively connected to an earlier relativistically correct two dimensional charge density studied in the context of light-front physics. Looking at spin-1/2 hadrons, such a connection is shown to exist for both the polarized and unpolarized cases.
Comments:
4 pages, no figures, v2 includes an appendix not present in v1
Subjects:
High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
2208.00826 [pdf]
11 citations
24
[Submitted on 1 Aug 2022] (cross-list from hep-ph)
Multi-hadron molecules: status and prospect
Tian-Wei Wu🇨🇳 · Ya-Wen Pan🇨🇳 · Ming-Zhu Liu🇨🇳 · Li-Sheng Geng🇨🇳
Starting from 2003, the discovery of a large amount of the so-called exotic hadronic states, i.e., the $X Y Z$ states, the pentaquark states as well as the tetraquark states, have not only revived studies of hadron spectroscopy, but also hinted at the existence of new multi-hadron states made of hadrons other than nucleons and hyperons. We briefly comment on some of the latest studies on multi-hadron molecules in the light and heavy flavor sectors and highlight what should be done in the future.
Comments:
5 pages, 2 figures, 1 table; to appear in Science Bulletin as a Perspective article
Subjects:
High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); High Energy Physics — Lattice (hep-lat); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
arXiv:
2208.00882 [pdf]
Sci.Bull.(2022)·30 citations
25
[Submitted on 1 Aug 2022] (cross-list from astro-ph.HE)
Constraining Nuclear Symmetry Energy with Multi-messenger Resonant Shattering Flares
Duncan Neill · Rebecca Preston · William G. Newton · David Tsang
Much effort is devoted to measuring the nuclear symmetry energy through neutron star (NS) and nuclear observables. Since matter in the NS core may be non-hadronic, observables like radii and tidal deformability may not provide reliable constraints on properties of nucleonic matter. We demonstrate that coincident timing of a resonant shattering flare (RSF) and gravitational wave signal during binary NS inspiral probes the crust-core transition region and provides constraints on the symmetry energy comparable to terrestrial nuclear experiments. We show that nuclear masses, RSFs and measurements of NS radii and tidal deformabilities constrain different density ranges of the EOS, providing complementary probes.
Comments:
7 pages, 3 figures submitted to PRL
Subjects:
High Energy Astrophysical Phenomena (astro-ph.HE); Nuclear Theory (nucl-th)
arXiv:
2208.00994 [pdf]
PRL(2023)·32 citations

Affiliations

first authorsco-authorsvia INSPIRE