Thu·Nov 24, 2022Thursday·November 24, 2022

1. 01*

   Anisotropic flow of (multi-)strange hadrons in Au+Au collisions in BES-II energies at STAR

   Prabhupada Dixit (for the STAR collaboration)🇮🇳

   In these proceedings, we report the elliptic ($v_2$) and triangular ($v_3$) flow measurements of strange and multi-strange hadrons such as $K_S^0$, ~$\Lambda$($\bar{\Lambda }$), ~$\varphi$, ~${\Xi }^{-}$(${\bar{\Xi }}^{+}$), and ${\Omega }^{-}$(${\bar{\Omega }}^{+}$) at mid-rapidity ($|y|<1.0$) in Au+Au collisions at $\sqrt{s_{NN}}$ = 19.6 GeV using high statistics Beam Energy Scan Phase-II (BES-II) data. The transverse momentum ($p_T$) dependence, centrality dependence, and the number of constituent quarks (NCQ) scaling of $v_2$ and $v_3$ are studied for all these particles. A better NCQ scaling is observed in the case of antiparticles compared to particles, which can be attributed to the contribution from the transported quarks in particles. The hydrodynamically motivated ratio ($v_3/v_2^{3/2}$) is presented as a function of $p_T$.

   nucl-exhep-exPoS·3 citations
2. 02*

   Spin polarization and alignment in heavy-ion collisions

   Subhash Singha🇨🇳

   We report the measurements of global spin polarization of hyperons ($P_{\Lambda }$) from FAIR, RHIC and LHC energies. The $P_{\Lambda }$ continue to follow an increasing trend at $\sqrt{s_{\mathrm{N}N}}$ < 7.7 GeV indicating that enormous vorticity prevail even in hadronic dominant region. New measurements of local spin polarization ($P_{z,2}$) from isobar collisions follow the same pattern observed in previous RHIC and LHC energies. An observable motivated by predicted baryonic Spin Hall Effect, the net local polarization ($P_{z,2}^{\mathrm{net}}$), shows negative value in Au+Au collisions at $\sqrt{s_{\mathrm{N}N}}$ = 19.6 and 27 GeV. The first $P_z$ measurement with respect to third order harmonic in 200 GeV RHIC isobar collisions show a non-zero sine modulation, indicating the presence of complex vortical structure in the medium. Surprising new patterns of spin alignment (${\rho }_{00}$) for various vector mesons ($K^{\ast 0}$, $K^{\ast \pm }$, $\varphi$ and $J/\psi$) emerged at both RHIC and LHC energies. The large deviation in ${\rho }_{00}$ of several species poses challenge to the theory.

   nucl-exhep-exhep-phnucl-thEPJ Web Conf.(2023)·2 citations
3. 03*

   Schwinger mechanism for gluons from lattice QCD

   A. C. Aguilar🇧🇷 · F. De Soto🇪🇸 · M. N. Ferreira🇪🇸 · J. Papavassiliou🇪🇸 · F. Pinto-Gómez🇪🇸 · C. D. Roberts🇨🇳 · J. Rodríguez-Quintero🇪🇸

   Continuum and lattice analyses have revealed the existence of a mass-scale in the gluon two-point Schwinger function. It has long been conjectured that this expresses the action of a Schwinger mechanism for gauge boson mass generation in quantum chromodynamics (QCD). For such to be true, it is necessary and sufficient that a dynamically-generated, massless, colour-carrying, scalar gluon+gluon correlation emerge as a feature of the dressed three-gluon vertex. Working with results on elementary Schwinger functions obtained via the numerical simulation of lattice-regularised QCD, we establish with an extremely high level of confidence that just such a feature appears; hence, confirm the conjectured origin of the gluon mass scale.

   ↳ hep-phhep-exhep-latnucl-ex+1PLB(2023)·37 citations
4. 04*

   Probing the size and binding energy of the hypertriton in heavy ion collisions

   C.A. Bertulani🇺🇸

   The hypertriton is predicted to have a small binding energy (a weighted average of about 150 keV), consistent with a large matter radius (~ 10 fm), larger than the historical 11Li halo discovered more than 35 years ago. But the reported experimental values of the binding energy of the hypertriton range from 70 to 400 keV. In this work I discuss the electromagnetic response and interaction radius of the hypertriton and how high energy heavy ion collisions (~ 1 - 2 GeV/nucleon) can help achieving a higher accuracy for the determination of its size and binding energy.

   ↳ nucl-thastro-ph.SRnucl-exPLB(2023)·12 citations
5. 05*

   Light-quark baryons

   Volker Burkert🇺🇸 · Eberhard Klempt🇩🇪 · Ulrike Thoma🇩🇪

   This is a contribution to the review "50 Years of Quantum Chromdynamics" edited by F. Gross and E. Klempt [arXiv:2212.11107], to be published in EPJC. The contribution reviews the new baryon resonances derived from photoproduction experiments. Implications of the new results for the interpretation of baryons are discussed.

   ↳ hep-phnucl-ex5 citations
6. 06*

   Multi-Petawatt Physics Prioritization (MP3) Workshop Report

   A. Di Piazza🇩🇪 · L. Willingale🇺🇸 · J. D. Zuegel🇺🇸

   This Multi-Petawatt Physics Prioritization (MP3) Workshop Report captures the outcomes from a community-initiated workshop held April 20-22, 2022 at Sorbonne University in Paris, France. The MP3 workshop aimed at developing science questions to guide research and future experiments in four areas identified by corresponding MP3 working groups: high-field physics and quantum electrodynamics (HFP/QED), laboratory astrophysics and planetary physics (LAPP), laser-driven nuclear physics (LDNP), and particle acceleration and advanced light sources (PAALS).

   ↳ hep-phastro-ph.HEnucl-exphysics.acc-ph+124 citations
7. 07*

   Transverse-momentum-dependent factorization at next-to-leading power

   Leonard Gamberg🇺🇸 · Zhong-Bo Kang🇺🇸 · Ding Yu Shao🇨🇳 · John Terry🇺🇸 · Fanyi Zhao🇺🇸

   We study transverse momentum dependent factorization and resummation at sub-leading power in Drell-Yan and semi-inclusive deep inelastic scattering. In these processes the sub-leading power contributions to the cross section enter as a kinematic power correction to the leptonic tensor, and the kinematic, intrinsic, and dynamic sub-leading contributions to the hadronic tensor. By consistently treating the power counting of the interactions, we demonstrate renormalization group consistency. We calculate the anomalous dimensions of the kinematic and intrinsic sub-leading correlation functions at one loop and find that the evolution equations give rise to anomalous dimension matrices which mix leading and sub-leading power distribution functions. Additionally we calculate the hard and soft functions associated with each of these contributions. We find that these hard and soft contributions differ from those at the leading power. Finally, we calculate the rapidity anomalous dimension for the dynamic sub-leading distributions and find that it is the same as the leading power anomalous dimension. We then comment on the implications for the soft function associated with this contribution. Using this information, we establish the factorization formalism at sub-leading power for these processes at the one-loop level.

   ↳ hep-phnucl-exnucl-th30 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.