Nuclear Theory·nucl-th

Monday·January 6, 2025

5 papers—1 primary·4 cross-listed

02
Forward dijet and vector meson production at the LHC
C. Royon🇺🇸 · J. Penttala🇺🇸
We first describe the predictions concerning jet production in the very forward region, especially in the FOCAL kinematic region of the ALICE collaboration at CERN as a test of saturation. We also compare vector meson production cross sections at the LHC in Pb Pb and p Pb collisions with the Balitsky Fadin Kuraev Lipatov and the Balitsky Kovchegov evolution equations and data favor the observation of saturation at the LHC.
↳ hep-phhep-exnucl-exnucl-thPoS(2025)·0 citations
03
Heavy quark suppression and anisotropic flow at intermediate momentum
Juhee Hong🇰🇷
In an intermediate-momentum regime where mass effects are significant, heavy quark suppression and anisotropic flow are computed to investigate the transition between the collisional and radiative energy loss. Based on the collision kernel for diffusion, elastic scattering and semi-collinear gluon-bremsstrahlung can be consistently incorporated into a Boltzmann equation that involves the heavy quark diffusion coefficient. Using the running coupling constant and the diffusion coefficient constrained by lattice QCD data, the collisional and radiative energy-loss contributions to the $R_{AA}$ and $v_{2}$ are studied in hydrodynamically expanding thermal media. The evolution of the observables, the bulk flow effect, and the dependence on mass and centrality are discussed in noncentral heavy-ion collisions.
↳ hep-phnucl-thPRC(2025)·7 citations
04
On the pole trajectory of the subthreshold negative parity nucleon with varying pion masses
Qu-Zhi Li🇨🇳 · Zhiguang Xiao🇨🇳 · Han-Qing Zheng🇨🇳
We study the pole trajectory of the recently established subthreshold negative parity nucleon pole, namely the $N^{*} (920)$ , with varying pion masses, in the scheme of linear $σ$ model with nucleons using the $N / D$ unitarization method. We find that as the pion mass increases, the pole moves toward the real axis. For larger pion masses, at tree level, the pole falls to a specific point on $u$ -channel cut and crosses to the adjacent Riemann sheet defined by the logarithmic $u$ channel cut. At one-loop level, the pole does not meet the $u$ -cut up to $m_{π} = 0.36$ GeV. We also re-examined the $σ$ pole trajectory and find it in good agreement with Roy equation analysis result.
↳ hep-phhep-latnucl-thCPC(2025)·4 citations
05
QCD Phase Diagram and Astrophysical Implications
Kenji Fukushima🇯🇵
I make a brief review about the QCD phases and the equation of state inferred from the neutron star data. Along the temperature axis at low baryon density, the QCD phase transition is a smooth crossover, and it is a natural extension of our imagination to postulate a similar crossover along the density axis at low temperature. Even without phase transitions, the inferred thermodynamic properties of neutron star matter turn out to be highly nontrivial already at twice of the nuclear saturation density. I also give some discussions about the substantiation of quark matter by means of the gravitational wave signals including the multi-messenger prospect.
↳ hep-phastro-ph.HEnucl-thJ.Subatomic Part.Cosmol.(2025)·21 citations

Affiliations

first authorsco-authorsvia INSPIRE

Forward dijet and vector meson production at the LHC

Heavy quark suppression and anisotropic flow at intermediate momentum

On the pole trajectory of the subthreshold negative parity nucleon with varying pion masses

QCD Phase Diagram and Astrophysical Implications

Affiliations