Nuclear Theory·nucl-th

Thursday·April 7, 2022

3 papers—1 primary·2 cross-listed

02
An updated review of the new hadron states
Hua-Xing Chen🇨🇳 · Wei Chen🇨🇳 · Xiang Liu🇨🇳 · Yan-Rui Liu🇨🇳 · Shi-Lin Zhu🇨🇳
The past decades witnessed the golden era of hadron physics. Many excited open heavy flavor mesons and baryons have been observed since 2017. We shall provide an updated review of the recent experimental and theoretical progresses in this active field. Besides the conventional heavy hadrons, we shall also review the recently observed open heavy flavor tetraquark states $X (2900)$ and $T_{cc}^{+} (3875)$ as well as the hidden heavy flavor multiquark states $X (6900)$ , $P_{cs} (4459)^{0}$ , $Z_{cs} (3985)^{-}$ , $Z_{cs} (4000)^{+}$ , and $Z_{cs} (4220)^{+}$ . We will also cover the recent progresses on the glueballs and light hybrid mesons, which are the direct manifestations of the non-Abelian $S U (3)$ gauge interaction of the Quantum Chromodynamics in the low-energy region.
↳ hep-phhep-exhep-latnucl-ex+1Rept.Prog.Phys.(2023)·785 citations
03
Lepton pair photoproduction in peripheral relativistic heavy-ion collisions
Ren-jie Wang🇨🇳 · Shuo Lin🇨🇳 · Shi Pu🇨🇳 · Yi-fei Zhang🇨🇳 · Qun Wang🇨🇳
We study the lepton pair photoproduction in peripheral heavy-ion collisions based on the formalism in our previous work [Phys. Rev. D 104, 056011 (2021)]. We present the numerical results for the distributions of the transverse momentum, azimuthal angle and invariant mass for $e^{+} e^{-}$ and $μ^{+} μ^{-}$ pairs as functions of the impact parameter and other kinematic variables in Au+Au collisions. Our calculation incorporates the information on the transverse momentum and polarization of photons which is essential to describe the experimental data. We observe a broadening effect in the transverse momentum for lepton pairs with and without smear effects. We also observe a significant enhancement in the distribution of $cos (2 φ)$ for $μ^{+} μ^{-}$ pairs. Our results provide a baseline for future studies of other higher order corrections beyond Born approximation and medium effects in the lepton pair production.
↳ hep-phnucl-thPRD(2022)·29 citations

Affiliations

first authorsco-authorsvia INSPIRE

An updated review of the new hadron states

Lepton pair photoproduction in peripheral relativistic heavy-ion collisions

Affiliations