Thu·Apr 7, 2022Thursday·April 7, 2022

1. 01*

   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 $SU(3)$ gauge interaction of the Quantum Chromodynamics in the low-energy region.

   ↳ hep-phhep-exhep-latnucl-ex+1Rept.Prog.Phys.(2023)·785 citations
2. 02*

   Light-by-light scattering cross-section measurements at LHC

   G. K. Krintiras🇺🇸 · I. Grabowska-Bold🇵🇱 · M. Kłusek-Gawenda🇵🇱 · É. Chapon🇫🇷 · R. Chudasama🇮🇳 · R. Granier de Cassagnac🇫🇷

   This note represents an attempt to gather the input related to light-by-light scattering ($\gamma \gamma$) cross-section measurements at LHC with the aim of checking the consistency with different standard model predictions. For the first time, we also consider the contribution from the ${\eta }_b(1S)$ meson production to the diphoton invariant mass distribution, by calculating its inclusive photoproduction cross-section. Using a simplified set of assumptions, we find a result of $115\pm 19\text{nb}$, consistent with standard model predictions within two standard deviations. Although an improved determination of the integrated fiducial $\text{PbPb}(\gamma \gamma )\to {\text{Pb}}^{(\ast )}\text{+}{\text{Pb}}^{(\ast )}\gamma \gamma$ cross-section by approximately 10\% could be potentially achieved relative to current measurements, further improvements are expected with the inclusion of existing or forthcoming LHC nuclear data.

   ↳ hep-phnucl-ex9 citations
3. 03*

   Light Response of Poly(ethylene 2,6-napthalate) to Neutrons

   Brennan Hackett🇺🇸 · Richard deBoer🇺🇸 · Yuri Efremenko🇺🇸 · Michael Febbraro🇺🇸 · Jason Nattress🇺🇸 · Dan Bardayan🇺🇸 · Chevelle Boomershine🇺🇸 · Kristyn Brandenburg🇲🇽 · Stefania Dede🇺🇸 · Joseph Derkin🇲🇽 · Ruoyu Fang🇺🇸 · Adam Fritsch🇲🇽 and 12 other authors

   There is increasing necessity for low background active materials as ton-scale, rare-event and cryogenic detectors are developed. Poly(ethylene-2,6-naphthalate) (PEN) has been considered for these applications because of its robust structural characteristics, and its scintillation light in the blue wavelength region. Radioluminescent properties of PEN have been measured to aid in the evaluation of this material. In this article we present a measurement of PEN's quenching factor using three different neutron sources; neutrons emitted from spontaneous fission in ${}^{252}$Cf, neutrons generated from a DD generator, and neutrons emitted from the ${}^{13}$C($\alpha$,n)${}^{16}$O and the ${}^7$Li(p,n)${}^7$Be nuclear reactions. The fission source used time-of-flight to determine the neutron energy, and the neutron energy from the nuclear reactions was defined using thin targets and reaction kinematics. The Birk's factor and scintillation efficiency were found to be $kB=0.12\pm 0.01$ mm MeV${}^{-1}$ and $S=1.31\pm 0.09$ MeV${}_{ee}$ MeV${}^{-1}$ from a simultaneous analysis of the data obtained from the three different sources. With these parameters, it is possible to evaluate PEN as a viable material for large-scale, low background physics experiments.

   ↳ physics.ins-dethep-exnucl-exNucl.Instrum.Meth.A(2024)·5 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.