Wed·Apr 12, 2023Wednesday·April 12, 2023

1. 01*

   Is the LHCb $P_c(4312{)}^{+}$ plausible in the GlueX $\gamma p\to J/\psi p$ total cross sections ?

   Igor Strakovsky (GWU)🇺🇸 · William J. Briscoe (GWU)🇺🇸 · Eugene Chudakov (JLab)🇺🇸 · Ilya Larin (UMASS Amherst)🇺🇸 · Lubomir Pentchev (JLab)🇺🇸 · Axel Schmidt (GWU)🇺🇸 · Ronald L. Workman (GWU)🇺🇸

   New high-statistics total cross section data for $\gamma p\to J/\psi p$ from the GLUonic EXcitation (GlueX) experiment are fitted in a search for the exotic $P_c(4312{)}^{+}$ state observed by the Large Hadron Collider beauty (LHCb) collaboration. The integrated luminosity of this GlueX experiment was about $320\mathrm{p}{\mathrm{b}}^{-1}$. The fits show that destructive interference involving an $S$-wave resonance and associated non-resonance background produces a sharp dip structure about $75\mathrm{MeV}$ below the LHCb mass, in the same location as a similar structure is seen in the data. Limitations of the employed model and the need for improved statistics are discussed.

   ↳ hep-phhep-exnucl-exnucl-thPRC(2023)·23 citations
2. 02*

   ZnO-based scintillating bolometers: New prospects to study double beta decay of ${}^{64}$Zn

   A. Armatol🇫🇷 · B. Broerman🇨🇦 · L. Dumoulin🇫🇷 · A. Giuliani🇫🇷 · H. Khalife🇫🇷 · M. Laubenstein🇮🇹 · P. Loaiza🇫🇷 · P. de Marcillac🇫🇷 · S. Marnieros🇫🇷 · S.S. Nagorny🇨🇦 · S. Nisi🇮🇹 · C. Nones🇫🇷 and 6 other authors

   The first detailed study on the performance of a ZnO-based cryogenic scintillating bolometer as a detector to search for rare processes in zinc isotopes was performed. A 7.2 g ZnO low-temperature detector, containing more than 80\% of zinc in its mass, exhibits good energy resolution of baseline noise 1.0--2.7 keV FWHM at various working temperatures resulting in a low-energy threshold for the experiment, 2.0--6.0 keV. The light yield for $\beta$/$\gamma$ events was measured as 1.5(3) keV/MeV, while it varies for $\alpha$ particles in the range of 0.2--3.0 keV/MeV. The detector demonstrate an effective identification of the $\beta$/$\gamma$ events from $\alpha$ events using time-properties of only heat signals. %(namely, Rise time parameter). The radiopurity of the ZnO crystal was evaluated using the Inductively Coupled Plasma Mass Spectrometry, an ultra-low-background High Purity Ge $\gamma$-spectrometer, and bolometric measurements. Only limits were set at the level of $\mathcal{O}$(1--100) mBq/kg on activities of \Nuc{K}{40}, \Nuc{Cs}{137} and daughter nuclides from the U/Th natural decay chains. The total internal $\alpha$-activity was calculated to be 22(2) mBq/kg, with a major contribution caused by 6(1) mBq/kg of \Nuc{Th}{232} and 12(2) mBq/kg of \Nuc{U}{234}. Limits on double beta decay (DBD) processes in \Nuc{Zn}{64} and \Nuc{Zn}{70} isotopes were set on the level of $\mathcal{O}(10^{17}$--$10^{18})$ yr for various decay modes profiting from 271 h of acquired background data in the above-ground lab. This study shows a good potential for ZnO-based scintillating bolometers to search for DBD processes of Zn isotopes, especially in \Nuc{Zn}{64}, with the most prominent spectral features at $\sim$10--20 keV, like the two neutrino double electron capture. A 10 kg-scale experiment can reach the experimental sensitivity at the level of $\mathcal{O}(10^{24})$ yr.

   ↳ physics.ins-detnucl-exJINST(2023)·4 citations
3. 03*

   Thermodynamics of a rotating hadron resonance gas with van der Waals interaction

   Kshitish Kumar Pradhan🇮🇳 · Bhagyarathi Sahoo🇮🇳 · Dushmanta Sahu🇮🇳 · Raghunath Sahoo🇮🇳

   Studying the thermodynamics of the systems produced in ultra-relativistic heavy-ion collisions is crucial in understanding the QCD phase diagram. Recently, a new avenue has opened regarding the implications of large initial angular momentum and subsequent vorticity in the medium evolution in high-energy collisions. This adds a new type of chemical potential into the partonic and hadronic systems, called the rotational chemical potential. We study the thermodynamics of an interacting hadronic matter under rotation, formed in an ultra-relativistic collision. We introduce attractive and repulsive interactions through the van der Waals equation of state. Thermodynamic properties like the pressure ($P$), energy density ($\epsilon$), entropy density ($s$), trace anomaly ($(\epsilon -3P)/T^4$), specific heat ($c_{\mathrm{v}}$) and squared speed of sound ($c_{\mathrm{s}}^2$) are studied as functions of temperature ($T$) for zero and finite rotation chemical potential. The conserved charge fluctuations, which can be quantified by their respective susceptibilities, are also studied. The rotational (spin) density corresponding to the rotational chemical potential is explored. In addition, we explore the possible liquid-gas phase transition in the hadron gas with van der Waals interaction in the $T$ -- $\omega$ phase space.

   ↳ hep-phhep-exnucl-exnucl-thEPJC(2024)·32 citations
4. 04*

   $\nu$DoBe -- A Python Tool for Neutrinoless Double Beta Decay

   Oliver Scholer🇩🇪 · Jordy de Vries🇳🇱 · Lukáš Gráf🇺🇸

   We present $\nu$DoBe, a Python tool for the computation of neutrinoless double beta decay ($0\nu \beta \beta$) rates in terms of lepton-number-violating operators in the Standard Model Effective Field Theory (SMEFT). The tool can be used for automated calculations of $0\nu \beta \beta$ rates, electron spectra and angular correlations for all isotopes of experimental interest, for lepton-number-violating operators up to and including dimension 9. The tool takes care of renormalization-group running to lower energies and provides the matching to the low-energy effective field theory and, at lower scales, to a chiral effective field theory description of $0\nu \beta \beta$ rates. The user can specify different sets of nuclear matrix elements from various many-body methods and hadronic low-energy constants. The tool can be used to quickly generate analytical and numerical expressions for $0\nu \beta \beta$ rates and to generate a large variety of plots. In this work, we provide examples of possible use along with a detailed code documentation. The code can be accessed through: GitHub: https://github.com/OScholer/nudobe Online User-Interface: https://nudobe.streamlit.app

   ↳ hep-phhep-exnucl-exnucl-thJHEP(2023)·30 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.