Tue·Jul 12, 2022Tuesday·July 12, 2022

1. 01*

   High $Q^2$ electron-proton elastic scattering at the future Electron-Ion Collider

   B. Schmookler🇺🇸 · A. Pierre-Louis🇺🇸 · A. Deshpande🇺🇸 · D. Higinbotham🇺🇸 · E. Long🇺🇸 · A. J. R. Puckett🇺🇸

   Unpolarized electron-proton elastic scattering cross-section measurements at high $Q^2$ allow for improved extractions of the proton electromagnetic form factors as well as provide constraints on possible hard two-photon exchange effects. We present a detailed study of the feasibility of making these high $Q^2$ e-p elastic measurements at the future Electron-Ion Collider (EIC). The results show that e-p elastic cross sections can be obtained in the momentum transfer range of $6(GeV/c{)}^2<Q^2<40(GeV/c{)}^2$, which would be the highest-ever $Q^2$ values measured. These data will all be at virtual photon polarizations close to unity, $ϵ\sim 1$.

   nucl-ex7 citations
2. 02*

   Rebuttal to: "Comment on Scaling properties of background- and chiral-magnetically-driven charge separation in heavy ion collisions at ${\sqrt{s}}_{\mathrm{NN}}=200$ GeV"

   Roy A. Lacey🇺🇸 · Niseem Magdy (Depts. of Chemistry and Physics, Stony Brook University, Stony Brook, New York, USA)🇺🇸

   Recently, F. Wang commented on our work "Scaling properties of background- and chiral-magnetically-driven charge separation in heavy ion collisions at ${\sqrt{s}}_{\mathrm{NN}}=200$ GeV" and made several claims to support his conclusion that our results are fallacious. His conclusion and claims are not only incorrect; they show a fundamental disconnect with the rudiments of the $R_{{\Psi }_2}(\Delta S)$ correlator. This rebuttal addresses the root misconception responsible for Wang's false claims.

   nucl-exhep-exhep-phnucl-th0 citations
3. 03*

   Measuring differential flow angle fluctuations in relativistic nuclear collisions

   Niseem Magdy🇺🇸

   Recently studies of the differential nature of the flow angle fluctuations, known as event plane angular decorrelation, indicated that measurements that assume a common symmetry plane may need to consider the flow angle fluctuations effect. Using the HIJING and AMPT models, it is shown that the flow angle fluctuations measurements, obtained with the two- and three-subevents correlation method, could have significant non-flow effects associated with long- and short-range non-flow correlations. The current study demonstrates the four-subevents cumulant methods' ability to reduce the non-flow effects. It is further argued that the measurements using the four-subevents correlation method can be used to provide accurate quantification of the differential flow angle fluctuations.

   ↳ nucl-thhep-exhep-phnucl-exPRC(2022)·10 citations
4. 04*

   ${}^7$H ground state as a ${}^3$H+4n resonance

   Emiko Hiyama🇯🇵 · Rimantas Lazauskas🇫🇷 · Jaume Carbonell🇫🇷

   We have investigated the possible existence of a ${}^7$H resonant state, considered as a five-body system consisting of a ${}^3$H core with four valence neutrons. To this aim, an effective n-${}^3$H potential is constructed in order to reproduce the low energy elastic neutron scattering on ${}^3$H phase shifts and the ${}^5$H resonant ground state in terms of ${}^3$H-n-n system. The variational Gaussian Expansion Method is used to solve the 5-body Schrödinger equation, while the resonant state parameters were estimated by means of the stabilization method. We have not found any sign of a narrow low energy resonance in the vicinity of ${}^3$H+4n threshold. However, we have identified a very broad structure at $E_R\approx 9$ MeV above this threshold, which corresponds to the ${}^7$H J${}^{\pi }$=1/2${}^{+}$ ground state. In the vicinity of this state, we have also identified a broad structure corresponding to the ground state of ${}^6$H isotope with quantum numbers $J^{\pi }=2^{-}$.

   ↳ nucl-thhep-phnucl-exPLB(2022)·7 citations
5. 05*

   Splitting of proton-antiproton directed flow in relativistic heavy-ion collisions

   Piotr Bozek🇵🇱

   The rapidity dependent directed flow of particles produced in a relativistic heavy ion collision can be generated in the hydrodynamic expansion of a tilted source. The asymmetry of the pressure leads to a build up of a directed flow of matter with respect to the collision axis. The experimentally observed ordering of the directed flow of baryons, pions and antibaryons can be described as resulting from the expansion of a baryon inhomogeneous fireball. An uneven distribution of baryons in the transverse plane leads to an asymmetry in the collective push for protons and antiprotons. Precise measurements of the collective flow as a function of rapidity could serve as a strong constraint on mechanism of baryon stopping in the early phase of the collision.

   ↳ nucl-thhep-phnucl-exPRC(2022)·31 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.