Wed·Oct 24, 2018Wednesday·October 24, 2018

1. 01*

   Simulation studies of ${\mathrm{R}}_2(\mathrm{\Delta }\eta ,\mathrm{\Delta }\phi )$ and ${\mathrm{P}}_2(\mathrm{\Delta }\eta ,\mathrm{\Delta }\phi )$ correlation functions in pp collisions with the PYTHIA and HERWIG models

   Baidyanath Sahoo🇮🇳 · Basanta Kumar Nandi🇮🇳 · Prabhat Pujahari🇮🇳 · Sumit Basu🇺🇸 · Claude Pruneau🇺🇸

   We report studies of charge-independent (CI) and charge-dependent (CD) two-particle differential-number correlation functions, ${\mathrm{R}}_2(\mathrm{\Delta }\eta ,\mathrm{\Delta }\phi )$, and transverse momentum ($p_{\mathrm{T}}$) correlation functions, ${\mathrm{P}}_2(\mathrm{\Delta }\eta ,\mathrm{\Delta }\phi )$, of charged particles in $\sqrt{\text{s}}$ = 2.76 TeV pp collisions with the PYTHIA and HERWIG models. Model predictions are presented for inclusive charged hadrons ($h^{\pm }$), as well as pions (${\pi }^{\pm }$), kaons (K${}^{\pm }$), and (anti-)protons ($\bar{\mathrm{p}}$/p) in the ranges $0.2<{\text{p}}_{\mathrm{T}}\le 2.0\mathrm{GeV}/\text{c}$, $2.0<{\text{p}}_{\mathrm{T}}\le 5.0\mathrm{GeV}/\text{c}$, and $5.0<{\text{p}}_{\mathrm{T}}\le 30.0\mathrm{GeV}/\text{c}$, with full azimuthal coverage in the range $|\eta |<1.0$. We compare the model predictions for the strength and shape of the ${\mathrm{R}}_2$ and ${\mathrm{P}}_2$ correlators as these pertain to recent measurements by the ALICE collaboration. The ${\mathrm{R}}_2$ and ${\mathrm{P}}_2$ correlation functions estimated with PYTHIA and HERWIG exhibit qualitatively similar near-side and away-side correlation structures but feature important differences. Our analysis indicates that comparative studies of ${\mathrm{R}}_2$ and ${\mathrm{P}}_2$ correlation functions would provide valuable insight towards the understanding of particle production in pp collisions, and by extension, should also be useful in studies of heavy-ion collisions. Comparison of the $\Delta \eta$ dependence of ${\mathrm{R}}_2$ and ${\mathrm{P}}_2$ could contribute, in particular, to a better understanding and modeling of the angular ordering of particles produced by hadronization in jets, as well as a better description of jet fragmentation functions of identified species at low momentum fraction $(z)$.

   nucl-exhep-exhep-phnucl-thPRC(2019)·13 citations
2. 02*

   One- and two- neutron halo at the dripline. From 11Be to 11Li and back: 10Li and parity inversion

   R. A. Broglia🇮🇹 · F. Barranco🇪🇸 · G. Potel🇺🇸 · E. Vigezzi🇮🇹

   The nuclei 11Be and 11Li provide paradigmatic examples of one-and two- neutron halo systems. Because the reaction 1H(11Li,9Li)3H is dominated by successive transfer, one can use the quantitative picture emerging from a nu- clear field theory description of the structure and reaction mechanism of the above Cooper pair transfer process and of the 2H(10Be,11Be)1H and 1H(11Be,10Be)2H reactions, to shed light on the structure of 10Li. This analysis provides important support for a parity inverted scenario with a 1/2+ virtual state at about 0.2 MeV.

   ↳ nucl-thnucl-exCERN Proc.(2019)·0 citations
3. 03*

   Neutrino recoil force in electron-capture decay of polarized nuclei: measurement prospects and potential applications

   A.L. Barabanov🇷🇺 · O.A. Titov🇷🇺

   Due to a directional asymmetry of neutrino emission caused by parity violation, a sample of radioactive atoms experiences a small recoil force from neutrino radiation accompanying electron capture by polarized nuclei. An expression for this force is obtained for the case of allowed nuclear transitions. Prospects to measure this force by the use of modern micromechanical devices are considered. Numerical estimates for the force are presented for a number of most suitable radioactive isotopes. Potential applications for the weak interaction studies are discussed including the possibility to search for hypothetical Lorentz invariance violation.

   ↳ nucl-thhep-phnucl-exPRC(2019)·3 citations
4. 04*

   Light and heavy flavor dijet production and dijet mass modification in heavy ion collisions

   Zhong-Bo Kang🇺🇸 · Jared Reiten🇺🇸 · Ivan Vitev🇺🇸 · Boram Yoon🇺🇸

   Back-to-back light and heavy flavor dijet measurements are promising experimental channels to accurately study the physics of jet production and propagation in a dense QCD medium. They can provide new insights into the path length, color charge, and mass dependence of quark and gluon energy loss in the quark-gluon plasma produced in reactions of ultra-relativistic nuclei. To this end, we perform a comprehensive study of both light and heavy flavor dijet production in heavy ion collisions. We propose the modification of dijet invariant mass distributions in such reactions as a novel observable that shows enhanced sensitivity to the QGP transport properties and heavy quark mass effects on in-medium parton showers. This is achieved through the addition of the jet quenching effects on the individual jets as opposed to their subtraction. The latter drives the subtle effects on more conventional observables, such as the dijet momentum imbalance shifts, which we also calculate here. Results are presented in Pb+Pb collisions at $\sqrt{s_{NN}}$ = 5.02 TeV for comparison to data at the Large Hadron Collider and in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV to guide the future sPHENIX program at the Relativistic Heavy Ion Collider.

   ↳ hep-phhep-exnucl-exnucl-thPRD(2019)·28 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.