László Gyulai, Gábor Bíró, Róbert Vértesi, Gergely Gábor Barnaföldi
{"title":"How far can we see back in time in high-energy collisions using charm hadrons?","authors":"László Gyulai, Gábor Bíró, Róbert Vértesi, Gergely Gábor Barnaföldi","doi":"10.1088/1361-6471/ad59b9","DOIUrl":null,"url":null,"abstract":"We use open charm production to estimate how far we can see back in time in high-energy hadron-hadron collisions. We analyze the transverse momentum distributions of the identified D mesons from pp, p–Pb and A–A collisions at the ALICE and STAR experiments covering the energy range from <inline-formula>\n<tex-math>\n<?CDATA $\\sqrt{{s}_{\\mathrm{NN}}}=200\\,\\mathrm{GeV}$?>\n</tex-math>\n<mml:math overflow=\"scroll\"><mml:msqrt><mml:mrow><mml:msub><mml:mrow><mml:mi>s</mml:mi></mml:mrow><mml:mrow><mml:mi>NN</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:msqrt><mml:mo>=</mml:mo><mml:mn>200</mml:mn><mml:mspace width=\"0.25em\"></mml:mspace><mml:mi>GeV</mml:mi></mml:math>\n<inline-graphic xlink:href=\"jpgad59b9ieqn1.gif\" xlink:type=\"simple\"></inline-graphic>\n</inline-formula> up to 7 TeV. Within a non-extensive statistical framework, the common Tsallis parameters for D mesons represent higher temperature and more degrees of freedom than that of light-flavour hadrons. Assuming Bjorken-expansion, the production of D mesons corresponds to a significantly earlier proper time, <italic toggle=\"yes\">τ</italic>\n<sub>D</sub> = (0.18 ± 0.06)<italic toggle=\"yes\">τ</italic>\n<sub>LF</sub>.","PeriodicalId":16766,"journal":{"name":"Journal of Physics G: Nuclear and Particle Physics","volume":"78 1","pages":""},"PeriodicalIF":3.4000,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Physics G: Nuclear and Particle Physics","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1088/1361-6471/ad59b9","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"PHYSICS, NUCLEAR","Score":null,"Total":0}
引用次数: 0
Abstract
We use open charm production to estimate how far we can see back in time in high-energy hadron-hadron collisions. We analyze the transverse momentum distributions of the identified D mesons from pp, p–Pb and A–A collisions at the ALICE and STAR experiments covering the energy range from sNN=200GeV up to 7 TeV. Within a non-extensive statistical framework, the common Tsallis parameters for D mesons represent higher temperature and more degrees of freedom than that of light-flavour hadrons. Assuming Bjorken-expansion, the production of D mesons corresponds to a significantly earlier proper time, τD = (0.18 ± 0.06)τLF.
期刊介绍:
Journal of Physics G: Nuclear and Particle Physics (JPhysG) publishes articles on theoretical and experimental topics in all areas of nuclear and particle physics, including nuclear and particle astrophysics. The journal welcomes submissions from any interface area between these fields.
All aspects of fundamental nuclear physics research, including:
nuclear forces and few-body systems;
nuclear structure and nuclear reactions;
rare decays and fundamental symmetries;
hadronic physics, lattice QCD;
heavy-ion physics;
hot and dense matter, QCD phase diagram.
All aspects of elementary particle physics research, including:
high-energy particle physics;
neutrino physics;
phenomenology and theory;
beyond standard model physics;
electroweak interactions;
fundamental symmetries.
All aspects of nuclear and particle astrophysics including:
nuclear physics of stars and stellar explosions;
nucleosynthesis;
nuclear equation of state;
astrophysical neutrino physics;
cosmic rays;
dark matter.
JPhysG publishes a variety of article types for the community. As well as high-quality research papers, this includes our prestigious topical review series, focus issues, and the rapid publication of letters.