arXiv - PHYS - Nuclear Experiment最新文献

{"title":"Recent heavy-flavour measurements from ALICE","authors":"Jonghan Parkfor the ALICE Collaboration","doi":"arxiv-2407.13056","DOIUrl":"https://doi.org/arxiv-2407.13056","url":null,"abstract":"Studying heavy-flavour mesons and baryons in hadronic collisions provides\u0000unique insights into the properties of heavy-quark hadronisation amid large\u0000partonic densities, where novel mechanisms beyond in-vacuum fragmentation may\u0000emerge. Examining heavy-flavour production across different collision systems\u0000and event multiplicities provides information about multi-parton interactions\u0000and the development of a strongly-interacting medium in high-multiplicity pp\u0000and p-Pb collisions. In Pb-Pb collisions, measurements of the nuclear\u0000modification factor ($R_{rm AA}$) for charm and beauty hadrons provide a means\u0000to characterise the in-medium energy loss of heavy quarks in the quark-gluon\u0000plasma (QGP). In addition, measurements of the elliptic flow ($v_{2}$) for\u0000heavy quarks provide insights into their diffusion and their participation in\u0000the collective motion of the QGP. In this contribution, recent results of charm\u0000and beauty production measured with the ALICE detector are presented.","PeriodicalId":501206,"journal":{"name":"arXiv - PHYS - Nuclear Experiment","volume":"2013 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141737312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Measurement of beauty production via non-prompt charm hadrons in p-Pb collisions at $sqrt{s_{mathrm{NN}}} = 5.02$ TeV","authors":"ALICE Collaboration","doi":"arxiv-2407.10593","DOIUrl":"https://doi.org/arxiv-2407.10593","url":null,"abstract":"The production cross sections of $mathrm {D^0}$, $mathrm {D^+}$, and\u0000$mathrm {Lambda_{c}^{+}}$ hadrons originating from beauty-hadron decays (i.e.\u0000non-prompt) were measured for the first time at midrapidity in proton$-$lead\u0000(p$-$Pb) collisions at the center-of-mass energy per nucleon pair of\u0000$sqrt{s_{mathrm{NN}}} = 5.02$ TeV. Nuclear modification factors ($R_{mathrm\u0000{pPb}}$) of non-prompt $mathrm {D^0}$, $mathrm {D^+}$, and $mathrm\u0000{Lambda_{c}^{+}}$ are calculated as a function of the transverse momentum\u0000($p_{mathrm T}$) to investigate the modification of the momentum spectra\u0000measured in p$-$Pb collisions with respect to those measured in proton$-$proton\u0000(pp) collisions at the same energy. The $R_{mathrm {pPb}}$ measurements are\u0000compatible with unity and with the measurements in the prompt charm sector, and\u0000do not show a significant $p_{mathrm T}$ dependence. The $p_{mathrm\u0000T}$-integrated cross sections and $p_{mathrm T}$-integrated $R_{mathrm\u0000{pPb}}$ of non-prompt $mathrm {D^0}$ and $mathrm {D^+}$ mesons are also\u0000computed by extrapolating the visible cross sections down to $p_{mathrm T}$ =\u00000. The non-prompt D-meson $R_{mathrm {pPb}}$ integrated over $p_{mathrm T}$\u0000is compatible with unity and with model calculations implementing modification\u0000of the parton distribution functions of nucleons bound in nuclei with respect\u0000to free nucleons. The non-prompt $mathrm {Lambda_{c}^{+}/D^{0}}$ and\u0000$mathrm{D^+/D^0}$ production ratios are computed to investigate hadronisation\u0000mechanisms of beauty quarks into mesons and baryons. The measured ratios as a\u0000function of $p_{mathrm T}$ display a similar trend to that measured for charm\u0000hadrons in the same collision system.","PeriodicalId":501206,"journal":{"name":"arXiv - PHYS - Nuclear Experiment","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141719912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"First Measurement of Solar $^8$B Neutrino Flux through Coherent Elastic Neutrino-Nucleus Scattering in PandaX-4T","authors":"PandaX Collaboration, Zihao Bo, Wei Chen, Xun Chen, Yunhua Chen, Zhaokan Cheng, Xiangyi Cui, Yingjie Fan, Deqing Fang, Zhixing Gao, Lisheng Geng, Karl Giboni, Xunan Guo, Xuyuan Guo, Zichao Guo, Chencheng Han, Ke Han, Changda He, Jinrong He, Di Huang, Houqi Huang, Junting Huang, Ruquan Hou, Yu Hou, Xiangdong Ji, Xiangpan Ji, Yonglin Ju, Chenxiang Li, Jiafu Li, Mingchuan Li, Shuaijie Li, Tao Li, Zhiyuan Li, Qing Lin, Jianglai Liu, Congcong Lu, Xiaoying Lu, Lingyin Luo, Yunyang Luo, Wenbo Ma, Yugang Ma, Yajun Mao, Yue Meng, Xuyang Ning, Binyu Pang, Ningchun Qi, Zhicheng Qian, Xiangxiang Ren, Dong Shan, Xiaofeng Shang, Xiyuan Shao, Guofang Shen, Manbin Shen, Wenliang Sun, Yi Tao, Anqing Wang, Guanbo Wang, Hao Wang, Jiamin Wang, Lei Wang, Meng Wang, Qiuhong Wang, Shaobo Wang, Siguang Wang, Wei Wang, Xiuli Wang, Xu Wang, Zhou Wang, Yuehuan Wei, Weihao Wu, Yuan Wu, Mengjiao Xiao, Xiang Xiao, Kaizhi Xiong, Yifan Xu, Shunyu Yao, Binbin Yan, Xiyu Yan, Yong Yang, Peihua Ye, Chunxu Yu, Ying Yuan, Zhe Yuan, Youhui Yun, Xinning Zeng, Minzhen Zhang, Peng Zhang, Shibo Zhang, Shu Zhang, Tao Zhang, Wei Zhang, Yang Zhang, Yingxin Zhang, Yuanyuan Zhang, Li Zhao, Jifang Zhou, Jiaxu Zhou, Jiayi Zhou, Ning Zhou, Xiaopeng Zhou, Yubo Zhou, Zhizhen Zhou","doi":"arxiv-2407.10892","DOIUrl":"https://doi.org/arxiv-2407.10892","url":null,"abstract":"The PandaX-4T liquid xenon detector at the China Jinping Underground\u0000Laboratory is used to measure the solar $^8$B neutrino flux by detecting\u0000neutrinos through coherent scattering with xenon nuclei. Data samples requiring\u0000the coincidence of scintillation and ionization signals (paired), as well as\u0000unpaired ionization-only signals (US2), are selected with energy threshold of\u0000approximately 1.1 keV (0.33 keV) nuclear recoil energy. Combining the\u0000commissioning run and the first science run of PandaX-4T, a total exposure of\u00001.25 and 1.04 tonne$cdot$year are collected for the paired and US2,\u0000respectively. After unblinding, 3 and 332 events are observed with an\u0000expectation of 2.8$pm$0.5 and 251$pm$32 background events, for the paired and\u0000US2 data, respectively. A combined analysis yields a best-fit $^8$B neutrino\u0000signal of 3.5 (75) events from the paired (US2) data sample, with $sim$37%\u0000uncertainty, and the background-only hypothesis is disfavored at 2.64$sigma$\u0000significance. This gives a solar $^8$B neutrino flux of\u0000($8.4pm3.1$)$times$10$^6$ cm$^{-2}$s$^{-1}$, consistent with the standard\u0000solar model prediction. This is the first indication of solar $^8$B neutrino\u0000``fog'' in a dark matter direct detection experiment.","PeriodicalId":501206,"journal":{"name":"arXiv - PHYS - Nuclear Experiment","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141719914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rapidity dependence of antideuteron coalescence in pp collisions at $sqrt{s}$ = 13 TeV with ALICE","authors":"ALICE Collaboration","doi":"arxiv-2407.10527","DOIUrl":"https://doi.org/arxiv-2407.10527","url":null,"abstract":"The production yields of antideuterons and antiprotons are measured in pp\u0000collisions at a center-of-mass energy of $sqrt{s}=13$ TeV, as a function of\u0000transverse momentum ($p_{rm T}$) and rapidity ($y$), for the first time up to\u0000$|y|= 0.7$. The measured spectra are used to study the $p_{rm T}$ and rapidity\u0000dependence of the coalescence parameter $B_2$, which quantifies the coalescence\u0000probability of antideuterons. The $p_{rm T}$ and rapidity dependence of the\u0000obtained $B_2$ is extrapolated for $p_{rm T}> 1.7$ GeV/$c$ and $|y|>0.7$ using\u0000the phenomenological antideuteron production model implemented in PYTHIA 8.3 as\u0000well as a baryon coalescence afterburner model based on EPOS 3. Such\u0000measurements are of interest to the astrophysics community, since they can be\u0000used for the calculation of the flux of antinuclei from cosmic rays, in\u0000combination with coalescence models.","PeriodicalId":501206,"journal":{"name":"arXiv - PHYS - Nuclear Experiment","volume":"77 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141722299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Decay study of $^{11}$Be with an Optical TPC detector","authors":"N. Sokołowska, V. Guadilla, C. Mazzocchi, R. Ahmed, M. Borge, G. Cardella, A. A. Ciemny, L. G. Cosentino, E. De Filippo, V. Fedosseev, A. Fijałkowska, L. M. Fraile, E. Geraci, A. Giska, B. Gnoffo, C. Granados, Z. Janas, Ł. Janiak, K. Johnston, G. Kamiński, A. Korgul, A. Kubiela, C. Maiolino, B. Marsh, N. S. Martorana, K. Miernik, P. Molkanov, J. D. Ovejas, E. V. Pagano, S. Pirrone, M. Pomorski, A. M. Quynh, K. Riisager, A. Russo, P. Russotto, A. Świercz, S. Viñals, S. Wilkins, M. Pfützner","doi":"arxiv-2407.09846","DOIUrl":"https://doi.org/arxiv-2407.09846","url":null,"abstract":"The $beta$ decay of one-neutron halo nucleus $^{11}$Be was investigated\u0000using the Warsaw Optical Time Projection Chamber (OTPC) detector to measure\u0000$beta$-delayed charged particles. The results of two experiments are reported.\u0000In the first one, carried out in LNS Catania, the absolute branching ratio for\u0000$beta$-delayed $alpha$ emission was measured by counting incoming $^{11}$Be\u0000ions stopped in the detector and the observed decays with the emission of\u0000$alpha$ particle. The result of 3.27(46)% is in good agreement with the\u0000literature value. In the second experiment, performed at the HIE-ISOLDE\u0000facility at CERN, bunches containing several hundreds of $^{11}$Be ions were\u0000implanted into the OTPC detector followed by the detection of decays with the\u0000emission of charged particles. The energy spectrum of $beta$-delayed $alpha$\u0000particles was determined in the full energy range. It was analysed in the\u0000R-matrix framework and was found to be consistent with the literature. The best\u0000description of the spectrum was obtained assuming that the two $3/2^+$ and one\u0000$1/2^+$ states in $^{11}$B are involved in the transition. The search for\u0000$beta$-delayed emission of protons was undertaken. Only the upper limit for\u0000the branching ratio for this process of $(2.2 pm 0.6_{rm stat} pm 0.6_{rm\u0000sys}) times 10^{-6}$ could be determined. This value is in conflict with the\u0000result published in [Ayyad et al. Phys. Rev. Lett. 123, 082501 (2019)] but does\u0000agree with the limit reported in [Riisager et al., Eur. Phys. J. A (2020)\u000056:100]","PeriodicalId":501206,"journal":{"name":"arXiv - PHYS - Nuclear Experiment","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141719913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Emergence of High-Order Deformation in Rotating Transfermium Nuclei: A Microscopic Understanding","authors":"F. F. Xu, Y. K. Wang, Y. P. Wang, P. Ring, P. W. Zhao","doi":"arxiv-2407.08996","DOIUrl":"https://doi.org/arxiv-2407.08996","url":null,"abstract":"The rotational properties of the transfermium nuclei are investigated in the\u0000full deformation space by implementing a shell-model-like approach in the\u0000cranking covariant density functional theory on a three-dimensional lattice,\u0000where the pairing correlations, deformations, and moments of inertia are\u0000treated in a microscopic and self-consistent way. The kinematic and dynamic\u0000moments of inertia of the rotational bands observed in the transfermium nuclei\u0000$^{252}$No, $^{254}$No, $^{254}$Rf, and $^{256}$Rf are well reproduced without\u0000any adjustable parameters using a well-determined universal density functional.\u0000It is found for the first time that the emergence of the octupole deformation\u0000should be responsible for the significantly different rotational behavior\u0000observed in $^{252}$No and $^{254}$No. The present results provide a\u0000microscopic solution to the long-standing puzzle on the rotational behavior in\u0000No isotopes, and highlight the risk of investigating only the hexacontetrapole\u0000($beta_{60}$) deformation effects in rotating transfermium nuclei without\u0000considering the octupole deformation.","PeriodicalId":501206,"journal":{"name":"arXiv - PHYS - Nuclear Experiment","volume":"74 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141719915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Photoproduction of the ${^{55-57}}$Co nuclei on ${^{rm nat}}$Ni at the bremsstrahlung end-point energy of 35-94 MeV","authors":"I. S. Timchenko O. S. Deiev, S. M. Olejnik, S. M. Potin, V. A. Kushnir, V. V. Mytrochenko, S. A. Perezhogin, A. Herzáň","doi":"arxiv-2407.09245","DOIUrl":"https://doi.org/arxiv-2407.09245","url":null,"abstract":"Production of the ${^{55-57}}$Co nuclei on ${^{rm nat}}$Ni in photonuclear\u0000reactions using bremsstrahlung gamma photon irradiation with end-point energy\u0000$E_{rm{gamma max}}$ between 35 and 94~MeV has been studied. The experiment\u0000was performed at the electron linear accelerator LUE-40 NSC KIPT using the\u0000methods of $gamma$ activation and off-line $gamma$-ray spectroscopy. The\u0000obtained experimental flux-averaged cross-sections\u0000$langle{sigma(E_{rm{gamma max}})}rangle$ agree with the data found in\u0000literature. The theoretical flux-averaged cross-sections\u0000$langle{sigma(E_{rm{gamma max}})}rangle_{rm{th}}$ for the production of\u0000${^{55-57}}$Co and ${^{55-57}}$Ni were estimated using the cross-section values\u0000$sigma(E)$ from the TALYS1.95 code and bremsstrahlung spectra of gamma photons\u0000calculated by GEANT4.9.2. The experimental results for ${^{56,57}}$Co agree\u0000with the cumulative $langle{sigma(E_{rm{gamma max}})}rangle_{rm{th}}$.\u0000However theoretical prediction fails to reproduce the measured cross-sections\u0000for the production of ${^{55}}$Co.","PeriodicalId":501206,"journal":{"name":"arXiv - PHYS - Nuclear Experiment","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141722301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cross-sections of photoneutron reaction $^{rm nat}$Mo($γ,x$n)$^{rm 93m}$Mo at the bremsstrahlung energy up to 95 MeV","authors":"I. S. Timchenko, O. S. Deiev, S. M. Olejnik, S. M. Potin, V. A. Kushnir, V. V. Mytrochenko, S. A. Perezhogin","doi":"arxiv-2407.09085","DOIUrl":"https://doi.org/arxiv-2407.09085","url":null,"abstract":"The photoproduction of the $^{rm 93m}$Mo nucleus on natural molybdenum was\u0000studied using the electron beam of the LUE-40 linac RDC \"Accelerator\" NSC KIPT.\u0000Measurements were performed using the activation method and off-line\u0000$gamma$-ray spectrometric technique. For the $^{rm nat}$Mo($gamma,x$n)$^{rm\u000093m}$Mo reaction the experimental flux-averaged cross-section <$sigma(E_{rm\u0000gamma max})$>$_rm m$ at the bremsstrahlung end-point energy range of 38--93\u0000MeV was first time determined. The theoretical values of the yields $Y_{rm\u0000m,g}(E_{rm gamma max})$ and flux-averaged cross-sections <$sigma(E_{rm\u0000gamma max})$>$_{rm m,g}$ for the $^{rm nat}$Mo($gamma,x$n)$^{rm 93m,g}$Mo\u0000reactions were calculated using the cross-sections $sigma(E_{rm gamma})$\u0000from the TALYS1.96 code for different gamma strength functions and level\u0000density models. The comparison showed strong discrepancies between the\u0000experimental values and the theoretical results of <$sigma(E_{rm gamma\u0000max})$>$_m$.","PeriodicalId":501206,"journal":{"name":"arXiv - PHYS - Nuclear Experiment","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141719850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Coherent J/$ψ$ photoproduction and polarization in peripheral Pb-Pb collisions with ALICE","authors":"L. Massacrierfor the ALICE Collaboration","doi":"arxiv-2407.09707","DOIUrl":"https://doi.org/arxiv-2407.09707","url":null,"abstract":"Photonuclear reactions are induced by the strong electromagnetic field\u0000generated by ultrarelativistic heavy ions. These processes have been\u0000extensively studied in ultraperipheral collisions. In recent years, the\u0000observation of coherent J/$psi$ photoproduction has been claimed in\u0000nucleus-nucleus (A-A) collisions with nuclear overlap, based on the measurement\u0000of an excess in the very low transverse momentum ($p_{rm T}$) J/$psi$ yield.\u0000Such quarkonium measurements can help constraining the nuclear gluon\u0000distribution at low Bjorken-$x$ and can shed light on the theory behind photon\u0000induced reactions in A-A collisions with nuclear overlap. In order to confirm\u0000the photoproduction origin of the very low-$p_{rm T}$ J/$psi$ yield excess,\u0000polarization measurement is a golden observable. It is indeed expected that the\u0000produced quarkonium would keep the polarization of the incoming photon due to\u0000$s$-channel helicity conservation. ALICE can measure inclusive and exclusive\u0000quarkonium production down to zero transverse momentum, at forward rapidity\u0000(2.5 $< y <$ 4) and midrapidity ($|y| <$ 0.9). In this contribution, we will\u0000report on the new preliminary measurement of the $y$-differential cross section\u0000and the first polarization analysis at LHC of coherently photoproduced J/$psi$\u0000in peripheral Pb-Pb collisions. Both measurements are conducted at forward\u0000rapidity in the dimuon decay channel.","PeriodicalId":501206,"journal":{"name":"arXiv - PHYS - Nuclear Experiment","volume":"75 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141722300","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Centrality dependence of Lévy-stable two-pion Bose-Einstein correlations in $sqrt{s_{_{NN}}}=200$ GeV Au$+$Au collisions","authors":"PHENIX Collaboration, N. J. Abdulameer, U. Acharya, A. Adare, C. Aidala, N. N. Ajitanand, Y. Akiba, R. Akimoto, H. Al-Ta'ani, J. Alexander, A. Angerami, K. Aoki, N. Apadula, Y. Aramaki, H. Asano, E. C. Aschenauer, E. T. Atomssa, T. C. Awes, B. Azmoun, V. Babintsev, M. Bai, B. Bannier, K. N. Barish, B. Bassalleck, S. Bathe, V. Baublis, S. Baumgart, A. Bazilevsky, R. Belmont, R. Belmont, A. Berdnikov, Y. Berdnikov, L. Bichon, B. Blankenship, D. S. Blau, J. S. Bok, V. Borisov, K. Boyle, M. L. Brooks, H. Buesching, V. Bumazhnov, S. Butsyk, S. Campbell, P. Castera, C. -H. Chen, D. Chen, M. Chiu, C. Y. Chi, I. J. Choi, J. B. Choi, S. Choi, R. K. Choudhury, P. Christiansen, T. Chujo, O. Chvala, V. Cianciolo, Z. Citron, B. A. Cole, M. Connors, M. Connors, R. Corliss, M. Csanád, T. Csörgő, L. D'Orazio, S. Dairaku, A. Datta, M. S. Daugherity, G. David, A. Denisov, A. Deshpande, E. J. Desmond, K. V. Dharmawardane, O. Dietzsch, L. Ding, A. Dion, M. Donadelli, V. Doomra, O. Drapier, A. Drees, K. A. Drees, J. M. Durham, A. Durum, S. Edwards, Y. V. Efremenko, T. Engelmore, A. Enokizono, R. Esha, K. O. Eyser, B. Fadem, D. E. Fields, M. Finger, Jr., M. Finger, D. Firak, D. Fitzgerald, F. Fleuret, S. L. Fokin, J. E. Frantz, A. Franz, A. D. Frawley, Y. Fukao, T. Fusayasu, K. Gainey, C. Gal, A. Garishvili, I. Garishvili, A. Glenn, X. Gong, M. Gonin, Y. Goto, R. Granier de Cassagnac, N. Grau, S. V. Greene, M. Grosse Perdekamp, T. Gunji, L. Guo, T. Guo, H. -Å. Gustafsson, T. Hachiya, J. S. Haggerty, K. I. Hahn, H. Hamagaki, J. Hanks, K. Hashimoto, E. Haslum, R. Hayano, T. K. Hemmick, T. Hester, X. He, J. C. Hill, A. Hodges, R. S. Hollis, K. Homma, B. Hong, T. Horaguchi, Y. Hori, T. Ichihara, H. Iinuma, Y. Ikeda, J. Imrek, M. Inaba, A. Iordanova, D. Isenhower, M. Issah, D. Ivanishchev, B. V. Jacak, M. Javani, X. Jiang, Z. Ji, B. M. Johnson, K. S. Joo, D. Jouan, D. S. Jumper, J. Kamin, S. Kaneti, B. H. Kang, J. H. Kang, J. S. Kang, J. Kapustinsky, K. Karatsu, M. Kasai, G. Kasza, D. Kawall, A. V. Kazantsev, T. Kempel, A. Khanzadeev, K. M. Kijima, B. I. Kim, C. Kim, D. J. Kim, E. -J. Kim, H. J. Kim, K. -B. Kim, Y. -J. Kim, Y. K. Kim, E. Kinney, Á. Kiss, E. Kistenev, J. Klatsky, D. Kleinjan, P. Kline, Y. Komatsu, B. Komkov, J. Koster, D. Kotchetkov, D. Kotov, L. Kovacs, F. Krizek, A. Král, G. J. Kunde, B. Kurgyis, K. Kurita, M. Kurosawa, Y. Kwon, G. S. Kyle, Y. S. Lai, J. G. Lajoie, A. Lebedev, B. Lee, D. M. Lee, J. Lee, K. B. Lee, K. S. Lee, S. H. Lee, S. R. Lee, M. J. Leitch, M. A. L. Leite, M. Leitgab, B. Lewis, S. H. Lim, L. A. Linden Levy, M. X. Liu, S. Lökös, D. A. Loomis, B. Love, C. F. Maguire, Y. I. Makdisi, M. Makek, A. Manion, V. I. Manko, E. Mannel, S. Masumoto, M. McCumber, P. L. McGaughey, D. McGlinchey, C. McKinney, M. Mendoza, B. Meredith, Y. Miake, T. Mibe, A. C. Mignerey, A. Milov, D. K. Mishra, J. T. Mitchell, M. Mitrankova, Iu. Mitrankov, Y. Miyachi, S. Miyasaka, A. K. Mohanty, S. Mohapatra, H. J. Moon, D. P. Morrison, D. P. Morrison, S. Motschwiller, T. V. Moukhanova, B. Mulilo, T. Murakami, J. Murata, A. Mwai, T. Nagae, S. Nagamiya, J. L. Nagle, J. L. Nagle, M. I. Nagy, I. Nakagawa, Y. Nakamiya, K. R. Nakamura, T. Nakamura, K. Nakano, C. Nattrass, A. Nederlof, M. Nihashi, R. Nouicer, T. Novák, N. Novitzky, G. Nukazuka, A. S. Nyanin, E. O'Brien, C. A. Ogilvie, K. Okada, M. Orosz, A. Oskarsson, M. Ouchida, K. Ozawa, R. Pak, V. Pantuev, V. Papavassiliou, B. H. Park, I. H. Park, J. S. Park, S. Park, S. K. Park, L. Patel, S. F. Pate, H. Pei, J. -C. Peng, H. Pereira, D. Yu. Peressounko, R. Petti, C. Pinkenburg, R. P. Pisani, M. Potekhin, M. Proissl, M. L. Purschke, H. Qu, J. Rak, I. Ravinovich, K. F. Read, D. Reynolds, V. Riabov, Y. Riabov, E. Richardson, D. Richford, D. Roach, G. Roche, S. D. Rolnick, M. Rosati, B. Sahlmueller, N. Saito, T. Sakaguchi, V. Samsonov, M. Sano, M. Sarsour, S. Sawada, K. Sedgwick, R. Seidl, A. Sen, R. Seto, D. Sharma, I. Shein, T. -A. Shibata, K. Shigaki, M. Shimomura, K. Shoji, P. Shukla, A. Sickles, C. L. Silva, D. Silvermyr, K. S. Sim, B. K. Singh, C. P. Singh, C. P. Singh, V. Singh, M. Slunečka, K. L. Smith, R. A. Soltz, W. E. Sondheim, S. P. Sorensen, I. V. Sourikova, P. W. Stankus, E. Stenlund, M. Stepanov, A. Ster, S. P. Stoll, T. Sugitate, A. Sukhanov, J. Sun, Z. Sun, J. Sziklai, E. M. Takagui, A. Takahara, A. Taketani, Y. Tanaka, S. Taneja, K. Tanida, M. J. Tannenbaum, S. Tarafdar, A. Taranenko, E. Tennant, H. Themann, T. Todoroki, L. Tomášek, M. Tomášek, H. Torii, R. S. Towell, I. Tserruya, Y. Tsuchimoto, T. Tsuji, B. Ujvari, C. Vale, H. W. van Hecke, M. Vargyas, E. Vazquez-Zambrano, A. Veicht, J. Velkovska, M. Virius, A. Vossen, V. Vrba, E. Vznuzdaev, R. Vértesi, X. R. Wang, D. Watanabe, K. Watanabe, Y. Watanabe, Y. S. Watanabe, F. Wei, R. Wei, S. N. White, D. Winter, S. Wolin, C. L. Woody, M. Wysocki, B. Xia, Y. L. Yamaguchi, R. Yang, A. Yanovich, J. Ying, S. Yokkaichi, I. Younus, Z. You, I. E. Yushmanov, W. A. Zajc, A. Zelenski","doi":"arxiv-2407.08586","DOIUrl":"https://doi.org/arxiv-2407.08586","url":null,"abstract":"The PHENIX experiment measured the centrality dependence of two-pion\u0000Bose-Einstein correlation functions in $sqrt{s_{_{NN}}}=200$~GeV Au$+$Au\u0000collisions at the Relativistic Heavy Ion Collider at Brookhaven National\u0000Laboratory. The data are well represented by L'evy-stable source\u0000distributions. The extracted source parameters are the correlation-strength\u0000parameter $lambda$, the L'evy index of stability $alpha$, and the\u0000L'evy-scale parameter $R$ as a function of transverse mass $m_T$ and\u0000centrality. The $lambda(m_T)$ parameter is constant at larger values of $m_T$,\u0000but decreases as $m_T$ decreases. The L'evy scale parameter $R(m_T)$ decreases\u0000with $m_T$ and exhibits proportionality to the length scale of the nuclear\u0000overlap region. The L'evy exponent $alpha(m_T)$ is independent of $m_T$\u0000within uncertainties in each investigated centrality bin, but shows a clear\u0000centrality dependence. At all centralities, the L'evy exponent $alpha$ is\u0000significantly different from that of Gaussian ($alpha=2$) or Cauchy\u0000($alpha=1$) source distributions. Comparisons to the predictions of\u0000Monte-Carlo simulations of resonance-decay chains show that in all but the most\u0000peripheral centrality class (50%-60%), the obtained results are inconsistent\u0000with the measurements, unless a significant reduction of the in-medium mass of\u0000the $eta'$ meson is included. In each centrality class, the best value of the\u0000in-medium $eta'$ mass is compared to the mass of the $eta$ meson, as well as\u0000to several theoretical predictions that consider restoration of $U_A(1)$\u0000symmetry in hot hadronic matter.","PeriodicalId":501206,"journal":{"name":"arXiv - PHYS - Nuclear Experiment","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141609741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}