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Impact of the Coulomb field on charged-pion spectra in few-GeV heavy-ion collisions

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cris.lastimport.scopus2024-02-12T20:20:04Z
dc.abstract.enIn nuclear collisions the incident protons generate a Coulomb field which acts on produced charged particles. The impact of these interactions on charged-pion transverse-mass and rapidity spectra, as well as on pion–pion momentum correlations is investigated in Au + Au collisions at sNN−−−√ = 2.4 GeV. We show that the low-mt region (mt<0.2 GeV/c2) can be well described with a Coulomb-modified Boltzmann distribution that also takes changes of the Coulomb field during the expansion of the fireball into account. The observed centrality dependence of the fitted mean Coulomb potential energy deviates strongly from a A2/3part scaling, indicating that, next to the fireball, the non-interacting charged spectators have to be taken into account. For the most central collisions, the Coulomb modifications of the HBT source radii are found to be consistent with the potential extracted from the single-pion transverse-mass distributions. This finding suggests that the region of homogeneity obtained from two-pion correlations coincides with the region in which the pions freeze-out. Using the inferred mean-square radius of the charge distribution at freeze-out, we have deduced a baryon density, in fair agreement with values obtained from statistical hadronization model fits to the particle yields.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorMatulewicz, Tomasz
dc.contributor.authorPiasecki, Krzysztof
dc.contributor.authorZumbruch, P.
dc.contributor.authorZanevsky, Y.
dc.contributor.authorWirth, J.
dc.contributor.authorWiebusch, M. G.
dc.contributor.authorWendisch, C.
dc.contributor.authorWagner, V.
dc.contributor.authorUsenko, E.
dc.contributor.authorTsertos, H.
dc.contributor.authorTraxler, M.
dc.contributor.authorTlusty, P.
dc.contributor.authorSzala, M.
dc.contributor.authorSvoboda, O.
dc.contributor.authorSumara, K.
dc.contributor.authorSturm, C.
dc.contributor.authorStroth, J.
dc.contributor.authorStröbele, H.
dc.contributor.authorSpies, S.
dc.contributor.authorSpataro, S.
dc.contributor.authorSobolev, Yu. G.
dc.contributor.authorSmyrski, J.
dc.contributor.authorSingh, U.
dc.contributor.authorSilva, L.
dc.contributor.authorSiebenson, J.
dc.contributor.authorSelyuzhenkov, I.
dc.contributor.authorSellheim, P.
dc.contributor.authorSeck, F.
dc.contributor.authorScozzi, F.
dc.contributor.authorSchwab, E.
dc.contributor.authorSchuldes, H.
dc.contributor.authorSchild, N.
dc.contributor.authorScheib, T.
dc.contributor.authorSalabura, P.
dc.contributor.authorSadovsky, A.
dc.contributor.authorRustamov, A.
dc.contributor.authorRost, A.
dc.contributor.authorRosier, P.
dc.contributor.authorRodriguez-Ramos, P.
dc.contributor.authorReshetin, A.
dc.contributor.authorRathod, N.
dc.contributor.authorRamstein, B.
dc.contributor.authorRamos, S.
dc.contributor.authorPysz, Krzysztof
dc.contributor.authorPrzygoda, W.
dc.contributor.authorPietraszko, J.
dc.contributor.authorPetukhov, O.
dc.contributor.authorPechenova, O.
dc.contributor.authorPechenov, V.
dc.contributor.authorParschau, M.
dc.contributor.authorParpottas, Y.
dc.contributor.authorNowakowski, K.
dc.contributor.authorNaumann, L.
dc.contributor.authorNabroth, M.
dc.contributor.authorMünzer, R.
dc.contributor.authorMüntz, C.
dc.contributor.authorMorozov, S.
dc.contributor.authorMihaylov, D. M.
dc.contributor.authorMichel, J.
dc.contributor.authorMetag, V.
dc.contributor.authorMaurus, S.
dc.contributor.authorMarkert, J.
dc.contributor.authorMangiarotti, A.
dc.contributor.authorMalige, A.
dc.contributor.authorMaier, L.
dc.contributor.authorMahmoud, T.
dc.contributor.authorLorenz, M.
dc.contributor.authorLopes, L.
dc.contributor.authorLinev, S.
dc.contributor.authorLebedev, A.
dc.contributor.authorLapidus, K.
dc.contributor.authorLalik, R.
dc.contributor.authorLadygin, V.
dc.contributor.authorKurilkin, P.
dc.contributor.authorKurilkin, A.
dc.contributor.authorKurepin, A.
dc.contributor.authorKunz, T.
dc.contributor.authorKugler, A.
dc.contributor.authorKotte, R.
dc.contributor.authorKornas, F.
dc.contributor.authorKornakov, G.
dc.contributor.authorKorcyl, G.
dc.contributor.authorKolb, B. W.
dc.contributor.authorKohls, M.
dc.contributor.authorKoenig, W.
dc.contributor.authorKoenig, I.
dc.contributor.authorKardan, B.
dc.contributor.authorKaravicheva, T.
dc.contributor.authorKämpfer, B.
dc.contributor.authorIvashkin, A.
dc.contributor.authorIerusalimov, A.
dc.contributor.authorHolzmann, R.
dc.contributor.authorHöhne, C.
dc.contributor.authorHlavac, S.
dc.contributor.authorHennino, T.
dc.contributor.authorHeinz, T.
dc.contributor.authorHarabasz, S.
dc.contributor.authorGumberidze, M.
dc.contributor.authorGuber, F.
dc.contributor.authorGreifenhagen, R.
dc.contributor.authorGolubeva, M.
dc.contributor.authorGernhäuser, R.
dc.contributor.authorGarzón, J. A.
dc.contributor.authorGalatyuk, T.
dc.contributor.authorFröhlich, I.
dc.contributor.authorFriese, J.
dc.contributor.authorFranco, C.
dc.contributor.authorFonte, P.
dc.contributor.authorFilip, P.
dc.contributor.authorFateev, O.
dc.contributor.authorFabbietti, L.
dc.contributor.authorEpple, E.
dc.contributor.authorDreyer, J.
dc.contributor.authorDeveaux, C.
dc.contributor.authorCiepał, Izabela
dc.contributor.authorChlad, L.
dc.contributor.authorChernenko, S.
dc.contributor.authorBordalo, P.
dc.contributor.authorBöhmer, M.
dc.contributor.authorBlume, C.
dc.contributor.authorBlanco, A.
dc.contributor.authorBerger-Chen, J. C.
dc.contributor.authorBelyaev, A.
dc.contributor.authorBelounnas, A.
dc.contributor.authorBehnke, C.
dc.contributor.authorArnold, O.
dc.contributor.authorAdamczewski-Musch, J.
dc.date.accessioned2024-01-25T03:57:09Z
dc.date.available2024-01-25T03:57:09Z
dc.date.copyright2022-09-02
dc.date.issued2022
dc.description.accesstimeAT_PUBLICATION
dc.description.financePublikacja bezkosztowa
dc.description.number9
dc.description.versionFINAL_PUBLISHED
dc.description.volume58
dc.identifier.doi10.1140/EPJA/S10050-022-00796-6
dc.identifier.issn1434-6001
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/109040
dc.identifier.weblinkhttps://link.springer.com/article/10.1140/epja/s10050-022-00796-6
dc.languageeng
dc.pbn.affiliationphysical sciences
dc.relation.ispartofEuropean Physical Journal A
dc.relation.pages166
dc.rightsCC-BY
dc.sciencecloudnosend
dc.subject.enPLUS AU COLLISIONS
dc.subject.enLOW-ENERGY PIONS
dc.subject.enINTENSITY INTERFEROMETRY
dc.subject.enPARTICLE SPECTRA
dc.subject.en1.23A GEV
dc.subject.enDEPENDENCE
dc.subject.enPHYSICS
dc.subject.enKCL
dc.subject.enAR
dc.titleImpact of the Coulomb field on charged-pion spectra in few-GeV heavy-ion collisions
dc.typeJournalArticle
dspace.entity.typePublication