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arxiv: 2503.22484 · v2 · pith:LSAJKZKX · submitted 2025-03-28 · nucl-ex

Multiplicity and net-electric charge fluctuations in central Ar+Sc interactions at 13A, 19A, 30A, 40A, 75A, and 150A GeV/c beam momenta measured by NA61/SHINE at the CERN SPS

H. Adhikary , P. Adrich , K.K. Allison , N. Amin , E.V. Andronov , I.-C. Arsene , M. Bajda , Y. Balkova
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D. Battaglia A. Bazgir S. Bhosale M. Bielewicz A. Blondel M. Bogomilov Y. Bondar W. Bryli\'nski J. Brzychczyk M. Buryakov A.F. Camino Y.D. Chandak M. \'Cirkovi\'c M. Csan\'ad J. Cybowska T. Czopowicz C. Dalmazzone N. Davis A. Dmitriev P. von Doetinchem W. Dominik J. Dumarchez R. Engel G.A. Feofilov L. Fields Z. Fodor M. Friend M. Ga\'zdzicki K.E. Gollwitzer O. Golosov V. Golovatyuk M. Golubeva K. Grebieszkow F. Guber P.G. Hurh S. Ilieva A. Ivashkin N. Karpushkin M. Kie{\l}bowicz V.A. Kireyeu R. Kolesnikov D. Kolev Y. Koshio S. Kowalski B. Koz{\l}owski A. Krasnoperov W. Kucewicz M. Kuchowicz M. Kuich A. L\'aszl\'o M. Lewicki G. Lykasov J.R. Lyon V.V. Lyubushkin M. Ma\'ckowiak-Paw{\l}owska B. Maksiak A.I. Malakhov A. Marcinek A.D. Marino H.-J. Mathes T. Matulewicz V. Matveev G.L. Melkumov A. Merzlaya {\L}. Mik S. Morozov Y. Nagai T. Nakadaira S. Nishimori A. Olivier V. Ozvenchuk O. Panova V. Paolone I. Pidhurskyi R. P{\l}aneta P. Podlaski B.A. Popov B. P\'orfy D.S. Prokhorova D. Pszczel S. Pu{\l}awski L. Ren V.Z. Reyna Ortiz D. R\"ohrich M. Roth {\L}. Rozp{\l}ochowski M. Rumyantsev A. Rustamov M. Rybczynski A. Rybicki D. Rybka K. Sakashita K. Schmidt P. Seyboth U.A. Shah Y. Shiraishi A. Shukla M. S{\l}odkowski P. Staszel G. Stefanek J. Stepaniak {\L}. \'Swiderski J. Szewi\'nski R. Szukiewicz A. Taranenko A. Tefelska D. Tefelski V. Tereshchenko R. Tsenov L. Turko T.S. Tveter M. Unger M. Urbaniak D. Veberi\v{c} O. Vitiuk A. Wickremasinghe K. Witek K. W\'ojcik O. Wyszy\'nski A. Zaitsev E. Zherebtsova E.D. Zimmerman A. Zviagina
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keywords resultsfluctuationsinteractionsmultiplicityanalysisbeamcentralcharge
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This paper presents results on multiplicity fluctuations of positively and negatively charged hadrons as well as net-electric charge fluctuations measured in central Ar+Sc interactions at beam momenta 13A, 19A, 30A, 40A, 75A, and 150A GeV/c. The fluctuation analysis is one of the tools to search for the predicted critical point of strongly interacting matter. Results are corrected for the experimental biases and quantified using cumulant ratios. In most instances, multiplicity and net-charge distributions appear narrower than the corresponding Poisson or Skellam distributions. Cumulant ratios are compared with the EPOS1.99 model predictions, which provide a qualitative description that aligns with observations for positively and negatively charged particles. The obtained results are also compared to earlier NA61/SHINE results from inelastic p+p interactions in the same analysis acceptance.

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