Multiplicity and transverse momentum fluctuations in inelastic proton–proton interactions at the CERN Super Proton Synchrotron

Tobiasz Czopowicz , Krzysztof Dynowski , Katarzyna Grebieszkow , K Kowalik , Michał Kozieł , Marek Lewicki , Maja Maćkowiak-Pawłowska , Bartosz Maksiak , Magdalena Posiadała , Elżbieta Richter-Wąs , M Roth , Marek Rybczyński , Rafał Sarnecki , Marcin Słodkowski , Joanna Stepaniak , Dariusz Tefelski , A. Wilczek , Zbigniew Włodarczyk , Angelika Tefelska


Measurements of multiplicity and transverse momentum fluctuations of charged particles were performed in inelastic p+p interactions at 20, 31, 40, 80, and 158 GeV/c beam momentum. Results for the scaled variance of the multiplicity distribution and for three strongly intensive measures of multiplicity and transverse momentum fluctuations Δ[ PT, N] , Σ[ PT, N] and ΦpT are presented. For the first time the results on fluctuations are fully corrected for experimental biases. The results on multiplicity and transverse momentum fluctuations significantly deviate from expectations for the independent particle production. They also depend on charges of selected hadrons. The string-resonance Monte Carlo models Epos and Urqmd do not describe the data. The scaled variance of multiplicity fluctuations is significantly higher in inelastic p+p interactions than in central Pb+Pb collisions measured by NA49 at the same energy per nucleon. This is in qualitative disagreement with the predictions of the Wounded Nucleon Model. Within the statistical framework the enhanced multiplicity fluctuations in inelastic p+p interactions can be interpreted as due to event-by-event fluctuations of the fireball energy and/or volume.
Collective authorA. Aduszkiewicz, Y. Ali, E. Andronov, T. Antićić, N. Antoniou, B. Baatar, F. Bay, A. Blond.....
Author Tobiasz Czopowicz (FP / NPD)
Tobiasz Czopowicz,,
- Nuclear Physics Division
, Krzysztof Dynowski (FP / NPD)
Krzysztof Dynowski,,
- Nuclear Physics Division
, Katarzyna Grebieszkow (FP / NPD)
Katarzyna Grebieszkow,,
- Nuclear Physics Division
, K Kowalik
K Kowalik,,
, Michał Kozieł
Michał Kozieł,,
, Marek Lewicki
Marek Lewicki,,
, Maja Maćkowiak-Pawłowska (FP / NPD)
Maja Maćkowiak-Pawłowska,,
- Nuclear Physics Division
, Bartosz Maksiak (FP / NPD)
Bartosz Maksiak,,
- Nuclear Physics Division
, Magdalena Posiadała
Magdalena Posiadała,,
, Elżbieta Richter-Wąs - Uniwersytet Jagielloński w Krakowie (UJ)
Elżbieta Richter-Wąs,,
et al.`
Total number of authors132
Journal seriesEuropean Physical Journal C, ISSN 1434-6044, e-ISSN 1434-6052
Issue year2016
ASJC Classification3101 Physics and Astronomy (miscellaneous); 2201 Engineering (miscellaneous)
Languageen angielski
Score (nominal)40
Score sourcejournalList
ScoreMinisterial score = 40.0, 09-01-2020, ArticleFromJournal
Ministerial score (2013-2016) = 40.0, 09-01-2020, ArticleFromJournal
Publication indicators Scopus Citations = 16; WoS Citations = 9; Scopus SNIP (Source Normalised Impact per Paper): 2016 = 1.823; WoS Impact Factor: 2016 = 5.331 (2) - 2016=4.759 (5)
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