Measurement of negatively charged pion spectra in inelastic p+p interactions at \(p_{\mathbf {lab}}= \) 20, 31, 40, 80 and 158 GeV/c

The European Physical Journal C, Mar 2014

We present experimental results on inclusive spectra and mean multiplicities of negatively charged pions produced in inelastic p+p interactions at incident projectile momenta of 20, 31, 40, 80 and 158 GeV/c (\(\sqrt{s} = \) 6.3, 7.7, 8.8, 12.3 and 17.3 GeV, respectively). The measurements were performed using the large acceptance NA61/SHINE hadron spectrometer at the CERN super proton synchrotron. Two-dimensional spectra are determined in terms of rapidity and transverse momentum. Their properties such as the width of rapidity distributions and the inverse slope parameter of transverse mass spectra are extracted and their collision energy dependences are presented. The results on inelastic p+p interactions are compared with the corresponding data on central Pb+Pb collisions measured by the NA49 experiment at the CERN SPS. The results presented in this paper are part of the NA61/SHINE ion program devoted to the study of the properties of the onset of deconfinement and search for the critical point of strongly interacting matter. They are required for interpretation of results on nucleus–nucleus and proton–nucleus collisions.

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Measurement of negatively charged pion spectra in inelastic p+p interactions at \(p_{\mathbf {lab}}= \) 20, 31, 40, 80 and 158 GeV/c

NA /SHINE Collaboration N. Abgrall 16 A. Aduszkiewicz 15 Y. Ali 14 T. Anticic 21 N. Antoniou 20 B. Baatar 19 F. Bay 18 A. Blondel 16 J. Blumer 23 M. Bogomilov 22 A. Bravar 16 J. Brzychczyk 14 S. A.Bunyatov 19 O. Busygina 17 P. Christakoglou 20 T. Czopowicz 7 N. Davis 20 S. Debieux 16 H. Dembinski 23 F. Diakonos 20 S. Di Luise 18 W. Dominik 15 T. Drozhzhova 8 J. Dumarchez 5 K. Dynowski 7 R. Engel 23 A. Ereditato 6 G. A. Feofilov 8 Z. Fodor 3 A. Fulop 3 M. Gazdzicki 1 4 M. Golubeva 17 K. Grebieszkow 7 A. Grzeszczuk 2 F. Guber 17 A. Haesler 16 T. Hasegawa 0 M. Hierholzer 6 R. Idczak 10 S. Igolkin 8 A. Ivashkin 17 D. Jokovic 9 K. Kadija 21 A. Kapoyannis 20 E. Kaptur 2 D. Kieczewska 15 A. Korzenev 16 P. Kovesarki 10 S. Kowalski 2 A. Krasnoperov 19 A. Kurepin 17 D. Larsen 2 A. Lszl 3 V. V. Lyubushkin 19 M. Mackowiak-Pawowska 1 Z. Majka 14 B. Maksiak 7 A. I. Malakhov 19 D. Manic 9 A. Marcinek 14 V. Marin 17 K. Marton 3 H.-J. Mathes 23 T. Matulewicz 15 V. Matveev 17 19 G. L. Melkumov 19 St. Mrwczy nski 4 S. Murphy 16 T. Nakadaira 0 M. Nirkko 6 K. Nishikawa 0 T. Palczewski 12 G. Palla 3 A. D. Panagiotou 20 T. Paul 13 C. Pistillo 6 W. Peryt 7 O. Petukhov 17 R. Paneta 14 J. Pluta 7 B. A. Popov 5 19 M. Posiadaa 15 S. Puawski 2 J. Puzovic 9 W. Rauch M. Ravonel 16 A. Redij 6 R. Renfordt 1 A. Robert 5 D. Rhrich E. Rondio 12 M. Roth 23 A. Rubbia 18 A. Rustamov 1 M. Rybczy nski 4 A. Sadovsky 17 K. Sakashita 0 M. Savic 9 K. Schmidt 2 T. Sekiguchi 0 P. Seyboth 4 D. Sgalaberna 18 M. Shibata 0 R. Sipos 3 E. Skrzypczak 15 M. Sodkowski 7 P. Staszel 14 G. Stefanek 4 J. Stepaniak 12 H. Strbele 1 T. ua 21 M. Szuba 23 M. Tada 0 V. Tereshchenko 19 T. Tolyhi 3 R. Tsenov 22 L. Turko 10 R. Ulrich 23 M. Unger 23 M. Vassiliou 20 D. Veberic 13 V. V. Vechernin 8 G. Vesztergombi 3 L. Vinogradov 8 A. Wilczek 2 Z. Wodarczyk 4 A. Wojtaszek-Szwarc 4 0 High Energy Accelerator Research Organization (KEK) , Tsukuba, Ibaraki 305-0801, Japan 1 University of Frankfurt , Frankfurt, Germany 2 University of Silesia , Katowice, Poland 3 KFKI Research Institute for Particle and Nuclear Physics , Budapest, Hungary 4 Jan Kochanowski University in Kielce , Kielce, Poland 5 LPNHE, University of Paris VI and VII , Paris, France 6 University of Bern , Bern, Switzerland 7 Warsaw University of Technology , Warsaw, Poland 8 St. Petersburg State University , St. Petersburg, Russia 9 University of Belgrade , Belgrade, Serbia 10 University of Wrocaw , Wrocaw, Poland 11 University of California , Irvine, USA 12 National Centre for Nuclear Research , Warsaw, Poland 13 Laboratory of Astroparticle Physics, University Nova Gorica , Nova Gorica, Slovenia 14 Jagiellonian University , Cracow, Poland 15 Faculty of Physics, University of Warsaw , Warsaw, Poland 16 University of Geneva , Geneva, Switzerland 17 Institute for Nuclear Research , Moscow, Russia 18 ETH, Zurich, Switzerland 19 Joint Institute for Nuclear Research , Dubna, Russia 20 University of Athens , Athens, Greece 21 Rudjer Bokovic Institute , Zagreb, Croatia 22 Faculty of Physics, University of Sofia , Sofia, Bulgaria 23 Karlsruhe Institute of Technology , Karlsruhe, Germany - 25 Fachhochschule Frankfurt, Frankfurt, Germany 26 University of Bergen, Bergen, Norway Received: 14 October 2013 / Accepted: 21 February 2014 / Published online: 15 March 2014 The Author(s) 2014. This article is published with open access at Springerlink.com Abstract We present experimental results on inclusive spectra and mean multiplicities of negatively charged pions produced in inelastic p+p interactions at incident projectile momenta of 20, 31, 40, 80 and 158 GeV/c ( s = 6.3, 7.7, 8.8, 12.3 and 17.3 GeV, respectively). The measurements were performed using the large acceptance NA61/SHINE hadron spectrometer at the CERN super proton synchrotron. Two-dimensional spectra are determined in terms of rapidity and transverse momentum. Their properties such as the width of rapidity distributions and the inverse slope parameter of transverse mass spectra are extracted and their collision energy dependences are presented. The results on inelastic p+p interactions are compared with the corresponding data on central Pb+Pb collisions measured by the NA49 experiment at the CERN SPS. The results presented in this paper are part of the NA61/SHINE ion program devoted to the study of the properties of the onset of deconfinement and search for the critical point of strongly interacting matter. They are required for interpretation of results on nucleusnucleus and protonnucleus collisions. 1 Introduction This paper presents experimental results on inclusive spectra and mean multiplicities of negatively charged pions produced in inelastic p+p interactions at 20, 31, 40, 80 and 158 GeV/c. The measurements were performed by the multi-purpose NA61/SHINEthe SPS Heavy Ion and Neutrino Experiment [1]at the CERN Super Proton Synchrotron (SPS). They are part of the NA61/SHINE ion program devoted to the study of the properties of the onset of deconfinement (...truncated)


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N. Abgrall, A. Aduszkiewicz, Y. Ali, T. Anticic. Measurement of negatively charged pion spectra in inelastic p+p interactions at \(p_{\mathbf {lab}}= \) 20, 31, 40, 80 and 158 GeV/c, The European Physical Journal C, 2014, pp. 2794, Volume 74, Issue 3, DOI: 10.1140/epjc/s10052-014-2794-6