Eur. Phys. J. C (2017) 77: 59
https://doi.org/10.1140/epjc/s10052-017-4599-x

Regular Article - Experimental Physics

Two-particle correlations in azimuthal angle and pseudorapidity in inelastic p + p interactions at the CERN Super Proton Synchrotron

¹ National Nuclear Research Center, Baku, Azerbaijan
² Faculty of Physics, University of Sofia, Sofia, Bulgaria
³ Ruđer Bošković Institute, Zagreb, Croatia
⁴ LPNHE, University of Paris VI and VII, Paris, France
⁵ Karlsruhe Institute of Technology, Karlsruhe, Germany
⁶ Fachhochschule Frankfurt, Frankfurt, Germany
⁷ University of Frankfurt, Frankfurt, Germany
⁸ University of Athens, Athens, Greece
⁹ Wigner Research Centre for Physics of the Hungarian Academy of Sciences, Budapest, Hungary
¹⁰ Institute for Particle and Nuclear Studies, Tsukuba, Japan
¹¹ University of Bergen, Bergen, Norway
¹² Jan Kochanowski University in Kielce, Kielce, Poland
¹³ H. Niewodniczański Institute of Nuclear Physics of the Polish Academy of Sciences, Kraków, Poland
¹⁴ National Centre for Nuclear Research, Warsaw, Poland
¹⁵ Jagiellonian University, Cracow, Poland
¹⁶ University of Silesia, Katowice, Poland
¹⁷ University of Warsaw, Warsaw, Poland
¹⁸ University of Wrocław, Wrocław, Poland
¹⁹ Warsaw University of Technology, Warsaw, Poland
²⁰ Institute for Nuclear Research, Moscow, Russia
²¹ Joint Institute for Nuclear Research, Dubna, Russia
²² National Research Nuclear University (Moscow Engineering Physics Institute), Moscow, Russia
²³ St. Petersburg State University, St. Petersburg, Russia
²⁴ University of Belgrade, Belgrade, Serbia
²⁵ ETH Zürich, Zürich, Switzerland
²⁶ University of Bern, Bern, Switzerland
²⁷ University of Geneva, Geneva, Switzerland
²⁸ Fermilab, Batavia, USA
²⁹ Los Alamos National Laboratory, Los Alamos, USA
³⁰ University of Colorado, Boulder, USA
³¹ University of Pittsburgh, Pittsburgh, USA
³² COMSATS Institute of Information Technology, Islamabad, Pakistan

^* e-mail: maksiak@if.pw.edu.pl

Received: 4 October 2016
Accepted: 1 January 2017
Published online: 30 January 2017

Abstract

Results on two-particle correlations in inelastic p + p interactions at 20, 31, 40, 80, and 158 GeV/c are presented. The measurements were performed using the large acceptance NA61/SHINE hadron spectrometer at the CERN Super Proton Synchrotron. The data show structures which can be attributed mainly to effects of resonance decays, momentum conservation, and quantum statistics. The results are compared with the Epos and UrQMD models.