https://doi.org/10.1140/epjc/s10052-017-5260-4
Regular Article - Experimental Physics
Measurements of 
, K
, p and 
spectra in proton-proton interactions at 20, 31, 40, 80 and 158 
with the NA61/SHINE spectrometer at the CERN SPS
The NA61/SHINE Collaboration
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
Wigner Research Centre for Physics of the Hungarian Academy of Sciences, Budapest, Hungary
9
University of Bergen, Bergen, Norway
10
Jan Kochanowski University in Kielce, Kielce, Poland
11
H. Niewodniczański Institute of Nuclear Physics of the Polish Academy of Sciences, Kraków, Poland
12
National Centre for Nuclear Research, Warsaw, Poland
13
Jagiellonian University, Kraków, Poland
14
University of Science and Technology, Kraków, Poland
15
University of Silesia, Katowice, Poland
16
University of Warsaw, Warsaw, Poland
17
University of Wrocław, Wrocław, Poland
18
Warsaw University of Technology, Warsaw, Poland
19
Institute for Nuclear Research, Moscow, Russia
20
Joint Institute for Nuclear Research, Dubna, Russia
21
National Research Nuclear University (Moscow Engineering Physics Institute), Moscow, Russia
22
St. Petersburg State University, St. Petersburg, Russia
23
University of Belgrade, Belgrade, Serbia
24
University of Bern, Bern, Switzerland
25
University of Geneva, Geneva, Switzerland
26
Fermilab, Batavia, USA
27
Los Alamos National Laboratory, Los Alamos, USA
28
University of Colorado, Boulder, USA
29
University of Pittsburgh, Pittsburgh, USA
* e-mail: szymon.pulawski@us.edu.pl
Received:
9
May
2017
Accepted:
26
September
2017
Published online:
10
October
2017
Measurements of inclusive spectra and mean multiplicities of , K, p and produced in inelastic p + p interactions at incident projectile momenta of 20, 31, 40, 80 and 158 (
6.3, 7.7, 8.8, 12.3 and 17.3 
, respectively) were performed at the CERN Super Proton Synchrotron using the large acceptance NA61/SHINE hadron spectrometer. Spectra are presented as function of rapidity and transverse momentum and are compared to predictions of current models. The measurements serve as the baseline in the NA61/SHINE study of the properties of the onset of deconfinement and search for the critical point of strongly interacting matter.
© The Author(s), 2017
