https://doi.org/10.1140/epjc/s10052-021-09631-6
Regular Article - Experimental Physics
Measurements of 
and 
production in proton–proton interactions at 
= 17.3 
in the NA61/SHINE experiment
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
University of Frankfurt, Frankfurt, Germany
7
Wigner Research Centre for Physics of the Hungarian Academy of Sciences, Budapest, Hungary
8
University of Bergen, Bergen, Norway
9
Jan Kochanowski University in Kielce, Kielce, Poland
10
Institute of Nuclear Physics, Polish Academy of Sciences, Cracow, Poland
11
National Centre for Nuclear Research, Warsaw, Poland
12
Jagiellonian University, Cracow, Poland
13
AGH-University of Science and Technology, Cracow, Poland
14
University of Silesia, Katowice, Poland
15
University of Warsaw, Warsaw, Poland
16
University of Wrocław, Wrocław, Poland
17
Warsaw University of Technology, Warsaw, Poland
18
Institute for Nuclear Research, Moscow, Russia
19
Joint Institute for Nuclear Research, Dubna, Russia
20
National Research Nuclear University (Moscow Engineering Physics Institute), Moscow, Russia
21
St. Petersburg State University, St. Petersburg, Russia
22
University of Belgrade, Belgrade, Serbia
23
University of Geneva, Geneva, Switzerland
24
Fermilab, Batavia, USA
25
University of Colorado, Boulder, USA
26
University of Pittsburgh, Pittsburgh, USA
Received:
19
May
2021
Accepted:
7
September
2021
Published online:
16
October
2021
Double-differential yields of and resonances produced in p+p interactions were measured at a laboratory beam momentum of 158 
. This measurement is the first of its kind in p+p interactions below LHC energies. It was performed at the CERN SPS by the NA61/SHINE collaboration. Double-differential distributions in rapidity and transverse momentum were obtained from a sample of 
inelastic events. The spectra are extrapolated to full phase space resulting in mean multiplicity of (
and (
. The rapidity and transverse momentum spectra and mean multiplicities were compared to predictions of string-hadronic and statistical model calculations.
© The Author(s) 2021
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