Measurements of pi ^pm , K^pm , p and {bar{text {p}}} spectra in proton-proton interactions at 20, 31, 40, 80 and 158\xa0text{ GeV }/c with the NA61/SHINE spectrometer at the CERN SPS

A Aduszkiewicz,R Renfordt,A Krasnoperov,P Dorosz,D Veberič,W Rauch,V Kovalenko,M Ćirković,O Wyszyński,A E Hervé,M Baszczyk,W Kucewicz,G Vesztergombi,K Schmidt,A Wickremasinghe,Ł Mik,M Deveaux,C Wilkinson,F Guber,D Larsen,N Knezević,S Puławski,Y Ali,D Röhrich,M Naskręt,K Grebieszkow,R Płaneta,H Ströbele,A Rybicki,V Ozvenchuk,R Ulrich,M Słodkowski,S Kowalski,A Kurepin,M Maćkowiak-Pawłowska,T Šuša,V Matveev,L Turko,J Puzović,D Manić,K Kadija,A Snoch,T Czopowicz,R Rameika,S Mrówczyński,M Gaździcki,A Ereditato,Z Włodarczyk,V A Kireyeu,M Posiadała,M Golubeva,B Łysakowski,Y Nagai,M Roth,I Selyuzhenkov,L Vinogradov,Maciej Piotr Lewicki ,B Maksiak,A Bravar,M Walewski,A Tefelska,C François ,E Richter-Wąs ,R Engel,A Rustamov,E D Zimmerman,P Seyboth,Á László ,A Malakhov ,Г Феофилов ,V Vechernin ,M Pavin,A Wojtaszek-Szwarć ,B Baatar,G L Melkumov,H Cherif,E Rondio,A Ivashkin,M Bogomilov,P Podlaski,Evgeny Andronov ,D Kolev,A Yu Seryakov ,S Johnson ,Б Popov ,E Kaptur,D Tefelski,B T Rumberger,H J Mathes ,J Brzychczyk,K Kowalik,M Strikhanov,S Bhosale,M Ravonel,В Терещенко ,Z Fodor,B Lundberg,A Blondel,A Korzenev,A Sadovsky,M Rybczyński ,J Hylen,T Antičić ,A O Merzlaya ,V Kolesnikov ,W Dominik,V Kondratiev ,G Stefanek,V P Klochkov ,A Taranenko,M Unger,K Márton ,S V Morozov ,A D Marino,R Tsenov,S N Igolkin ,N Davis,J Dumarchez,V Paolone,T Matulewicz,L Zambelli,A Haesler,B Messerly,A V Brandin ,A Damyanova,P Staszel,O Busygina,M M Kielbowicz ,M Kuich,M Kozieł ,C Pistillo,A Toia,V Lyubushkin ,M Szuba,G B Mills,A Marchionni,J Steṕaniak ,А А Гарибов ,A Marcinek,H.-P Dembinski ,S.a Bunyatov ,O Petukhov,R Zwaska

doi:10.1140/epjc/s10052-017-5260-4

Abstract

Measurements of inclusive spectra and mean multiplicities of pi ^pm , K^pm , p and {bar{text {p}}} produced in inelastic p + p interactions at incident projectile momenta of 20, 31, 40, 80 and 158 text{ GeV }/c (sqrt{s} = 6.3, 7.7, 8.8, 12.3 and 17.3 text{ GeV }, 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.

Highlights

This paper presents experimental results on inclusive spectra and mean multiplicities of π ±, K±, p and pproduced in inelastic p + p interactions at 20, 31, 40, 80 and 158 GeV/c
The programme is mainly motivated by the observation of rapid changes of hadron production properties in central Pb + Pb collisions at about 30A GeV/c by the NA49 experiment [5,6] which were interpreted as the onset of deconfinement
Spectra and multiplicities of π +, π −, K+, K−, p and pproduced in inelastic p + p interactions were measured with the NA61/SHINE spectrometer at beam momenta of 20, 31, 40, 80, 158 GeV/c at the CERN Super Proton Synchrotron (SPS)

Summary

Introduction

This paper presents experimental results on inclusive spectra and mean multiplicities of π ±, K±, p and pproduced in inelastic p + p interactions at 20, 31, 40, 80 and 158 GeV/c. The new measurements complement previously published results from the same datasets on π − production [3] obtained without particle identification as well as on fluctuations of charged particles [4] These studies form part of the NA61/SHINE strong interaction programme investigating the properties of the onset of deconfinement and searching for the critical point of strongly interacting matter. The programme is mainly motivated by the observation of rapid changes of hadron production properties in central Pb + Pb collisions at about 30A GeV/c by the NA49 experiment [5,6] which were interpreted as the onset of deconfinement These findings were recently confirmed by the RHIC beam energy programme [7] and the interpretation is supported by the LHC results A two dimensional scan in collision energy and size of colliding nuclei is required to explore systematically the phase diagram of strongly interacting matter [9]

Methods

Results

Conclusion