Measurement of phi meson production in p + p interactions at 40, 80 and 158 , hbox {GeV}/c with the NA61/SHINE spectrometer at the CERN SPS

A Aduszkiewicz,W Bryliński,J Puzović,Z Włodarczyk,M Baszczyk,S N Igolkin,K Grebieszkow,A Krasnoperov,V A Kireyeu,A Rybicki,S Mrówczyński,K Schmidt,I Selyuzhenkov,R Renfordt,S Kowalski,F Guber,D Veberič,M Naskręt,R Płaneta,V Matveev,Ł Mik,H Ströbele,A Kurepin,T Šuša,R Ulrich,K Kadija,M Posiadała-Zezula,A Dmitriev,D Manić,V Golovatyuk,W Kucewicz,M Słodkowski,A Wickremasinghe,B Łysakowski,O Wyszyński,M Deveaux,M Ćirković,D Röhrich,V Ozvenchuk,K Łojek,L Turko,P Dorosz,M Roth,S Puławski,M Maćkowiak-Pawłowska,Y Nagai,M Gaździcki,D Larsen,T Czopowicz,M Golubeva,Z Majka,E Kashirin,A Yu Seryakov,A Tefelska,Ф Ф Валиев ,B Pórfy ,A V Brandin ,J Steṕaniak ,V Vechernin ,В Коваленко ,H J Mathes ,Б Popov ,Н Каргин ,V P Klochkov ,A Wojtaszek-Szwarć ,E Richter-Wąs ,M Kozieł ,M Rybczyński ,M Csanád ,M M Kielbowicz ,S V Morozov ,V Kolesnikov ,T Lazareva ,А А Гарибов ,S Johnson ,T Antičić ,Adam Bzdak ,V Lyubushkin ,A Malakhov ,Evgeny Andronov ,Maciej Piotr Lewicki ,В Терещенко ,Г Феофилов ,K Márton ,Á László ,A Damyanova,E D Zimmerman,D Kolev,N Davis,B Maksiak,V Babkin,A Ivashkin,M Deliyergiyev,S Bhosale,G L Melkumov,J Dumarchez,P Staszel,A Taranenko,P Seyboth,A Toia,M Buryakov,M Rumyantsev,L Zambelli,D Tefelski,R Engel,H Cherif,A Haesler,R Tsenov,O Petukhov,M Strikhanov,A Korzenev,A Sadovsky,M Unger,A D Marino,A Blondel,O Golosov,L Fields,A O Merzlaya,A Marchionni,E Rondio,A Bravar,P Podlaski,B Messerly,S Ilieva,K Kowalik,M Kuich,Z Fodor,E Kaptur,T Matulewicz,J Brzychczyk,D S Prokhorova,O Busygina,B T Rumberger,G Stefanek,W Dominik,V Paolone,A Marcinek,J Cybowska,D Pszczel,M Ravonel,A Rustamov,M Pavin,M Bogomilov,R Zwaska

doi:10.1140/epjc/s10052-020-7675-6

Abstract

Results on phi meson production in inelastic p + p collisions at CERN SPS energies are presented. They are derived from data collected by the NA61/SHINE fixed target experiment, by means of invariant mass spectra fits in the phi rightarrow K^+ K^- decay channel. They include the first ever measured double differential spectra of phi mesons as a function of rapidity y and transverse momentum p_{text {T}} for proton beam momenta of 80 , hbox {GeV}/c and 158 , hbox {GeV}/c, as well as single differential spectra of y or p_{text {T}} for beam momentum of 40 , hbox {GeV}/c. The corresponding total phi yields per inelastic p + p event are obtained. These results are compared with existing data on phi meson production in p + p collisions. The comparison shows consistency but superior accuracy of the present measurements. The emission of phi mesons in p + p reactions is confronted with that occurring in mathrm{Pb} + mathrm{Pb} collisions, and the experimental results are compared with model predictions. It appears that none of the considered models can properly describe all the experimental observations.

Highlights

Production of φ mesons has been measured in colliding systems ranging from e− + e+ to Pb + Pb reactions, and at energies from GSI SIS to CERN LHC accelerators
In this paper double differential yields of φ mesons produced in proton–proton collisions at 80 GeV/c and 158 GeV/c as well as single differential yields at 40 GeV/c are presented and compared with published experimental data on p + p interactions [9,10,11,12,13,14,15,16,17,18,19,20], and on Pb + Pb collisions at the same energy [21]
Yields of φ mesons have been determined as function of transverse momentum and rapidity in p + p interactions at beam momenta of 158 GeV/c and 80 GeV/c

Summary

Introduction

Production of φ mesons has been measured in colliding systems ranging from e− + e+ to Pb + Pb reactions, and at energies from GSI SIS to CERN LHC accelerators. For the purpose of the comparison between p+ p and Pb+ Pb reactions, the present analysis operates on multiplicities of φ mesons produced per inelastic p+ p collision rather than cross-sections. Note that the latter can be transformed into the former using tables of total (σtot) and elastic (σel) proton– proton cross-sections as a function of collision energy [22]: n= σ ,

Methods

Results

Conclusion