$K^{*}(892)^0$ meson production in inelastic $p+p$ interactions at 40 and 80 GeV/$c$ beam momenta measured by NA61/SHINE at the CERN SPS

A. Blondel; A. Brandin; A. Bravar; A. Damyanova; A.D. Marino; A. Dmitriev; A. Garibov; A. Haesler; A.I. Malakhov; A. Ivashkin

K^(*)(892)⁰ meson production in inelastic p+p interactions at 40 and 80 GeV/c beam momenta measured by NA61/SHINE at the CERN SPS

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arxiv 2112.09506 v2 pith:7UFUTNT3 submitted 2021-12-17 nucl-ex hep-ex

K^(*)(892)⁰ meson production in inelastic p+p interactions at 40 and 80 GeV/c beam momenta measured by NA61/SHINE at the CERN SPS

NA61/SHINE Collaboration: A. Acharya , H. Adhikary , K.K. Allison , N. Amin , E.V. Andronov , T. Anti\'ci\'c , I.-C. Arsene , M. Baszczyk

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D. Battagia S. Bhosale A. Blondel M. Bogomilov Y. Bondar N. Bostan A. Brandin A. Bravar W. Bryli\'nski J. Brzychczyk M. Buryakov M. \'Cirkovi\'c M. Csanad J. Cybowska T. Czopowicz A. Damyanova N. Davis A. Dmitriev W. Dominik P. Dorosz J. Dumarchez R. Engel G.A. Feofilov L. Fields Z. Fodor M. Friend A. Garibov M. Ga\'zdzicki O. Golosov V. Golovatyuk M. Golubeva K. Grebieszkow F. Guber A. Haesler S.N. Igolkin S. Ilieva A. Ivashkin A. Izvestnyy S.R. Johnson K. Kadija N. Kargin N. Karpushkin E. Kashirin M. Kie{\l}bowicz V.A. Kireyeu R. Kolesnikov D. Kolev A. Korzenev J. Koshio V.N. Kovalenko S. Kowalski B. Koz{\l}owski A. Krasnoperov W. Kucewicz M. Kuich A. Kurepin A. L\'aszl\'o M. Lewicki K. {\L}ojek G. Lykasov V.V. Lyubushkin M. Ma\'ckowiak-Paw{\l}owska Z. Majka A. Makhnev B. Maksiak A.I. Malakhov A. Marcinek A.D. Marino K. Marton H.-J. Mathes T. Matulewicz V. Matveev A. Matyja G.L. Melkumov A. Merzlaya A.O. Merzlaya B. Messerly {\L}. Mik S. Morozov Y. Nagai T. Nakadaira M. Naskr\k{e}t V. Ozvenchuk O. Panova V. Paolone O. Petukhov I. Pidhurskyi R. P{\l}aneta P. Podlaski B.A. Popov B. Porfy M. Posiada{\l}a-Zezula D.S. Prokhorova D. Pszczel S. Pu{\l}awski J. Puzovi\'c M. Ravonel R. Renfordt D. R\"ohrich E. Rondio M. Roth B.T. Rumberger M. Rumyantsev A. Rustamov M. Rybczynski A. Rybicki S. Sadhu K. Sakashita K. Schmidt I. Selyuzhenkov A.Yu. Seryakov P. Seyboth M. S{\l}odkowski P. Staszel G. Stefanek J. Stepaniak M. Strikhanov H. Str\"obele T. \v{S}u\v{s}a A. Taranenko A. Tefelska D. Tefelski V. Tereshchenko A. Toia R. Tsenov L. Turko T.S. Tveter M. Unger F.F. Valiev D. Veberi\v{c} V.V. Vechernin V. Volkov A. Wickremasinghe K. W\'ojcik O. Wyszy\'nski A. Zaitsev E.D. Zimmerman A. Zviagina R. Zwaska

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Measurements of $K^{*}(892)^0$ resonance production via its $K^{+}\pi^{-}$ decay mode in inelastic $p+p$ collisions at beam momenta 40 and 80 GeV/$c$ ($\sqrt{s_{NN}}=8.8$ and 12.3 GeV) are presented. The data were recorded by the NA61/SHINE hadron spectrometer at the CERN Super Proton Synchrotron. The \textit{template} method was used to extract the $K^{*}(892)^0$ signal. Transverse momentum and rapidity spectra were obtained. The mean multiplicities of $K^{*}(892)^0$ mesons were found to be $(35.1 \pm 1.3 \mathrm{(stat)} \pm 3.6 \mathrm{(sys)) \cdot 10^{-3}}$ at 40 GeV/$c$ and $(58.3 \pm 1.9 \mathrm{(stat)} \pm 4.9 \mathrm{(sys)) \cdot 10^{-3}}$ at 80 GeV/$c$. The NA61/SHINE results are compared with the EPOS1.99 and Hadron Resonance Gas models as well as with world data. The transverse mass spectra of $K^{*}(892)^0$ mesons and other particles previously reported by NA61/SHINE were fitted within the Blast-Wave model. The transverse flow velocities are close to 0.1--0.2 of the speed of light and are significantly smaller than the ones determined in heavy nucleus-nucleus interactions at the same beam momenta.

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$K^{*}(892)^0$ production and the time between freeze-outs in $^{40}$Ar+$^{45}$Sc collisions by NA61/SHINE at the CERN SPS
nucl-ex 2026-07 accept novelty 6.0

First K*(892)^0 yields in central 40Ar+45Sc at √sNN=8.8–16.8 GeV give freeze-out time intervals of a few fm/c (lower limits) at the higher energies, similar to Pb+Pb.