Σ+ production in pp collisions at √s=13 TeV
  • Abualrob, I. J.
  • Acharya, S.
  • Rinella, G. Aglieri
  • Aglietta, L.
  • Agnello, M.
  • 외 1,029명
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초록

The measurement of Sigma(+) production in pp collisions at root s = 13 TeV is presented. The measurement is performed at midrapidity in both minimum-bias and high-multiplicity pp collisions at root s = 13 TeV. The Sigma(+) is reconstructed via its weak-decay topology in the decay channel Sigma(+) -> p + pi(0) with pi(0) -> gamma + gamma. In a novel approach, the neutral pion is reconstructed by combining photons that convert in the detector material with photons measured in the calorimeters. The transverse-momentum (p(T)) distributions of the Sigma(+) and its rapidity densities dN/dy in both event classes are reported. The p(T) spectrum in minimum-bias collisions is compared to QCD-inspired event generators. The ratio of Sigma(+) to previously measured Lambda baryons is in good agreement with calculations from the Statistical Hadronization Model. The high efficiency and purity of the novel reconstruction method for Sigma(+) presented here will enable future studies of the interaction of Sigma(+) with protons in the context of femtoscopic measurements, which could be crucial for understanding the equation of state of neutron stars.

키워드

MULTIPLICITY DEPENDENCECHARGED-PARTICLESHADRON-PRODUCTIONSTRANGEQCD
제목
Σ+ production in pp collisions at √s=13 TeV
저자
Abualrob, I. J.Acharya, S.Rinella, G. AglieriAglietta, L.Agnello, M.Agrawal, N.Ahammed, Z.Ahmad, S.Ahuja, I.Akbar, Z.Akindinov, A.Akishina, V.Al-Turany, M.Aleksandrov, D.Alessandro, B.Alfanda, H. M.Alfaro Molina, R.Ali, B.Alici, A.Alkin, A.Alme, J.Alocco, G.Alt, T.Altamura, A. R.Altsybeev, I.Andrei, C.Andreou, N.Andronic, A.Andronov, E.Anguelov, V.Antinori, F.Antonioli, P.Apadula, N.Appelshaeuser, H.Arcelli, S.Arnaldi, R.Arneiro, J. G. M. C. A.Arsene, I. C.Arslandok, M.Augustinus, A.Averbeck, R.Azmi, M. D.Baba, H.Babu, A. R. J.Badala, A.Bae, J.Baek, Y. W.Bai, X.Bailhache, R.Bailung, Y.Bala, R.Baldisseri, A.Balis, B.Bangalia, S.Banoo, Z.Barbasova, V.Barile, F.Barioglio, L.Barlou, M.Barman, B.Barnafoldi, G. G.Barnby, L. S.Barreau, E.Barret, V.Barreto, L.Barth, K.Bartsch, E.Bastid, N.Batigne, G.Battistini, D.Batyunya, B.Bauri, D.Bazo Alba, J. L.Bearden, I. G.Becht, P.Behera, D.Behera, S.Belikov, I.Bella, V. D.Bellini, F.Bellwied, R.Beltran, L. G. E.Beltran, Y. A. 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DOI
10.1140/epjc/s10052-025-15095-9
발행일
2026-02-02
유형
Article
저널명
European Physical Journal C
86
2