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Measurement of Prompt D<sup>0</sup>, Λ<inf>c</inf>+, and Σ<inf>c</inf><sup>0</sup>, <sup>++</sup> (2455) Production in Proton-Proton Collisions at √s = 13 TeV
Journal
Physical Review Letters
ISSN
00319007
Date Issued
2022-01-07
Author(s)
Acharya, S.
Adamová, D.
Adler, A.
Adolfsson, J.
Aglieri Rinella, G.
Agnello, M.
Agrawal, N.
Ahammed, Z.
Ahmad, S.
Ahn, S. U.
Ahuja, I.
Akbar, Z.
Akindinov, A.
Al-Turany, M.
Alam, S. N.
Aleksandrov, D.
Alessandro, B.
Alfanda, H. M.
Alfaro Molina, R.
Ali, B.
Ali, Y.
Alici, A.
Alizadehvandchali, N.
Alkin, A.
Alme, J.
Alt, T.
Altenkamper, L.
Altsybeev, I.
Anaam, M. N.
Andrei, C.
Andreou, D.
Andronic, A.
Angeletti, M.
Anguelov, V.
Antinori, F.
Antonioli, P.
Anuj, C.
Apadula, N.
Aphecetche, L.
Appelshäuser, H.
Arcelli, S.
Arnaldi, R.
Arsene, I. C.
Arslandok, M.
Augustinus, A.
Averbeck, R.
Aziz, S.
Azmi, M. D.
Badalà, A.
Baek, Y. W.
Bai, X.
Bailhache, R.
Bailung, Y.
Bala, R.
Balbino, A.
Baldisseri, A.
Balis, B.
Ball, M.
Banerjee, D.
Barbera, R.
Barioglio, L.
Barlou, M.
Barnaföldi, G. G.
Barnby, L. S.
Barret, V.
Bartels, C.
Barth, K.
Bartsch, E.
Baruffaldi, F.
Bastid, N.
Basu, S.
Batigne, G.
Batyunya, B.
Bauri, D.
Bazo Alba, J. L.
Bearden, I. G.
Beattie, C.
Belikov, I.
Bell Hechavarria, A. D.C.
Bellini, F.
Bellwied, R.
Belokurova, S.
Belyaev, V.
Bencedi, G.
Beole, S.
Bercuci, A.
Berdnikov, Y.
Berdnikova, A.
Berenyi, D.
Bergmann, L.
Besoiu, M. G.
Betev, L.
Bhaduri, P. P.
Bhasin, A.
Bhat, I. R.
Bhat, M. A.
Bhattacharjee, B.
Bhattacharya, P.
Bianchi, L.
Bianchi, N.
Abstract
The pT-differential production cross sections of prompt D0, Λc+, and Σc0,++(2455) charmed hadrons are measured at midrapidity (|y|<0.5) in pp collisions at s=13 TeV. This is the first measurement of Σc0,++ production in hadronic collisions. Assuming the same production yield for the three Σc0,+,++ isospin states, the baryon-to-meson cross section ratios Σc0,+,++/D0 and Λc+/D0 are calculated in the transverse momentum (pT) intervals 2<pT<12 and 1<pT<24 GeV/c. Values significantly larger than in e+e- collisions are observed, indicating for the first time that baryon enhancement in hadronic collisions also extends to the Σc. The feed-down contribution to Λc+ production from Σc0,+,++ is also reported and is found to be larger than in e+e- collisions. The data are compared with predictions from event generators and other phenomenological models, providing a sensitive test of the different charm-hadronization mechanisms implemented in the models.
Volume
128
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