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<12 and 1<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.

Measurement of Prompt D0, Λc+, and Σc0, ++ (2455) Production in Proton-Proton Collisions at √s = 13 TeV / Acharya, S., Adamova, D., Adler, A., Adolfsson, J., Aglieri Rinella, G., Agnello, M., Agrawal, N., Ahammed, Z., Ahmad, S., Ahn, S., Ahuja, I., Akbar, Z., Akindinov, A., Al-Turany, M., Alam, S., Aleksandrov, D., Alessandro, B., Alfanda, H., Alfaro Molina, R., Ali, B., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 128:1(2022), p. 012001.012001. [10.1103/PhysRevLett.128.012001]

Measurement of Prompt D0, Λc+, and Σc0, ++ (2455) Production in Proton-Proton Collisions at √s = 13 TeV

Bruno G.;Colella D.;Fiorenza G.;
2022

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<12 and 1<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.
2022
Measurement of Prompt D0, Λc+, and Σc0, ++ (2455) Production in Proton-Proton Collisions at √s = 13 TeV / Acharya, S., Adamova, D., Adler, A., Adolfsson, J., Aglieri Rinella, G., Agnello, M., Agrawal, N., Ahammed, Z., Ahmad, S., Ahn, S., Ahuja, I., Akbar, Z., Akindinov, A., Al-Turany, M., Alam, S., Aleksandrov, D., Alessandro, B., Alfanda, H., Alfaro Molina, R., Ali, B., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 128:1(2022), p. 012001.012001. [10.1103/PhysRevLett.128.012001]
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/236220
Citazioni
  • Scopus 58
  • ???jsp.display-item.citation.isi??? 56
social impact