The p T -differential production cross sections of prompt D0, Λþ c , and Σ0;þþc ð2455Þ charmed hadrons are measured at midrapidity (jyj < 0.5) in pp collisions at ffiffiffi s p ¼ 13 TeV. This is the first measurement of Σ0;þþ c production in hadronic collisions. Assuming the same production yield for the three Σ0;þ;þþ c isospin states, the baryon-to-meson cross section ratios Σ0;þ;þþ c =D0 and Λþ c =D0 are calculated in the transverse momentum (p T ) intervals 2 < p T < 12 and 1 < p T < 24 GeV=c. Values significantly larger than in eþe−collisions are observed, indicating for the first time that baryon enhancement in hadronic collisions also extends to the Σc. The feed-down contribution to Λþ c production from Σ0;þ;þþ c is also reported and is found to be larger than in eþe− collisions. The data are compared with predictions from event generators and other phenomenological models, providing a sensitive test of the different charm-hadronization mech- anisms implemented in the models.

Measurement of prompt D0, Λ+c , and Σ0; ++ c ð2455Þ production in proton-proton collisions at √s = 13 TeV / 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., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 1092-0145. - 128:1(2022), pp. 1-13. [10.1103/PhysRevLett.128.012001]

Measurement of prompt D0, Λ+c , and Σ0; ++ c ð2455Þ production in proton-proton collisions at √s = 13 TeV

L. Cunqueiro
Membro del Collaboration Group
;
2022

Abstract

The p T -differential production cross sections of prompt D0, Λþ c , and Σ0;þþc ð2455Þ charmed hadrons are measured at midrapidity (jyj < 0.5) in pp collisions at ffiffiffi s p ¼ 13 TeV. This is the first measurement of Σ0;þþ c production in hadronic collisions. Assuming the same production yield for the three Σ0;þ;þþ c isospin states, the baryon-to-meson cross section ratios Σ0;þ;þþ c =D0 and Λþ c =D0 are calculated in the transverse momentum (p T ) intervals 2 < p T < 12 and 1 < p T < 24 GeV=c. Values significantly larger than in eþe−collisions are observed, indicating for the first time that baryon enhancement in hadronic collisions also extends to the Σc. The feed-down contribution to Λþ c production from Σ0;þ;þþ c is also reported and is found to be larger than in eþe− collisions. The data are compared with predictions from event generators and other phenomenological models, providing a sensitive test of the different charm-hadronization mech- anisms implemented in the models.
2022
ALICE experiment; hadron-hadron scattering; charm hadronisation
01 Pubblicazione su rivista::01a Articolo in rivista
Measurement of prompt D0, Λ+c , and Σ0; ++ c ð2455Þ production in proton-proton collisions at √s = 13 TeV / 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., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 1092-0145. - 128:1(2022), pp. 1-13. [10.1103/PhysRevLett.128.012001]
File allegati a questo prodotto
File Dimensione Formato  
Acharya_Measurement-of-prompt_2022.pdf

accesso aperto

Note: Articolo su rivista
Tipologia: Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza: Creative commons
Dimensione 671.91 kB
Formato Adobe PDF
671.91 kB Adobe PDF

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/11573/1655185
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 58
  • ???jsp.display-item.citation.isi??? 56
social impact