Measurement of Prompt <i>D</i><SUP>0</SUP>, Λ<i><sub>c</sub></i><SUP>+</SUP>, and Σ<sub><i>c</i></sub><SUP>0,++</SUP> (2455) Production in Proton-Proton Collisions at √<i>s</i>=13 TeV
PHYSICAL REVIEW LETTERS, vol.128, no.1, 2022 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 128 Issue: 1
- Publication Date: 2022
- Doi Number: 10.1103/physrevlett.128.012001
- Journal Name: PHYSICAL REVIEW LETTERS
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Compendex, EMBASE, INSPEC, MEDLINE, zbMATH, DIALNET
- Yıldız Technical University Affiliated: No
Abstract
The p(T)-differential production cross sections of prompt D-0, Lambda(c)+, and Sigma(0,++)(c) (2455) charmed hadrons are measured at midrapidity (vertical bar y vertical bar < 0.5) in pp collisions at root s. = 13 TeV. This is the first measurement of Sigma(0,++)(c) production in hadronic collisions. Assuming the same production yield for the three Sigma(0,++)(c) isospin states, the baryon-to-meson cross section ratios Sigma(0,+,++)(c)/D-0 and Lambda(+)(c)/D-0 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 e(+)e(-) collisions are observed, indicating for the first time that baryon enhancement in hadronic collisions also extends to the Sigma(c). The feed-down contribution to Lambda(+)(c) production from Sigma(0,+,++)(c) 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.