Λ c + production in pp collisions at √s=7 TeV and in p-Pb collisions at √sNN=5.02 TeV

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Λ _c ⁺ production in pp collisions at √s=7 TeV and in p-Pb collisions at √sNN=5.02 TeV. / ALICE Collaboration.

In: Journal of High Energy Physics, Vol. 2018, No. 4, 108, 01.04.2018.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{7925c010e7de48a5b2ebea85e3d8834f,

title = "Λ c + production in pp collisions at √s=7 TeV and in p-Pb collisions at √sNN=5.02 TeV",

abstract = "The pT-differential production cross section of prompt Λc + charmed baryons was measured with the ALICE detector at the Large Hadron Collider (LHC) in pp collisions at s=7 TeV and in p-Pb collisions at sNN=5.02 TeV at midrapidity. The Λc + and Λ¯ c ¯ were reconstructed in the hadronic decay modes Λc + → pK−π+, Λc + → pKS 0 and in the semileptonic channel Λc + → e+νeΛ (and charge conjugates). The measured values of the Λc +/D0 ratio, which is sensitive to the c-quark hadronisation mechanism, and in particular to the production of baryons, are presented and are larger than those measured previously in different colliding systems, centre-of-mass energies, rapidity and pT intervals, where the Λc + production process may differ. The results are compared with the expectations obtained from perturbative Quantum Chromodynamics calculations and Monte Carlo event generators. Neither perturbative QCD calculations nor Monte Carlo models reproduce the data, indicating that the fragmentation of heavy-flavour baryons is not well understood. The first measurement at the LHC of the Λc + nuclear modification factor, RpPb, is also presented. The RpPb is found to be consistent with unity and with that of D mesons within the uncertainties, and consistent with a theoretical calculation that includes cold nuclear matter effects and a calculation that includes charm quark interactions with a deconfined medium.[Figure not available: see fulltext.]",

keywords = "Heavy Ion Experiments, Quark gluon plasma",

author = "{ALICE Collaboration} and S. Acharya and Acosta, {F. T.} and D. Adamov{\'a} and J. Adolfsson and Aggarwal, {M. M.} and D. Aleksandrov and I. Altsybeev and V. Belyaev and Y. Berdnikov and A. Bogdanov and G. Feofilov and S. Fokin and M. Ivanov and V. Ivanov and J. Kim and J. Kim and M. Kim and S. Kim and T. Kim and S. Kiselev and V. Kondratiev and V. Kovalenko and S. Lee and X. Li and X. Li and A. Mamonov and Y. Mao and A. Mar{\'i}n and S. Nikolaev and V. Riabov and V. Samsonov and A. Shabanov and N. Smirnov and J. Song and A. Tikhonov and V. Vechernin and A. Vinogradov and L. Vinogradov and H. Wang and M. Wang and A. Zarochentsev and H. Zhang and X. Zhang and Y. Zhang and C. Zhang and Z. Zhang and Y. Zhou and Z. Zhou and H. Zhu and J. Zhu",

year = "2018",

month = apr,

day = "1",

doi = "10.1007/JHEP04(2018)108",

language = "English",

volume = "2018",

journal = "Journal of High Energy Physics",

issn = "1126-6708",

publisher = "Springer Nature",

number = "4",

}

RIS

TY - JOUR

T1 - Λ c + production in pp collisions at √s=7 TeV and in p-Pb collisions at √sNN=5.02 TeV

AU - ALICE Collaboration

AU - Acharya, S.

AU - Acosta, F. T.

AU - Adamová, D.

AU - Adolfsson, J.

AU - Aggarwal, M. M.

AU - Aleksandrov, D.

AU - Altsybeev, I.

AU - Belyaev, V.

AU - Berdnikov, Y.

AU - Bogdanov, A.

AU - Feofilov, G.

AU - Fokin, S.

AU - Ivanov, M.

AU - Ivanov, V.

AU - Kim, J.

AU - Kim, M.

AU - Kim, S.

AU - Kim, T.

AU - Kiselev, S.

AU - Kondratiev, V.

AU - Kovalenko, V.

AU - Lee, S.

AU - Li, X.

AU - Mamonov, A.

AU - Mao, Y.

AU - Marín, A.

AU - Nikolaev, S.

AU - Riabov, V.

AU - Samsonov, V.

AU - Shabanov, A.

AU - Smirnov, N.

AU - Song, J.

AU - Tikhonov, A.

AU - Vechernin, V.

AU - Vinogradov, A.

AU - Vinogradov, L.

AU - Wang, H.

AU - Wang, M.

AU - Zarochentsev, A.

AU - Zhang, H.

AU - Zhang, X.

AU - Zhang, Y.

AU - Zhang, C.

AU - Zhang, Z.

AU - Zhou, Y.

AU - Zhou, Z.

AU - Zhu, H.

AU - Zhu, J.

PY - 2018/4/1

Y1 - 2018/4/1

N2 - The pT-differential production cross section of prompt Λc + charmed baryons was measured with the ALICE detector at the Large Hadron Collider (LHC) in pp collisions at s=7 TeV and in p-Pb collisions at sNN=5.02 TeV at midrapidity. The Λc + and Λ¯ c ¯ were reconstructed in the hadronic decay modes Λc + → pK−π+, Λc + → pKS 0 and in the semileptonic channel Λc + → e+νeΛ (and charge conjugates). The measured values of the Λc +/D0 ratio, which is sensitive to the c-quark hadronisation mechanism, and in particular to the production of baryons, are presented and are larger than those measured previously in different colliding systems, centre-of-mass energies, rapidity and pT intervals, where the Λc + production process may differ. The results are compared with the expectations obtained from perturbative Quantum Chromodynamics calculations and Monte Carlo event generators. Neither perturbative QCD calculations nor Monte Carlo models reproduce the data, indicating that the fragmentation of heavy-flavour baryons is not well understood. The first measurement at the LHC of the Λc + nuclear modification factor, RpPb, is also presented. The RpPb is found to be consistent with unity and with that of D mesons within the uncertainties, and consistent with a theoretical calculation that includes cold nuclear matter effects and a calculation that includes charm quark interactions with a deconfined medium.[Figure not available: see fulltext.]

AB - The pT-differential production cross section of prompt Λc + charmed baryons was measured with the ALICE detector at the Large Hadron Collider (LHC) in pp collisions at s=7 TeV and in p-Pb collisions at sNN=5.02 TeV at midrapidity. The Λc + and Λ¯ c ¯ were reconstructed in the hadronic decay modes Λc + → pK−π+, Λc + → pKS 0 and in the semileptonic channel Λc + → e+νeΛ (and charge conjugates). The measured values of the Λc +/D0 ratio, which is sensitive to the c-quark hadronisation mechanism, and in particular to the production of baryons, are presented and are larger than those measured previously in different colliding systems, centre-of-mass energies, rapidity and pT intervals, where the Λc + production process may differ. The results are compared with the expectations obtained from perturbative Quantum Chromodynamics calculations and Monte Carlo event generators. Neither perturbative QCD calculations nor Monte Carlo models reproduce the data, indicating that the fragmentation of heavy-flavour baryons is not well understood. The first measurement at the LHC of the Λc + nuclear modification factor, RpPb, is also presented. The RpPb is found to be consistent with unity and with that of D mesons within the uncertainties, and consistent with a theoretical calculation that includes cold nuclear matter effects and a calculation that includes charm quark interactions with a deconfined medium.[Figure not available: see fulltext.]

KW - Heavy Ion Experiments

KW - Quark gluon plasma

UR - http://www.scopus.com/inward/record.url?scp=85048630586&partnerID=8YFLogxK

U2 - 10.1007/JHEP04(2018)108

DO - 10.1007/JHEP04(2018)108

M3 - Article

AN - SCOPUS:85048630586

VL - 2018

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

SN - 1126-6708

IS - 4

M1 - 108

ER -

ID: 35151214