Observation of strangeness enhancement with charmed mesons in high-multiplicity pPb collisions at √sNN =8.16 TeV

LHCb Collaboration

doi:10.1103/PhysRevD.110.L031105

Observation of strangeness enhancement with charmed mesons in high-multiplicity pPb collisions at √sNN =8.16 TeV

LHCb Collaboration

Physics and Astronomy

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

34 Downloads (Pure)

Abstract

The production of prompt D_s⁺ and D⁺ mesons is measured by the LHCb experiment in proton-lead (pPb) collisions in both the forward (1.5<y^∗<4.0) and backward (-5.0<y^∗<-2.5) rapidity regions at a nucleon-nucleon center-of-mass energy of √sNN=8.16 TeV. The nuclear modification factors of both Ds+ and D+ mesons are determined as a function of transverse momentum, pT, and rapidity. In addition, the D_s⁺to D⁺cross section ratio is measured as a function of the primary charged particle multiplicity in the event. An enhanced D_s⁺ to D⁺ production in high-multiplicity events is observed for the whole measured pT range, in particular at low pT and backward rapidity, where the significance exceeds six standard deviations. This constitutes the first observation of strangeness enhancement in charm quark hadronization in high-multiplicity pPb collisions. The results are also qualitatively consistent with the presence of quark coalescence as an additional charm quark hadronization mechanism in high-multiplicity proton-lead collisions.

Original language	English
Article number	L031105
Journal	Physical Review D
Volume	110
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevD.110.L031105
Publication status	Published - 22 Aug 2024

Bibliographical note

Publisher Copyright:
© 2024 CERN, for the LHCb Collaboration. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1103/PhysRevD.110.L031105Licence: Creative Commons: Attribution (CC BY)

LHCbcollab2024ObservationFinal published version, 1.13 MBLicence: Creative Commons: Attribution (CC BY)

Cite this

@article{17c25885c3d140c8b82b202d73cf7877,

title = "Observation of strangeness enhancement with charmed mesons in high-multiplicity pPb collisions at √sNN =8.16 TeV",

abstract = "The production of prompt Ds+ and D+ mesons is measured by the LHCb experiment in proton-lead (pPb) collisions in both the forward (1.5∗<4.0) and backward (-5.0∗<-2.5) rapidity regions at a nucleon-nucleon center-of-mass energy of √sNN=8.16 TeV. The nuclear modification factors of both Ds+ and D+ mesons are determined as a function of transverse momentum, pT, and rapidity. In addition, the Ds+ to D+ cross section ratio is measured as a function of the primary charged particle multiplicity in the event. An enhanced Ds+ to D+ production in high-multiplicity events is observed for the whole measured pT range, in particular at low pT and backward rapidity, where the significance exceeds six standard deviations. This constitutes the first observation of strangeness enhancement in charm quark hadronization in high-multiplicity pPb collisions. The results are also qualitatively consistent with the presence of quark coalescence as an additional charm quark hadronization mechanism in high-multiplicity proton-lead collisions.",

author = "{LHCb Collaboration} and R. Aaij and Abdelmotteleb, {A. S.W.} and {Abellan Beteta}, C. and F. Abudin{\'e}n and T. Ackernley and B. Adeva and M. Adinolfi and P. Adlarson and H. Afsharnia and C. Agapopoulou and Aidala, {C. A.} and Z. Ajaltouni and S. Akar and K. Akiba and P. Albicocco and J. Albrecht and F. Alessio and M. Alexander and {Alfonso Albero}, A. and Z. Aliouche and {Alvarez Cartelle}, P. and R. Amalric and S. Amato and Amey, {J. L.} and Y. Amhis and L. An and L. Anderlini and M. Andersson and A. Andreianov and P. Andreola and M. Andreotti and D. Andreou and D. Ao and F. Archilli and {Arguedas Cuendis}, S. and A. Artamonov and M. Artuso and V. Duk and P. Ilten and D. Johnson and C. Lazzeroni and Madurai, {M. M.} and D. Popov and N. Sahoo and A. Sergi and Slater, {M. W.} and Swallow, {P. N.} and Thompson, {D. J.D.} and Volle, {F. C.} and Watson, {N. K.}",

note = "Publisher Copyright: {\textcopyright} 2024 CERN, for the LHCb Collaboration. Published by the American Physical Society under the terms of the {"}https://creativecommons.org/licenses/by/4.0/{"}Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.",

year = "2024",

month = aug,

day = "22",

doi = "10.1103/PhysRevD.110.L031105",

language = "English",

volume = "110",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society (APS)",

number = "3",

}

TY - JOUR

T1 - Observation of strangeness enhancement with charmed mesons in high-multiplicity pPb collisions at √sNN =8.16 TeV

AU - LHCb Collaboration

AU - Aaij, R.

AU - Abdelmotteleb, A. S.W.

AU - Abellan Beteta, C.

AU - Abudinén, F.

AU - Ackernley, T.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Adlarson, P.

AU - Afsharnia, H.

AU - Agapopoulou, C.

AU - Aidala, C. A.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Akiba, K.

AU - Albicocco, P.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Alfonso Albero, A.

AU - Aliouche, Z.

AU - Alvarez Cartelle, P.

AU - Amalric, R.

AU - Amato, S.

AU - Amey, J. L.

AU - Amhis, Y.

AU - An, L.

AU - Anderlini, L.

AU - Andersson, M.

AU - Andreianov, A.

AU - Andreola, P.

AU - Andreotti, M.

AU - Andreou, D.

AU - Ao, D.

AU - Archilli, F.

AU - Arguedas Cuendis, S.

AU - Artamonov, A.

AU - Artuso, M.

AU - Duk, V.

AU - Ilten, P.

AU - Johnson, D.

AU - Lazzeroni, C.

AU - Madurai, M. M.

AU - Popov, D.

AU - Sahoo, N.

AU - Sergi, A.

AU - Slater, M. W.

AU - Swallow, P. N.

AU - Thompson, D. J.D.

AU - Volle, F. C.

AU - Watson, N. K.

N1 - Publisher Copyright: © 2024 CERN, for the LHCb Collaboration. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.

PY - 2024/8/22

Y1 - 2024/8/22

N2 - The production of prompt Ds+ and D+ mesons is measured by the LHCb experiment in proton-lead (pPb) collisions in both the forward (1.5∗<4.0) and backward (-5.0∗<-2.5) rapidity regions at a nucleon-nucleon center-of-mass energy of √sNN=8.16 TeV. The nuclear modification factors of both Ds+ and D+ mesons are determined as a function of transverse momentum, pT, and rapidity. In addition, the Ds+ to D+ cross section ratio is measured as a function of the primary charged particle multiplicity in the event. An enhanced Ds+ to D+ production in high-multiplicity events is observed for the whole measured pT range, in particular at low pT and backward rapidity, where the significance exceeds six standard deviations. This constitutes the first observation of strangeness enhancement in charm quark hadronization in high-multiplicity pPb collisions. The results are also qualitatively consistent with the presence of quark coalescence as an additional charm quark hadronization mechanism in high-multiplicity proton-lead collisions.

AB - The production of prompt Ds+ and D+ mesons is measured by the LHCb experiment in proton-lead (pPb) collisions in both the forward (1.5∗<4.0) and backward (-5.0∗<-2.5) rapidity regions at a nucleon-nucleon center-of-mass energy of √sNN=8.16 TeV. The nuclear modification factors of both Ds+ and D+ mesons are determined as a function of transverse momentum, pT, and rapidity. In addition, the Ds+ to D+ cross section ratio is measured as a function of the primary charged particle multiplicity in the event. An enhanced Ds+ to D+ production in high-multiplicity events is observed for the whole measured pT range, in particular at low pT and backward rapidity, where the significance exceeds six standard deviations. This constitutes the first observation of strangeness enhancement in charm quark hadronization in high-multiplicity pPb collisions. The results are also qualitatively consistent with the presence of quark coalescence as an additional charm quark hadronization mechanism in high-multiplicity proton-lead collisions.

UR - http://www.scopus.com/inward/record.url?scp=85202732859&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.110.L031105

DO - 10.1103/PhysRevD.110.L031105

M3 - Article

AN - SCOPUS:85202732859

SN - 2470-0010

VL - 110

JO - Physical Review D

JF - Physical Review D

IS - 3

M1 - L031105

ER -