Measurement of transverse Λ and (Formula Presented) hyperon polarization in pPb collisions at (Formula Presented) TeV

LHCb Collaboration

doi:10.1103/rc6r-zt9q

Measurement of transverse Λ and (Formula Presented) hyperon polarization in pPb collisions at (Formula Presented) TeV

LHCb Collaboration

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

2 Scopus citations

Abstract

The transverse polarization of Λ and (Formula Presented) hyperons is measured in pPb collisions collected by the LHCb experiment at a nucleon-nucleon center-of-mass energy of 5.02 TeV. The polarization is averaged over hyperon transverse momentum in the range 0.15 < p_T < 6.00 GeV=c, and Feynman-x in the ranges 0.005 < x_F < 0.040 (forward region) and −0.10 < x_F < −0.01 (backward region) defined relative to the proton beam direction. The transverse polarization is found to be compatible with zero for both Λ and Λ̄ hyperons. The results are also measured as a function of p_T and x_F with no significant dependence on these variables observed. The results are compared with previous experimental measurements at different center-of-mass energies and collision environments.

Original language	English
Article number	112022
Pages (from-to)	1-15
Number of pages	15
Journal	Physical Review D
Volume	112
DOIs	https://doi.org/10.1103/rc6r-zt9q
State	Published - Dec 2025

Access to Document

10.1103/rc6r-zt9q

Cite this

@article{fefe2b1c4ff047159a0a6d6fa6e5e3d9,

title = "Measurement of transverse Λ and (Formula Presented) hyperon polarization in pPb collisions at (Formula Presented) TeV",

abstract = "The transverse polarization of Λ and (Formula Presented) hyperons is measured in pPb collisions collected by the LHCb experiment at a nucleon-nucleon center-of-mass energy of 5.02 TeV. The polarization is averaged over hyperon transverse momentum in the range 0.15 < pT < 6.00 GeV=c, and Feynman-x in the ranges 0.005 < xF < 0.040 (forward region) and −0.10 < xF < −0.01 (backward region) defined relative to the proton beam direction. The transverse polarization is found to be compatible with zero for both Λ and {\=Λ} hyperons. The results are also measured as a function of pT and xF with no significant dependence on these variables observed. The results are compared with previous experimental measurements at different center-of-mass energies and collision environments.",

author = "\{LHCb Collaboration\} and R. Aaij and Abdelmotteleb, \{A. S.W.\} and Beteta, \{C. Abellan\} and F. Abudin{\'e}n and T. Ackernley and Adefisoye, \{A. A.\} and B. Adeva and M. Adinolfi and P. Adlarson 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 Z. Aliouche and Cartelle, \{P. Alvarez\} 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 A. Anelli and D. Ao and F. Archilli and Z. Areg and M. Argenton and Cuendis, \{S. Arguedas\} and A. Artamonov and M. Artuso and E. Aslanides and \{Da Silva\}, \{R. Ata{\'i}de\} and M. Atzeni and B. Audurier and D. Bacher and Perea, \{I. Bachiller\} and S. Bachmann and M. Bachmayer and Back, \{J. J.\} and Rodriguez, \{P. Baladron\} and V. Balagura and Milanes, \{D. A.\} and E. Shmanin",

note = "Publisher Copyright: {\textcopyright} 2025 CERN, for the LHCb Collaboration",

year = "2025",

month = dec,

doi = "10.1103/rc6r-zt9q",

language = "English",

volume = "112",

pages = "1--15",

journal = "Physical Review D",

issn = "2470-0010",

}

TY - JOUR

T1 - Measurement of transverse Λ and (Formula Presented) hyperon polarization in pPb collisions at (Formula Presented) TeV

AU - LHCb Collaboration

AU - Aaij, R.

AU - Abdelmotteleb, A. S.W.

AU - Beteta, C. Abellan

AU - Abudinén, F.

AU - Ackernley, T.

AU - Adefisoye, A. A.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Adlarson, P.

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 - Aliouche, Z.

AU - Cartelle, P. Alvarez

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 - Anelli, A.

AU - Ao, D.

AU - Archilli, F.

AU - Areg, Z.

AU - Argenton, M.

AU - Cuendis, S. Arguedas

AU - Artamonov, A.

AU - Artuso, M.

AU - Aslanides, E.

AU - Da Silva, R. Ataíde

AU - Atzeni, M.

AU - Audurier, B.

AU - Bacher, D.

AU - Perea, I. Bachiller

AU - Bachmann, S.

AU - Bachmayer, M.

AU - Back, J. J.

AU - Rodriguez, P. Baladron

AU - Balagura, V.

AU - Milanes, D. A.

AU - Shmanin, E.

PY - 2025/12

Y1 - 2025/12

N2 - The transverse polarization of Λ and (Formula Presented) hyperons is measured in pPb collisions collected by the LHCb experiment at a nucleon-nucleon center-of-mass energy of 5.02 TeV. The polarization is averaged over hyperon transverse momentum in the range 0.15 < pT < 6.00 GeV=c, and Feynman-x in the ranges 0.005 < xF < 0.040 (forward region) and −0.10 < xF < −0.01 (backward region) defined relative to the proton beam direction. The transverse polarization is found to be compatible with zero for both Λ and Λ̄ hyperons. The results are also measured as a function of pT and xF with no significant dependence on these variables observed. The results are compared with previous experimental measurements at different center-of-mass energies and collision environments.

AB - The transverse polarization of Λ and (Formula Presented) hyperons is measured in pPb collisions collected by the LHCb experiment at a nucleon-nucleon center-of-mass energy of 5.02 TeV. The polarization is averaged over hyperon transverse momentum in the range 0.15 < pT < 6.00 GeV=c, and Feynman-x in the ranges 0.005 < xF < 0.040 (forward region) and −0.10 < xF < −0.01 (backward region) defined relative to the proton beam direction. The transverse polarization is found to be compatible with zero for both Λ and Λ̄ hyperons. The results are also measured as a function of pT and xF with no significant dependence on these variables observed. The results are compared with previous experimental measurements at different center-of-mass energies and collision environments.

UR - https://www.scopus.com/pages/publications/105036977266

U2 - 10.1103/rc6r-zt9q

DO - 10.1103/rc6r-zt9q

M3 - Article

AN - SCOPUS:105036977266

SN - 2470-0010

VL - 112

SP - 1

EP - 15

JO - Physical Review D

JF - Physical Review D

M1 - 112022

ER -

Measurement of transverse Λ and (Formula Presented) hyperon polarization in pPb collisions at (Formula Presented) TeV

Abstract

Access to Document

Other files and links

Fingerprint

Cite this