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dc.contributor.authorAaij, R
dc.contributor.authorAbdelmotteleb, ASW
dc.contributor.authorAbellán Beteta, C
dc.contributor.authorAckernley, T
dc.contributor.authorAdeva, B
dc.contributor.authorAdinolfi, M
dc.contributor.authorAfsharnia, H
dc.contributor.authorAidala, CA
dc.contributor.authorAiola, S
dc.contributor.authorAjaltouni, Z
dc.contributor.authorAkar, S
dc.contributor.authorAlbrecht, J
dc.contributor.authorAlessio, F
dc.contributor.authorAlexander, M
dc.contributor.authorAlfonso Albero, A
dc.contributor.authorAliouche, Z
dc.contributor.authorAlkhazov, G
dc.contributor.authorAlvarez Cartelle, P
dc.contributor.authorAmato, S
dc.contributor.authorAmey, JL
dc.contributor.authorAmhis, Y
dc.contributor.authorAn, L
dc.contributor.authorAnderlini, L
dc.contributor.authorAndreianov, A
dc.contributor.authorAndreotti, M
dc.contributor.authorArchilli, F
dc.contributor.authorArtamonov, A
dc.contributor.authorArtuso, M
dc.contributor.authorArzymatov, K
dc.contributor.authorAslanides, E
dc.contributor.authorAtzeni, M
dc.contributor.authorAudurier, B
dc.contributor.authorBachmann, S
dc.contributor.authorBachmayer, M
dc.contributor.authorBack, JJ
dc.contributor.authorBaladron Rodriguez, P
dc.contributor.authorBalagura, V
dc.contributor.authorBaldini, W
dc.contributor.authorBaptista Leite, J
dc.contributor.authorBarlow, RJ
dc.contributor.authorBarsuk, S
dc.contributor.authorBarter, W
dc.contributor.authorBartolini, M
dc.contributor.authorBaryshnikov, F
dc.contributor.authorBasels, JM
dc.contributor.authorBashir, S
dc.contributor.authorBassi, G
dc.contributor.authorBatsukh, B
dc.contributor.authorBattig, A
dc.contributor.authorBay, A
dc.contributor.authorBeck, A
dc.contributor.authorBecker, M
dc.contributor.authorBedeschi, F
dc.contributor.authorBediaga, I
dc.contributor.authorBeiter, A
dc.contributor.authorBelavin, V
dc.contributor.authorBelin, S
dc.contributor.authorBellee, V
dc.contributor.authorBelous, K
dc.contributor.authorBelov, I
dc.contributor.authorBelyaev, I
dc.contributor.authorBencivenni, G
dc.contributor.authorBen-Haim, E
dc.contributor.authorBerezhnoy, A
dc.contributor.authorBernet, R
dc.contributor.authorBerninghoff, D
dc.contributor.authorBernstein, HC
dc.contributor.authorBertella, C
dc.contributor.authorBertolin, A
dc.contributor.authorBetancourt, C
dc.contributor.authorBetti, F
dc.contributor.authorBezshyiko, I
dc.contributor.authorBhasin, S
dc.contributor.authorBhom, J
dc.contributor.authorBian, L
dc.contributor.authorBieker, MS
dc.contributor.authorBifani, S
dc.contributor.authorBilloir, P
dc.contributor.authorBirch, M
dc.contributor.authorBishop, FCR
dc.contributor.authorBitadze, A
dc.contributor.authorBizzeti, A
dc.contributor.authorBjørn, M
dc.contributor.authorBlago, MP
dc.contributor.authorBlake, T
dc.contributor.authorBlanc, F
dc.contributor.authorBlusk, S
dc.contributor.authorBobulska, D
dc.contributor.authorBoelhauve, JA
dc.contributor.authorBoente Garcia, O
dc.contributor.authorBoettcher, T
dc.contributor.authorBoldyrev, A
dc.contributor.authorBondar, A
dc.contributor.authorBondar, N
dc.contributor.authorBorghi, S
dc.contributor.authorBorisyak, M
dc.contributor.authorBorsato, M
dc.contributor.authorBorsuk, JT
dc.contributor.authorBouchiba, SA
dc.contributor.authorBowcock, TJV
dc.date.accessioned2022-01-28T16:45:28Z
dc.date.available2022-01-28T16:45:28Z
dc.date.issued2021
dc.date.submitted2021-07-21
dc.identifier.issn1029-8479
dc.identifier.otherjhep10(2021)060
dc.identifier.other16854
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/333297
dc.description.abstractThis article presents differential measurements of the asymmetry between $\Lambda_b^0$ and $\overline{\Lambda}_b^0$ baryon production rates in proton-proton collisions at centre-of-mass energies of $\sqrt{s}=7$ and $8\,\textrm{TeV}$ collected with the LHCb experiment, corresponding to an integrated luminosity of $3\,\textrm{fb}^{-1}$. The $\Lambda_b^0$ baryons are reconstructed through the inclusive semileptonic decay $\Lambda_b^0\rightarrow\Lambda_c^+\mu^-\overline{\nu}_{\mu}X$. The production asymmetry is measured both in intervals of rapidity in the range $2.15<y<4.10$ and transverse momentum in $2<p_T<27\,\textrm{GeV}/c$. The results are found to be incompatible with symmetric production with a significance of 5.8 standard deviations for both $\sqrt{s}=7$ and $8\,\textrm{TeV}$ data, assuming no $C\!P$ violation in the decay. There is evidence for a trend as a function of rapidity with a significance of 4 standard deviations. Comparisons to predictions from hadronisation models in PYTHIA and heavy-quark recombination are provided. This result constitutes the first observation of a particle-antiparticle asymmetry in $b$-hadron production at LHC energies.
dc.languageen
dc.publisherSpringer Berlin Heidelberg
dc.subjectRegular Article - Experimental Physics
dc.subjectHadron-Hadron scattering (experiments)
dc.subjectHeavy quark production
dc.subjectproton-proton scattering
dc.subjectHard scattering
dc.subjectB physics
dc.titleObservation of a Λb0 − Λ¯b0 production asymmetry in proton-proton collisions at √s = 7 and 8 TeV
dc.typeArticle
dc.date.updated2022-01-28T16:45:27Z
prism.issueIdentifier10
prism.publicationNameJournal of High Energy Physics
prism.volume2021
dc.identifier.doi10.17863/CAM.80720
dcterms.dateAccepted2021-09-14
rioxxterms.versionofrecord10.1007/JHEP10(2021)060
rioxxterms.versionVoR
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by/4.0/
dc.contributor.orcidAlvarez Cartelle, Paula [0000-0003-1652-2834]
dc.identifier.eissn1029-8479
dc.identifier.arxiv2107.09593


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