Evidence for CP Violation in B[superscript +] → p[bar over p]K[superscript +] Decays
Three-body B[superscript +] → p[bar over p]K[superscript +] and B[superscript +] → p[bar over p]π[supersscript +] decays are studied using a data sample corresponding to an integrated luminosity of 3.0fb[superscript -1] collected by the LHCb experiment in proton-proton collisions at center-of-mass e...
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| Format: | Article |
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American Physical Society (APS)
2018
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| Online Access: | http://hdl.handle.net/1721.1/116287 https://orcid.org/0000-0002-4670-1334 https://orcid.org/0000-0001-5534-1732 https://orcid.org/0000-0001-8285-3346 |
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| author | Counts, Ian Thomas Hunt Ilten, Philip J Williams, Michael |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Counts, Ian Thomas Hunt Ilten, Philip J Williams, Michael |
| author_sort | Counts, Ian Thomas Hunt |
| collection | MIT |
| description | Three-body B[superscript +] → p[bar over p]K[superscript +] and B[superscript +] → p[bar over p]π[supersscript +] decays are studied using a data sample corresponding to an integrated luminosity of 3.0fb[superscript -1] collected by the LHCb experiment in proton-proton collisions at center-of-mass energies of 7 and 8 TeV. Evidence of CP violation in the B[superscript +] → p[bar over p]K[superscript +] decay is found in regions of the phase space, representing the first measurement of this kind for a final state containing baryons. Measurements of the forward-backward asymmetry of the light meson in the p[bar over p] rest frame yield A[subscript FB](p[bar over p]K[superscript +],m[subscript p[bar over p]] < 2.85GeV/c[superscript 2]) = 0.495±0.012(stat)±0.007(syst) and AFB(p[bar over p]π[superscript +],m[subscript p[bar orver p]] < 2.85GeV/c[superscript 2]) = -0.409±0.033(stat)±0.006(syst). In addition, the branching fraction of the decay B[superscript +] → [bar over Λ] (1520)p is measured to be B(B[superscript +] → [bar over Λ](1520)p)=(3.15±0.48(stat)±0.07(syst)±0.26(BF))×10[superscript -7], where BF denotes the uncertainty on secondary branching fractions. |
| first_indexed | 2024-09-23T15:44:41Z |
| format | Article |
| id | mit-1721.1/116287 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T15:44:41Z |
| publishDate | 2018 |
| publisher | American Physical Society (APS) |
| record_format | dspace |
| spelling | mit-1721.1/1162872022-09-29T15:55:31Z Evidence for CP Violation in B[superscript +] → p[bar over p]K[superscript +] Decays Counts, Ian Thomas Hunt Ilten, Philip J Williams, Michael Massachusetts Institute of Technology. Department of Physics Counts, Ian Thomas Hunt Ilten, Philip J Williams, Michael Three-body B[superscript +] → p[bar over p]K[superscript +] and B[superscript +] → p[bar over p]π[supersscript +] decays are studied using a data sample corresponding to an integrated luminosity of 3.0fb[superscript -1] collected by the LHCb experiment in proton-proton collisions at center-of-mass energies of 7 and 8 TeV. Evidence of CP violation in the B[superscript +] → p[bar over p]K[superscript +] decay is found in regions of the phase space, representing the first measurement of this kind for a final state containing baryons. Measurements of the forward-backward asymmetry of the light meson in the p[bar over p] rest frame yield A[subscript FB](p[bar over p]K[superscript +],m[subscript p[bar over p]] < 2.85GeV/c[superscript 2]) = 0.495±0.012(stat)±0.007(syst) and AFB(p[bar over p]π[superscript +],m[subscript p[bar orver p]] < 2.85GeV/c[superscript 2]) = -0.409±0.033(stat)±0.006(syst). In addition, the branching fraction of the decay B[superscript +] → [bar over Λ] (1520)p is measured to be B(B[superscript +] → [bar over Λ](1520)p)=(3.15±0.48(stat)±0.07(syst)±0.26(BF))×10[superscript -7], where BF denotes the uncertainty on secondary branching fractions. National Science Foundation (U.S.) 2018-06-13T17:06:05Z 2018-06-13T17:06:05Z 2014-09 2014-07 2018-05-11T18:10:25Z Article http://purl.org/eprint/type/JournalArticle 0031-9007 1079-7114 http://hdl.handle.net/1721.1/116287 Aaij, R., et al. “Evidence for C P Violation in B[superscript +] → p[bar over p]K[superscript +] Decays.” Physical Review Letters, vol. 113, no. 14, Sept. 2014. © 2014 CERN, for the LHCb Collaboration. https://orcid.org/0000-0002-4670-1334 https://orcid.org/0000-0001-5534-1732 https://orcid.org/0000-0001-8285-3346 http://dx.doi.org/10.1103/PHYSREVLETT.113.141801 Physical Review Letters Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society (APS) American Physical Society |
| spellingShingle | Counts, Ian Thomas Hunt Ilten, Philip J Williams, Michael Evidence for CP Violation in B[superscript +] → p[bar over p]K[superscript +] Decays |
| title | Evidence for CP Violation in B[superscript +] → p[bar over p]K[superscript +] Decays |
| title_full | Evidence for CP Violation in B[superscript +] → p[bar over p]K[superscript +] Decays |
| title_fullStr | Evidence for CP Violation in B[superscript +] → p[bar over p]K[superscript +] Decays |
| title_full_unstemmed | Evidence for CP Violation in B[superscript +] → p[bar over p]K[superscript +] Decays |
| title_short | Evidence for CP Violation in B[superscript +] → p[bar over p]K[superscript +] Decays |
| title_sort | evidence for cp violation in b superscript p bar over p k superscript decays |
| url | http://hdl.handle.net/1721.1/116287 https://orcid.org/0000-0002-4670-1334 https://orcid.org/0000-0001-5534-1732 https://orcid.org/0000-0001-8285-3346 |
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