Search for CP violation in Ξb− →pK−K− decays
A search for $CP$ violation in charmless three-body $\Xi_b^- \to p K^- K^-$ decays is performed using $pp$ collision data recorded with the LHCb detector, corresponding to integrated luminosities of $1\,\text{fb}^{-1}$ at a centre-of-mass energy $\sqrt{s} = 7\,\text{TeV}$, $2\,\text{fb}^{-1}$ at...
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| Format: | Article |
| Language: | English |
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American Physical Society (APS)
2022
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| Online Access: | https://hdl.handle.net/1721.1/142444 |
| _version_ | 1811071487188140032 |
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| author | Williams, Michael |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Williams, Michael |
| author_sort | Williams, Michael |
| collection | MIT |
| description | A search for $CP$ violation in charmless three-body $\Xi_b^- \to p K^- K^-$
decays is performed using $pp$ collision data recorded with the LHCb detector,
corresponding to integrated luminosities of $1\,\text{fb}^{-1}$ at a
centre-of-mass energy $\sqrt{s} = 7\,\text{TeV}$, $2\,\text{fb}^{-1}$ at
$\sqrt{s} = 8\,\text{TeV}$ and $2\,\text{fb}^{-1}$ at $\sqrt{s} =
13\,\text{TeV}$. A good description of the phase-space distribution is obtained
with an amplitude model containing contributions from $\Sigma(1385)$,
$\Lambda(1405)$, $\Lambda(1520)$, $\Lambda(1670)$, $\Sigma(1775)$ and
$\Sigma(1915)$ resonances. The model allows for $CP$-violation effects, which
are found to be consistent with zero. The branching fractions of $\Xi_b^- \to
\Sigma(1385) K^-$, $\Xi_b^- \to \Lambda(1405) K^-$, $\Xi_b^- \to \Lambda(1520)
K^-$, $\Xi_b^- \to \Lambda(1670) K^-$, $\Xi_b^- \to \Sigma(1775) K^-$ and
$\Xi_b^- \to \Sigma(1915) K^-$ decays are also reported. In addition, an upper
limit is placed on the product of ratios of $\Omega_b^-$ and $\Xi_b^-$
fragmentation fractions and the $\Omega_b^- \to p K^- K^-$ and $\Xi_b^- \to p
K^- K^-$ branching fractions. |
| first_indexed | 2024-09-23T08:51:54Z |
| format | Article |
| id | mit-1721.1/142444 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T08:51:54Z |
| publishDate | 2022 |
| publisher | American Physical Society (APS) |
| record_format | dspace |
| spelling | mit-1721.1/1424442023-12-07T18:16:35Z Search for CP violation in Ξb− →pK−K− decays Williams, Michael Massachusetts Institute of Technology. Department of Physics A search for $CP$ violation in charmless three-body $\Xi_b^- \to p K^- K^-$ decays is performed using $pp$ collision data recorded with the LHCb detector, corresponding to integrated luminosities of $1\,\text{fb}^{-1}$ at a centre-of-mass energy $\sqrt{s} = 7\,\text{TeV}$, $2\,\text{fb}^{-1}$ at $\sqrt{s} = 8\,\text{TeV}$ and $2\,\text{fb}^{-1}$ at $\sqrt{s} = 13\,\text{TeV}$. A good description of the phase-space distribution is obtained with an amplitude model containing contributions from $\Sigma(1385)$, $\Lambda(1405)$, $\Lambda(1520)$, $\Lambda(1670)$, $\Sigma(1775)$ and $\Sigma(1915)$ resonances. The model allows for $CP$-violation effects, which are found to be consistent with zero. The branching fractions of $\Xi_b^- \to \Sigma(1385) K^-$, $\Xi_b^- \to \Lambda(1405) K^-$, $\Xi_b^- \to \Lambda(1520) K^-$, $\Xi_b^- \to \Lambda(1670) K^-$, $\Xi_b^- \to \Sigma(1775) K^-$ and $\Xi_b^- \to \Sigma(1915) K^-$ decays are also reported. In addition, an upper limit is placed on the product of ratios of $\Omega_b^-$ and $\Xi_b^-$ fragmentation fractions and the $\Omega_b^- \to p K^- K^-$ and $\Xi_b^- \to p K^- K^-$ branching fractions. 2022-05-10T14:54:13Z 2022-05-10T14:54:13Z 2021 2022-05-10T14:51:11Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/142444 Williams, Michael. 2021. "Search for CP violation in Ξb− →pK−K− decays." Physical Review D, 104 (5). en 10.1103/PHYSREVD.104.052010 Physical Review D Creative Commons Attribution 4.0 International License https://creativecommons.org/licenses/by/4.0 application/pdf American Physical Society (APS) APS |
| spellingShingle | Williams, Michael Search for CP violation in Ξb− →pK−K− decays |
| title | Search for CP violation in Ξb− →pK−K− decays |
| title_full | Search for CP violation in Ξb− →pK−K− decays |
| title_fullStr | Search for CP violation in Ξb− →pK−K− decays |
| title_full_unstemmed | Search for CP violation in Ξb− →pK−K− decays |
| title_short | Search for CP violation in Ξb− →pK−K− decays |
| title_sort | search for cp violation in ξb pk k decays |
| url | https://hdl.handle.net/1721.1/142444 |
| work_keys_str_mv | AT williamsmichael searchforcpviolationinxbpkkdecays |