Measurement of CP violation in $B_s^0 \to \phi \phi$ decays
A measurement of the decay time dependent $CP$-violating asymmetry in $B_s^0 \to \phi\phi$ decays is presented, along with measurements of the $T$-odd triple-product asymmetries. In this decay channel, the $CP$-violating weak phase arises from the interference between $B_s^0$-$\overline{B}_s^0$ mixi...
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| creator | Aaij, R. Amhis, Y. Barsuk, S. Borsato, M. Callot, O. Kochebina, O. Lefrançois, J. Machefert, F. Martin Sanchez, A. Nicol, M. Robbe, P. Schune, M.-H. Teklishyn, M. Vallier, A. Viaud, B. Ajaltouni, Ziad Zj Baalouch, M. Cogneras, E. Deschamps, O. El Rifai, I. Grabalosa Gándara, M. Henrard, Pierre Hoballah, M. Lefèvre, R. Maratas, J. Monteil, S. Niess, V. Perret, Pascal Roa Romero, Diego Alejandro Beaucourt, L. Decamp, D. Déléage, N. Ghez, Ph Lees, J.-P. Marchand, J.F. Minard, M.-N. Pietrzyk, B. Qian, W. t'Jampens, S. Tisserand, V. Tournefier, E. Akar, S. Aslanides, E. Cogan, J. Kanso, W. Legac, R. Leroy, O. Mancinelli, G. Mordà, A. Perrin-Terrin, M. Serrano, J. Tsaregorodtsev, A. |
| description | A measurement of the decay time dependent $CP$-violating asymmetry in $B_s^0 \to \phi\phi$ decays is presented, along with measurements of the $T$-odd triple-product asymmetries. In this decay channel, the $CP$-violating weak phase arises from the interference between $B_s^0$-$\overline{B}_s^0$ mixing and the loop-induced decay amplitude. Using a sample of proton-proton collision data corresponding to an integrated luminosity of $3.0\, fb^{-1}$ collected with the LHCb detector, a signal yield of approximately 4000 $B_s^0 \to \phi\phi$ decays is obtained. The $CP$-violating phase is measured to be ${\phi_s =-0.17\pm0.15\mathrm{\,(stat)}\pm0.03\mathrm{\,(syst)}}$ rad. The triple-product asymmetries are measured to be ${A_U=-0.003\pm0.017\mathrm{\,(stat)}\pm0.006\mathrm{\,(syst)}}$ and ${A_V=-0.017\pm0.017\mathrm{\,(stat)}\pm0.006\mathrm{\,(syst)}}$. Results are consistent with the hypothesis of $CP$ conservation. |
| doi_str_mv | 10.1103/PhysRevD.90.052011 |
| format | Article |
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D</title><description>A measurement of the decay time dependent $CP$-violating asymmetry in $B_s^0 \to \phi\phi$ decays is presented, along with measurements of the $T$-odd triple-product asymmetries. In this decay channel, the $CP$-violating weak phase arises from the interference between $B_s^0$-$\overline{B}_s^0$ mixing and the loop-induced decay amplitude. Using a sample of proton-proton collision data corresponding to an integrated luminosity of $3.0\, fb^{-1}$ collected with the LHCb detector, a signal yield of approximately 4000 $B_s^0 \to \phi\phi$ decays is obtained. The $CP$-violating phase is measured to be ${\phi_s =-0.17\pm0.15\mathrm{\,(stat)}\pm0.03\mathrm{\,(syst)}}$ rad. The triple-product asymmetries are measured to be ${A_U=-0.003\pm0.017\mathrm{\,(stat)}\pm0.006\mathrm{\,(syst)}}$ and ${A_V=-0.017\pm0.017\mathrm{\,(stat)}\pm0.006\mathrm{\,(syst)}}$. 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| fulltext | fulltext |
| identifier | ISSN: 2470-0010 |
| ispartof | Physical review. D, 2014-08, Vol.90 |
| issn | 2470-0010 2470-0029 |
| language | eng |
| recordid | cdi_hal_primary_oai_HAL_in2p3_01022651v1 |
| source | American Physical Society Journals |
| subjects | High Energy Physics - Experiment Physics |
| title | Measurement of CP violation in $B_s^0 \to \phi \phi$ decays |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-02-10T12%3A17%3A44IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-hal&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Measurement%20of%20CP%20violation%20in%20$B_s%5E0%20%5Cto%20%5Cphi%20%5Cphi$%20decays&rft.jtitle=Physical%20review.%20D&rft.au=Aaij,%20R.&rft.date=2014-08-07&rft.volume=90&rft.issn=2470-0010&rft.eissn=2470-0029&rft_id=info:doi/10.1103/PhysRevD.90.052011&rft_dat=%3Chal%3Eoai_HAL_in2p3_01022651v1%3C/hal%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_id=info:pmid/&rfr_iscdi=true |