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Measurement of $CP$ violation in $B^0 \!\rightarrow D^+ D^-$ decays

The $C\!P$ violation observables $S$ and $C$ in the decay channel $B^0 \!\rightarrow D^+ D^-$ are determined from a sample of proton-proton collisions at centre-of-mass energies of $7$ and $8$ TeV, collected by the LHCb experiment and corresponding to an integrated luminosity of $3~ {\text {fb}}^{-1...

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Johnson, Daniel, Jones, Christopher, Joram, Christian, Jost, Beat, Jurik, Nathan, Kandybei, Sergii, Kanso, Walaa, Karacson, Matthias, Kariuki, James Mwangi, Karodia, Sarah, Kecke, Matthieu, Kelsey, Matthew, Kenyon, Ian, Kenzie, Matthew, Ketel, Tjeerd, Khairullin, Egor, Khanji, Basem, Khurewathanakul, Chitsanu, Kirn, Thomas, Klaver, Suzanne, Klimaszewski, Konrad, Koliiev, Serhii, Kolpin, Michael, Komarov, Ilya, Koopman, Rose, Koppenburg, Patrick, Kosmyntseva, Alena, Kozachuk, Anastasiia, Kozeiha, Mohamad, Kravchuk, Leonid, Kreplin, Katharina, Kreps, Michal, Krokovny, Pavel, Kruse, Florian, Krzemien, Wojciech, Kucewicz, Wojciech, Kucharczyk, Marcin, Kudryavtsev, Vasily, Kuonen, Axel Kevin, Kurek, Krzysztof, Kvaratskheliya, Tengiz, Lacarrere, Daniel, Lafferty, George, Lai, Adriano, Lambert, Dean, Lanfranchi, Gaia, Langenbruch, Christoph, Latham, Thomas, Lazzeroni, Cristina, Le Gac, Renaud, van Leerdam, Jeroen, Lees, Jean-Pierre, Leflat, Alexander, Lefrançois, Jacques, Lefèvre, Regis, 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Vazquez Gomez, Ricardo, Vazquez Regueiro, Pablo, Vecchi, Stefania, van Veghel, Maarten, Velthuis, Jaap, Veltri, Michele, Veneziano, Giovanni, Venkateswaran, Aravindhan, Vernet, Maxime, Vesterinen, Mika, Viaud, Benoit, Vieira, Daniel, Vieites Diaz, Maria, Vilasis-Cardona, Xavier, Volkov, Vladimir, Vollhardt, Achim, Voneki, Balazs, Vorobyev, Alexey, Vorobyev, Vitaly, Voß, Christian, de Vries, Jacco, Vázquez Sierra, Carlos, Waldi, Roland, Wallace, Charlotte, Wallace, Ronan, Walsh, John, Wang, Jianchun, Ward, David, Wark, Heather Mckenzie, Watson, Nigel, Websdale, David, Weiden, Andreas, Whitehead, Mark, Wicht, Jean, Wilkinson, Guy, Wilkinson, Michael, Williams, Mark Richard James, Williams, Matthew, Williams, Mike, Williams, Timothy, Wilson, Fergus, Wimberley, Jack, Wishahi, Julian, Wislicki, Wojciech, Witek, Mariusz, Wormser, Guy, Wotton, Stephen, Wraight, Kenneth, Wright, Simon, Wyllie, Kenneth, Xie, Yuehong, Xing, Zhou, Xu, Zhirui, Yang, Zhenwei, Yin, Hang, Yu, Jiesheng, Yuan, Xuhao, Yushchenko, Oleg, Zarebski, Kristian Alexander, Zavertyaev, Mikhail, Zhang, Liming, Zhang, Yanxi, Zhang, Yu, Zhelezov, Alexey, Zheng, Yangheng, Zhokhov, Anatoly, Zhu, Xianglei, Zhukov, Valery, Zucchelli, Stefano
Lenguaje:eng
Publicado: 2016
Materias:
Acceso en línea:https://dx.doi.org/10.1103/PhysRevLett.117.261801
http://cds.cern.ch/record/2209876
Descripción
Sumario:The $C\!P$ violation observables $S$ and $C$ in the decay channel $B^0 \!\rightarrow D^+ D^-$ are determined from a sample of proton-proton collisions at centre-of-mass energies of $7$ and $8$ TeV, collected by the LHCb experiment and corresponding to an integrated luminosity of $3~ {\text {fb}}^{-1}$. The observable $S$ describes $C\!P$ violation in the interference between mixing and the decay amplitude, and $C$ parametrizes direct $C\!P$ violation in the decay. The following values are obtained from a flavour-tagged, decay-time-dependent analysis: \begin{align*} S &= -0.54 \, ^{+0.17}_{-0.16} \, \text{(stat)} \pm 0.05 \, \text{(syst)}\,, \\ C &= \phantom{-}0.26 \, ^{+0.18}_{-0.17} \, \text{(stat)} \pm 0.02 \, \text{(syst)}\,. \end{align*} These values constrain higher-order Standard Model corrections to be small.