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Measurement of the ratios of branching fractions $\mathcal{R}(D^{})$ and $\mathcal{R}(D^{0})

Aaij, Roel ; Abdelmotteleb, Ahmed Sameh Wagih ; Abellan Beteta, Carlos ; Abudinén, Fernando Jesus ; Ackernley, Thomas ; Adeva, Bernardo ; Adinolfi, Marco ; Adlarson, Patrik Harri ; Afsharnia, Hossein ; Agapopoulou, Christina ; Aidala, Christine Angela ; Ajaltouni, Ziad ; Akar, Simon ; Akiba, Kazuyoshi ; Albicocco, Pietro ; Albrecht, Johannes ; Alessio, Federico ; Alexander, Michael ; Alfonso Albero, Alejandro ; Aliouche, Zakariya ; Alvarez Cartelle, Paula ; Amalric, Renaud ; Amato, Sandra ; Amey, Jake Lewis ; Amhis, Yasmine ; An, Liupan ; Anderlini, Lucio ; Andersson, Martin ; Andreianov, Aleksei ; Andreotti, Mirco ; Andreou, Dimitra ; Ao, Dong ; Archilli, Flavio ; Artamonov, Alexander ; Artuso, Marina ; Aslanides, Elie ; Atzeni, Michele ; Audurier, Benjamin ; Bachiller Perea, Irene ; Bachmann, Sebastian ; Bachmayer, Marie ; Back, John ; Bailly-Reyre, Aurelien ; Baladron Rodriguez, Pablo ; Balagura, Vladislav ; Baldini, Wander ; Baptista de Souza Leite, Juan ; Barbetti, Matteo ; Barlow, Roger ; Barsuk, Sergey ; Barter, William ; Bartolini, Matteo ; Baryshnikov, Fedor ; Basels, Jan-Marc ; Bassi, Giovanni ; Batsukh, Baasansuren ; Battig, Alexander ; Bay, Aurelio ; Beck, Anja ; Becker, Maik ; Bedeschi, Franco ; Bediaga, Ignacio ; Beiter, Andrew ; Belin, Samuel ; Bellee, Violaine ; Belous, Konstantin ; Belov, Ilia ; Belyaev, Ivan ; Benane, Gaya ; Bencivenni, Giovanni ; Ben-Haim, Eli ; Berezhnoy, Alexander ; Bernet, Roland ; Bernet Andres, Sergi ; Berninghoff, Daniel ; Bernstein, Harris Conan ; Bertella, Claudia ; Bertolin, Alessandro ; Betancourt, Christopher ; Betti, Federico ; Bezshyiko, Iaroslava ; Bhasin, Srishti ; Bhom, Jihyun ; Bian, Lingzhu ; Bieker, Martin Stefan ; Biesuz, Nicolo Vladi ; Billoir, Pierre ; Biolchini, Alice ; Birch, Matthew ; Bishop, Fionn Caitlin Ros ; Bitadze, Alexander ; Bizzeti, Andrea ; Blago, Michele Piero ; Blake, Thomas ; Blanc, Frederic ; Blank, Jonah Evan ; Blusk, Steven ; Bobulska, Dana ; Boelhauve, Julian Alexander ; Boente Garcia, Oscar

Physical review letters, 2023-02, Vol.131 [Periódico revisado por pares]

American Physical Society

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Título:
Measurement of the ratios of branching fractions $\mathcal{R}(D^{})$ and $\mathcal{R}(D^{0})
Autor: Aaij, Roel ; Abdelmotteleb, Ahmed Sameh Wagih ; Abellan Beteta, Carlos ; Abudinén, Fernando Jesus ; Ackernley, Thomas ; Adeva, Bernardo ; Adinolfi, Marco ; Adlarson, Patrik Harri ; Afsharnia, Hossein ; Agapopoulou, Christina ; Aidala, Christine Angela ; Ajaltouni, Ziad ; Akar, Simon ; Akiba, Kazuyoshi ; Albicocco, Pietro ; Albrecht, Johannes ; Alessio, Federico ; Alexander, Michael ; Alfonso Albero, Alejandro ; Aliouche, Zakariya ; Alvarez Cartelle, Paula ; Amalric, Renaud ; Amato, Sandra ; Amey, Jake Lewis ; Amhis, Yasmine ; An, Liupan ; Anderlini, Lucio ; Andersson, Martin ; Andreianov, Aleksei ; Andreotti, Mirco ; Andreou, Dimitra ; Ao, Dong ; Archilli, Flavio ; Artamonov, Alexander ; Artuso, Marina ; Aslanides, Elie ; Atzeni, Michele ; Audurier, Benjamin ; Bachiller Perea, Irene ; Bachmann, Sebastian ; Bachmayer, Marie ; Back, John ; Bailly-Reyre, Aurelien ; Baladron Rodriguez, Pablo ; Balagura, Vladislav ; Baldini, Wander ; Baptista de Souza Leite, Juan ; Barbetti, Matteo ; Barlow, Roger ; Barsuk, Sergey ; Barter, William ; Bartolini, Matteo ; Baryshnikov, Fedor ; Basels, Jan-Marc ; Bassi, Giovanni ; Batsukh, Baasansuren ; Battig, Alexander ; Bay, Aurelio ; Beck, Anja ; Becker, Maik ; Bedeschi, Franco ; Bediaga, Ignacio ; Beiter, Andrew ; Belin, Samuel ; Bellee, Violaine ; Belous, Konstantin ; Belov, Ilia ; Belyaev, Ivan ; Benane, Gaya ; Bencivenni, Giovanni ; Ben-Haim, Eli ; Berezhnoy, Alexander ; Bernet, Roland ; Bernet Andres, Sergi ; Berninghoff, Daniel ; Bernstein, Harris Conan ; Bertella, Claudia ; Bertolin, Alessandro ; Betancourt, Christopher ; Betti, Federico ; Bezshyiko, Iaroslava ; Bhasin, Srishti ; Bhom, Jihyun ; Bian, Lingzhu ; Bieker, Martin Stefan ; Biesuz, Nicolo Vladi ; Billoir, Pierre ; Biolchini, Alice ; Birch, Matthew ; Bishop, Fionn Caitlin Ros ; Bitadze, Alexander ; Bizzeti, Andrea ; Blago, Michele Piero ; Blake, Thomas ; Blanc, Frederic ; Blank, Jonah Evan ; Blusk, Steven ; Bobulska, Dana ; Boelhauve, Julian Alexander ; Boente Garcia, Oscar
Assuntos: High Energy Physics - Experiment ; Physics
É parte de: Physical review letters, 2023-02, Vol.131
Descrição: The ratios of branching fractions $\mathcal{R}(D^{*})\equiv\mathcal{B}(\bar{B}\to D^{*}\tau^{-}\bar{\nu}_{\tau})/\mathcal{B}(\bar{B}\to D^{*}\mu^{-}\bar{\nu}_{\mu})$ and $\mathcal{R}(D^{0})\equiv\mathcal{B}(B^{-}\to D^{0}\tau^{-}\bar{\nu}_{\tau})/\mathcal{B}(B^{-}\to D^{0}\mu^{-}\bar{\nu}_{\mu})$ are measured, assuming isospin symmetry, using a sample of proton-proton collision data corresponding to 3.0 fb${ }^{-1}$ of integrated luminosity recorded by the LHCb experiment during 2011 and 2012. The tau lepton is identified in the decay mode $\tau^{-}\to\mu^{-}\nu_{\tau}\bar{\nu}_{\mu}$. The measured values are $\mathcal{R}(D^{*})=0.281\pm0.018\pm0.024$ and $\mathcal{R}(D^{0})=0.441\pm0.060\pm0.066$, where the first uncertainty is statistical and the second is systematic. The correlation between these measurements is $\rho=-0.43$. Results are consistent with the current average of these quantities and are at a combined 1.9 standard deviations from the predictions based on lepton flavor universality in the Standard Model.
Editor: American Physical Society
Idioma: Inglês

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Measurement of the ratios of branching fractions $\mathcal{R}(D^{})$ and $\mathcal{R}(D^{0})

American Physical Society

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