Paolo Franchini: Publications

Observation of tree-level B decays with ss̄ production from gluon radiation

Physical Review Letters 100:17 (2008)

Authors:

B Aubert, M Bona, D Boutigny, Y Karyotakis, JP Lees, V Poireau, X Prudent, V Tisserand, A Zghiche, J Garra Tico, E Grauges, L Lopez, A Palano, G Eigen, B Stugu, L Sun, GS Abrams, M Battaglia, DN Brown, J Button-Shafer, RN Cahn, Y Groysman, RG Jacobsen, JA Kadyk, LT Kerth, YG Kolomensky, G Kukartsev, D Lopes Pegna, G Lynch, LM Mir, TJ Orimoto, MT Ronan, K Tackmann, WA Wenzel, P Del Amo Sanchez, CM Hawkes, AT Watson, T Held, H Koch, B Lewandowski, M Pelizaeus, T Schroeder, M Steinke, D Walker, DJ Asgeirsson, T Cuhadar-Donszelmann, BG Fulsom, C Hearty, TS Mattison, JA McKenna, A Khan, M Saleem, L Teodorescu, VE Blinov, AD Bukin, VP Druzhinin, VB Golubev, AP Onuchin, SI Serednyakov, YI Skovpen, EP Solodov, KY Todyshev, M Bondioli, S Curry, I Eschrich, D Kirkby, AJ Lankford, P Lund, M Mandelkern, EC Martin, DP Stoker, S Abachi, C Buchanan, SD Foulkes, JW Gary, F Liu, O Long, BC Shen, L Zhang, HP Paar, S Rahatlou, V Sharma, JW Berryhill, C Campagnari, A Cunha, B Dahmes, TM Hong, D Kovalskyi, JD Richman, TW Beck, AM Eisner, CJ Flacco, CA Heusch, J Kroseberg, WS Lockman, T Schalk, BA Schumm, A Seiden, DC Williams, MG Wilson

Abstract:

We report on our search for decays proceeding via a tree-level b→c quark transition in which a gluon radiates into an ss̄ pair. We present observations of the decays B-→Ds(*)+K-π- and B̄0→ Ds+KS0π- and evidence for B-→Ds+K-K- and set upper limits on the branching fractions for B̄0→Ds*+KS0π- and B-→Ds*+K-K- using 383×106 Υ(4S)→BB̄ events collected by the BABAR detector at SLAC. We present evidence that the invariant mass distributions of Ds(*)+K- pairs from B-→Ds(*)+K-π- decays are inconsistent with the phase-space model, suggesting the presence of charm resonances lying below the Ds(*)+K- threshold. © 2008 The American Physical Society.

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Measurement of the branching fractions of exclusive B̄→D(*) (π)l-ν̄l decays in events with a fully reconstructed B meson

Physical Review Letters 100:15 (2008)

Authors:

B Aubert, M Bona, Y Karyotakis, JP Lees, V Poireau, X Prudent, V Tisserand, A Zghiche, J Garra Tico, E Grauges, L Lopez, A Palano, M Pappagallo, G Eigen, B Stugu, L Sun, GS Abrams, M Battaglia, DN Brown, J Button-Shafer, RN Cahn, RG Jacobsen, JA Kadyk, LT Kerth, YG Kolomensky, G Kukartsev, G Lynch, IL Osipenkov, MT Ronan, K Tackmann, T Tanabe, WA Wenzel, P Del Amo Sanchez, CM Hawkes, N Soni, AT Watson, H Koch, T Schroeder, D Walker, DJ Asgeirsson, T Cuhadar-Donszelmann, BG Fulsom, C Hearty, TS Mattison, JA McKenna, M Barrett, A Khan, M Saleem, L Teodorescu, VE Blinov, AD Bukin, AR Buzykaev, VP Druzhinin, VB Golubev, AP Onuchin, SI Serednyakov, YI Skovpen, EP Solodov, KY Todyshev, M Bondioli, S Curry, I Eschrich, D Kirkby, AJ Lankford, P Lund, M Mandelkern, EC Martin, DP Stoker, S Abachi, C Buchanan, JW Gary, F Liu, O Long, BC Shen, GM Vitug, Z Yasin, L Zhang, HP Paar, S Rahatlou, V Sharma, C Campagnari, TM Hong, D Kovalskyi, JD Richman, TW Beck, AM Eisner, CJ Flacco, CA Heusch, J Kroseberg, WS Lockman, T Schalk, BA Schumm, A Seiden, MG Wilson, LO Winstrom, E Chen, CH Cheng, DA Doll, B Echenard, F Fang

Abstract:

We report a measurement of the branching fractions for B̄→ D(*)(π)-ν̄ decays based on 341.1fb-1 of data collected at the Υ(4S) resonance with the BABAR detector at the SLAC PEP-II e+e- storage rings. Events are tagged by fully reconstructing one of the B mesons in a hadronic decay mode. We obtain B(B-→D0-ν̄)=(2.33±0. 09stat±0.09syst)%, B(B-→D*0-ν̄)=(5.83±0. 15stat±0.30syst)%, B(B̄0→D+-ν̄)=(2.21±0. 11stat±0.12syst)%, B(B̄0→D*+-ν̄)=(5.49±0. 16stat±0.25syst)%, B(B-→D+π - ν̄)=(0.42±0. 06stat±0.03syst)%, B(B-→D*+π - ν̄)=(0.59±0. 05stat±0.04syst)%, B(B̄0→D0π+-ν̄)=(0.43±0. 08stat±0.03syst)%, and B(B̄0→D*0π+-ν̄)=(0. 48±0.08stat±0.04syst)%. © 2008 The American Physical Society.

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Search for CPT and lorentz violation in B0-B̄0 oscillations with dilepton events

Physical Review Letters 100:13 (2008)

Authors:

B Aubert, M Bona, D Boutigny, Y Karyotakis, JP Lees, V Poireau, X Prudent, V Tisserand, A Zghiche, J Garra Tico, E Grauges, L Lopez, A Palano, M Pappagallo, G Eigen, B Stugu, L Sun, GS Abrams, M Battaglia, DN Brown, J Button-Shafer, RN Cahn, Y Groysman, RG Jacobsen, JA Kadyk, LT Kerth, YG Kolomensky, G Kukartsev, DL Pegna, G Lynch, LM Mir, TJ Orimoto, IL Osipenkov, MT Ronan, K Tackmann, T Tanabe, WA Wenzel, P Del Amo Sanchez, CM Hawkes, AT Watson, H Koch, T Schroeder, D Walker, DJ Asgeirsson, T Cuhadar-Donszelmann, BG Fulsom, C Hearty, TS Mattison, JA McKenna, M Barrett, A Khan, M Saleem, L Teodorescu, VE Blinov, AD Bukin, VP Druzhinin, VB Golubev, AP Onuchin, SI Serednyakov, YI Skovpen, EP Solodov, KY Todyshev, M Bondioli, S Curry, I Eschrich, D Kirkby, AJ Lankford, P Lund, M Mandelkern, EC Martin, DP Stoker, S Abachi, C Buchanan, JW Gary, F Liu, O Long, BC Shen, GM Vitug, L Zhang, HP Paar, S Rahatlou, V Sharma, JW Berryhill, C Campagnari, A Cunha, B Dahmes, TM Hong, D Kovalskyi, JD Richman, TW Beck, AM Eisner, CJ Flacco, CA Heusch, J Kroseberg, WS Lockman, T Schalk, BA Schumm, A Seiden, MG Wilson, LO Winstrom

Abstract:

We report results of a search for CPT and Lorentz violation in B0-B0 oscillations using inclusive dilepton events from 232106 Î¥(4S)BB decays recorded by the BABAR detector at the PEP-II B Factory at SLAC. We find 2.8Ï significance, compatible with no signal, for variations in the complex CPT violation parameter z at the Earths sidereal frequency and extract values for the quantities Î"aÎ in the general Lorentz-violating standard-model extension. The spectral powers for variations in z over the frequency range 0.26yr-1 to 2.1solarday-1 are also compatible with no signal. © 2008 The American Physical Society.

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Search for lepton flavor violating decays τ±→l± ω

Physical Review Letters 100:7 (2008)

Authors:

B Aubert, M Bona, Y Karyotakis, JP Lees, V Poireau, X Prudent, V Tisserand, A Zghiche, J Garra Tico, E Grauges, L Lopez, A Palano, M Pappagallo, G Eigen, B Stugu, L Sun, GS Abrams, M Battaglia, DN Brown, J Button-Shafer, RN Cahn, RG Jacobsen, JA Kadyk, LT Kerth, YG Kolomensky, G Kukartsev, D Lopes Pegna, G Lynch, TJ Orimoto, IL Osipenkov, MT Ronan, K Tackmann, T Tanabe, WA Wenzel, P Del Amo Sanchez, CM Hawkes, N Soni, AT Watson, H Koch, T Schroeder, D Walker, DJ Asgeirsson, T Cuhadar-Donszelmann, BG Fulsom, C Hearty, TS Mattison, JA McKenna, M Barrett, A Khan, M Saleem, L Teodorescu, VE Blinov, AD Bukin, AR Buzykaev, VP Druzhinin, VB Golubev, AP Onuchin, SI Serednyakov, YI Skovpen, EP Solodov, KY Todyshev, M Bondioli, S Curry, I Eschrich, D Kirkby, AJ Lankford, P Lund, M Mandelkern, EC Martin, DP Stoker, S Abachi, C Buchanan, JW Gary, F Liu, O Long, BC Shen, GM Vitug, L Zhang, HP Paar, S Rahatlou, V Sharma, JW Berryhill, C Campagnari, A Cunha, B Dahmes, TM Hong, D Kovalskyi, JD Richman, TW Beck, AM Eisner, CJ Flacco, CA Heusch, J Kroseberg, WS Lockman, T Schalk, BA Schumm, A Seiden, MG Wilson, LO Winstrom, E Chen

Abstract:

A search for lepton flavor violating decays of a τ to a lighter-mass charged lepton and an ω vector meson is performed using 384.1fb-1 of e+e- annihilation data collected with the BABAR detector at the Stanford Linear Accelerator Center PEP-II storage ring. No signal is found, and the upper limits on the branching ratios are determined to be B(τ±→e± ω)<1.1×10-7 and B(τ±→μ±ω)<1. 0×10-7 at 90% confidence level. © 2008 The American Physical Society.

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Search for CP violation in the decays D0→K-K+ and D0→π-π+

Physical Review Letters 100:6 (2008)

Authors:

B Aubert, M Bona, D Boutigny, Y Karyotakis, JP Lees, V Poireau, X Prudent, V Tisserand, A Zghiche, J Garra Tico, E Grauges, L Lopez, A Palano, M Pappagallo, G Eigen, B Stugu, L Sun, GS Abrams, M Battaglia, DN Brown, J Button-Shafer, RN Cahn, Y Groysman, RG Jacobsen, JA Kadyk, LT Kerth, YG Kolomensky, G Kukartsev, D Lopes Pegna, G Lynch, LM Mir, TJ Orimoto, IL Osipenkov, MT Ronan, K Tackmann, T Tanabe, WA Wenzel, P Del Amo Sanchez, CM Hawkes, AT Watson, H Koch, T Schroeder, D Walker, DJ Asgeirsson, T Cuhadar-Donszelmann, BG Fulsom, C Hearty, TS Mattison, JA McKenna, M Barrett, A Khan, M Saleem, L Teodorescu, VE Blinov, AD Bukin, VP Druzhinin, VB Golubev, AP Onuchin, SI Serednyakov, YI Skovpen, EP Solodov, KY Todyshev, M Bondioli, S Curry, I Eschrich, D Kirkby, AJ Lankford, P Lund, M Mandelkern, EC Martin, DP Stoker, S Abachi, C Buchanan, SD Foulkes, JW Gary, F Liu, O Long, BC Shen, GM Vitug, L Zhang, HP Paar, S Rahatlou, V Sharma, JW Berryhill, C Campagnari, A Cunha, B Dahmes, TM Hong, D Kovalskyi, JD Richman, TW Beck, AM Eisner, CJ Flacco, CA Heusch, J Kroseberg, WS Lockman, T Schalk, BA Schumm, A Seiden, MG Wilson

Abstract:

We measure time-integrated CP-violating asymmetries of neutral charmed mesons in the modes D0→K-K+ and D0→π-π+ with the highest precision to date by using D0→K-π+ decays to correct detector asymmetries. An analysis of 385.8fb-1 of data collected with the BABAR detector yields values of aCPKK=(0.00±0.34(stat)±0.13(syst))% and aCPππ=(-0.24±0.52(stat)±0.22(syst))%, which agree with standard model predictions. © 2008 The American Physical Society.

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Paolo Franchini

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Observation of tree-level B decays with ss̄ production from gluon radiation

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Measurement of the branching fractions of exclusive B̄→D(*) (π)l-ν̄l decays in events with a fully reconstructed B meson

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Abstract:

Search for CPT and lorentz violation in B0-B̄0 oscillations with dilepton events

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Search for lepton flavor violating decays τ±→l± ω

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Search for CP violation in the decays D0→K-K+ and D0→π-π+

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