Paolo Franchini: Publications

Measurement of the branching fractions of B̄→D**ℓ-ν̄ℓ decays in events tagged by a fully reconstructed B meson

Physical Review Letters 101:26 (2008)

Authors:

B Aubert, M Bona, Y Karyotakis, JP Lees, V Poireau, E Prencipe, X Prudent, V Tisserand, JG Tico, E Grauges, L Lopez, A Palano, M Pappagallo, G Eigen, B Stugu, L Sun, GS Abrams, M Battaglia, DN Brown, RN Cahn, RG Jacobsen, LT Kerth, YG Kolomensky, G Lynch, IL Osipenkov, MT Ronan, K Tackmann, T Tanabe, CM Hawkes, N Soni, AT Watson, H Koch, T Schroeder, D Walker, DJ Asgeirsson, BG Fulsom, C Hearty, TS Mattison, JA McKenna, M Barrett, A Khan, 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, V Sharma, C Campagnari, TM Hong, D Kovalskyi, MA Mazur, JD Richman, TW Beck, AM Eisner, CJ Flacco, CA Heusch, J Kroseberg, WS Lockman, T Schalk, BA Schumm, A Seiden, L Wang, MG Wilson, LO Winstrom, CH Cheng, DA Doll, B Echenard, F Fang, DG Hitlin, I Narsky, T Piatenko, FC Porter, R Andreassen, G Mancinelli, BT Meadows, K Mishra, MD Sokoloff

Abstract:

We report a measurement of the branching fractions of B̄→D* *ℓ-ν̄ℓ decays based on 417fb-1 of data collected at the Υ(4S) resonance with the BABAR detector at the PEP-II e+e- storage rings. Events are selected by fully reconstructing one of the B mesons in a hadronic decay mode. A fit to the invariant mass differences m(D(*)π)- m(D(*)) is performed to extract the signal yields of the different D** states. We observe the B̄→D**ℓ- ν̄ℓ decay modes corresponding to the four D** states predicted by heavy quark symmetry with a significance greater than 5 standard deviations including systematic uncertainties. © 2008 The American Physical Society.

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Measurement of the CP asymmetry in b→sγ using a sum of exclusive final states

Physical Review Letters 101:17 (2008)

Authors:

B Aubert, M Bona, Y Karyotakis, JP Lees, V Poireau, X Prudent, V Tisserand, A Zghiche, JG 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, 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, MA Mazur, 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 perform a measurement of the CP asymmetry in b→sγ decays using a sample of 383×106 BB̄ events collected by the BABAR detector at the SLAC PEP-II asymmetric B factory. We reconstruct 16 flavor-specific B decay modes containing a high-energy photon and a hadronic system Xs containing an s quark. We measure the CP asymmetry to be -0.011±0.030(stat) ±0.014(syst) for a hadronic system mass between 0.6 and 2.8GeV/c2. © 2008 The American Physical Society.

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Observation and polarization measurements of B±→φK1± and B±→φK2*±

Physical Review Letters 101:16 (2008)

Authors:

B Aubert, M Bona, Y Karyotakis, JP Lees, V Poireau, E Prencipe, X Prudent, V Tisserand, J Garra Tico, E Grauges, L Lopez, A Palano, M Pappagallo, G Eigen, B Stugu, L Sun, GS Abrams, M Battaglia, DN Brown, RN Cahn, RG Jacobsen, LT Kerth, YG Kolomensky, G Kukartsev, G Lynch, IL Osipenkov, MT Ronan, K Tackmann, T Tanabe, CM Hawkes, N Soni, AT Watson, H Koch, T Schroeder, D Walker, DJ Asgeirsson, BG Fulsom, C Hearty, TS Mattison, JA McKenna, M Barrett, A Khan, 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, V Sharma, C Campagnari, TM Hong, D Kovalskyi, MA Mazur, JD Richman, TW Beck, AM Eisner, CJ Flacco, CA Heusch, J Kroseberg, WS Lockman, T Schalk, BA Schumm, A Seiden, L Wang, MG Wilson, LO Winstrom, CH Cheng, DA Doll, B Echenard, F Fang, DG Hitlin, I Narsky, T Piatenko, FC Porter, R Andreassen, G Mancinelli, BT Meadows

Abstract:

With the full BABAR data sample of 465×106 BB̄ pairs, we observe the decays B±→φK1(1270)± and B±→φK2 *(1430)±. We measure the branching fractions (6.1±1.6±1. 1)×10-6 and (8.4±1.8±1.0)×10-6 and the fractions of longitudinal polarization 0.46-0.13-0.07+0.12+0.06 and 0.80-0.10+0.09±0. 03, respectively. We also report on the B±→φK0*(1430) ± decay branching fraction of (7.0±1.3±0.9)×10-6 and several parameters sensitive to CP violation and interference in the above three decays. Upper limits are placed on the B± decay rates to final states with φ and K1(1400)±, K*(1410)±, K2(1770)±, or K2(1820)±. Understanding the observed polarization pattern requires amplitude contributions from an uncertain source. © 2008 The American Physical Society.

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Study of B meson decays with excited η and η′ mesons

Physical Review Letters 101:9 (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, T Held, H Koch, M Pelizaeus, T Schroeder, M Steinke, 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, 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

Abstract:

Using 383×106 BB̄ pairs from the BABAR data sample, we report results for branching fractions of six charged B-meson decay modes, where a charged kaon recoils against a charmless resonance decaying to KK̄* or ηππ final states with mass in the range (1.2-1.8)GeV/c2. We observe a significant enhancement at the low KK̄* invariant mass which is interpreted as B+→η(1475)K+, find evidence for the decay B+→η(1295)K+, and place upper limits on the decays B+→η(1405) K+, B+→f1(1285)K+, B+→f1(1420)K+, and B+→(1680)K+. © 2008 The American Physical Society.

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Evidence for CP violation in B0→J/ψπ0 decays

Physical Review Letters 101:2 (2008)

Authors:

B Aubert, M Bona, Y Karyotakis, JP Lees, V Poireau, E Prencipe, X Prudent, V Tisserand, JG 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, 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, V Sharma, C Campagnari, TM Hong, D Kovalskyi, MA Mazur, JD Richman, TW Beck, AM Eisner, CJ Flacco, CA Heusch, J Kroseberg, WS Lockman, T Schalk, BA Schumm, A Seiden, L Wang, MG Wilson, LO Winstrom, CH Cheng, DA Doll, B Echenard, F Fang, DG Hitlin, I Narsky

Abstract:

We present measurements of the branching fraction and time-dependent CP asymmetries in B0→J/ψπ0 decays based on 466×106 Υ(4S)→BB̄ events collected with the BABAR detector at the SLAC PEP-II asymmetric-energy B factory. We measure the CP asymmetry parameters S=-1.23±0.21(stat)±0.04(syst) and C=-0.20±0.19(stat) ±0.03(syst), where the measured value of (S, C) is 4.0 standard deviations from (0, 0) including systematic uncertainties. The branching fraction is determined to be B(B0→J/ψπ0)=[1.69±0.14(stat) ±0.07(syst)]×10-5. © 2008 The American Physical Society.

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Paolo Franchini

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Measurement of the branching fractions of B̄→D**ℓ-ν̄ℓ decays in events tagged by a fully reconstructed B meson

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Measurement of the CP asymmetry in b→sγ using a sum of exclusive final states

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Observation and polarization measurements of B±→φK1± and B±→φK2*±

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Study of B meson decays with excited η and η′ mesons

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Evidence for CP violation in B0→J/ψπ0 decays

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