Measurements of direct CP asymmetries in B →xsγ decays using sum of exclusive decays

Lees, J.P.; Poireau, V.; Tisserand, V.; Grauges, E.; Palano, A.; Eigen, G.; Stugu, B.; Brown, D.N.; Kerth, L.T.; Kolomensky, Y.G.; Lee, M.J.; Lynch, G.; Koch, H.; Schroeder, T.; Hearty, C.; Mattison, T.S.; Mckenna, J.A.; R. Y., S.; Khan, A.; Blinov, V.E.; Buzykaev, A.R.; Druzhinin, V.P.; Golubev, V.B.; Kravchenko, E.A.; Onuchin, A.P.; Serednyakov, S.I.; Skovpen, Y.I.; Solodov, E.P.; Todyshev, K.Y.; Yushkov, A.N.; Kirkby, D.; Lankford, A.J.; Mandelkern, M.; Dey, B.; Gary, J.W.; Long, O.; Campagnari, C.; Franco Sevilla, M.; Hong, T.M.; Kovalskyi, D.; Richman, J.D.; West, C.A.; Eisner, A.M.; Lockman, W.S.; Schumm, B.A.; Seiden, A.; Chao, D.S.; Cheng, C.H.; Echenard, B.; Flood, K.T.; Hitlin, D.G.; Ongmongkolkul, P.; Porter, F.C.; Andreassen, R.; Huard, Z.; Meadows, B.T.; Pushpawela, B.G.; Sokoloff, M.D.; Sun, L.; Bloom, P.C.; Ford, W.T.; Gaz, A.; Nauenberg, U.; Smith, J.G.; Wagner, S.R.; Ayad, R.; Toki, W.H.; Spaan, B.; Schwierz, R.; Bernard, D.; Verderi, M.; Playfer, S.; Bettoni, D.; Bozzi, C.; Calabrese, R.; Cibinetto, G.; Fioravanti, E.; Garzia, I.; Luppi, E.; Piemontese, L.; Santoro, V.; Baldini Ferroli, R.; Calcaterra, A.; De Sangro, R.; Finocchiaro, G.; Martellotti, S.; Patteri, P.; Peruzzi, I.M.; Piccolo, M.; Rama, M.; Zallo, A.; Contri, R.; Guido, E.; Lo Vetere, M.; Monge, M.R.; Passaggio, S.; Patrignani, C.; Robutti, E.; Bhuyan, B.; Prasad, V.; Morii, M.; Adametz, A.; Uwer, U.; Lacker, H.M.; Dauncey, P.D.; Mallik, U.; Chen, C.; Cochran, J.; Meyer, W.T.; Prell, S.; Ahmed, H.; Gritsan, A.V.; Arnaud, N.; Davier, M.; Derkach, D.; Grosdidier, G.; Le Diberder, F.; Lutz, A.M.; Malaescu, B.; Roudeau, P.; Stocchi, A.; Wormser, G.; Lange, D.J.; Wright, D.M.; Coleman, J.P.; Fry, J.R.; Gabathuler, E.; Hutchcroft, D.E.; Payne, D.J.; Touramanis, C.; Bevan, A.J.; Di Lodovico, F.; Sacco, R.; Cowan, G.; Bougher, J.; Brown, D.N.; Davis, C.L.; Denig, A.G.; Fritsch, M.; Gradl, W.; Griessinger, K.; Hafner, A.; Prencipe, E.; Schubert, K.R.; Barlow, R.J.; Lafferty, G.D.; Behn, E.; Cenci, R.; Hamilton, B.; Jawahery, A.; Roberts, D.A.; Cowan, R.; Dujmic, D.; Sciolla, G.; Cheaib, R.; Patel, P.M.; Robertson, S.H.; Biassoni, P.; Neri, N.; Palombo, F.; Cremaldi, L.; Godang, R.; Sonnek, P.; Summers, D.J.; Simard, M.; Taras, P.; De Nardo, G.; Monorchio, D.; Onorato, G.; Sciacca, C.; Martinelli, M.; Raven, G.; Jessop, C.P.; Losecco, J.M.; Honscheid, K.; Kass, R.; Brau, J.; Frey, R.; Sinev, N.B.; Strom, D.; Torrence, E.; Ahmed, H.; Feltresi, E.; Margoni, M.; Morandin, M.; Posocco, M.; Rotondo, M.; Simi, G.; Simonetto, F.; Stroili, R.; Akar, S.; Ben Haim, E.; Bomben, M.; Bonneaud, G.R.; Briand, H.; Calderini, G.; Chauveau, J.; Leruste, P.; Marchiori, G.; Ocariz, J.; Sitt, S.; Biasini, M.; Manoni, E.; Pacetti, S.; Rossi, A.; Angelini, C.; Batignani, G.; Bettarini, S.; Carpinelli, M.; Casarosa, G.; Cervelli, A.; Forti, F.; Giorgi, M.A.; Lusiani, A.; Oberhof, B.; Paoloni, E.; Perez, A.; Rizzo, G.; Walsh, J.J.; Lopes Pegna, D.; Olsen, J.; Smith, A.J.S.; Faccini, R.; Ferrarotto, F.; Ferroni, F.; Gaspero, M.; Li Gioi, L.; Piredda, G.; Bünger, C.; Grünberg, O.; Hartmann, T.; Leddig, T.; Voß, C.; Waldi, R.; Adye, T.; Olaiya, E.O.; Wilson, F.F.; Emery, S.; Hamel De Monchenault, G.; Vasseur, G.; Yèche, C.; Anulli, F.; Aston, D.; Bard, D.J.; Benitez, J.F.; Cartaro, C.; Convery, M.R.; Dorfan, J.; Dubois Felsmann, G.P.; Dunwoodie, W.; Ebert, M.; Field, R.C.; Fulsom, B.G.; Gabareen, A.M.; Graham, M.T.; Hast, C.; Innes, W.R.; Kim, P.; Kocian, M.L.; Leith, D.W.G.S.; Lewis, P.; Lindemann, D.; Lindquist, B.; Luitz, S.; Luth, V.; Lynch, H.L.; Macfarlane, D.B.; Muller, D.R.; Neal, H.; Nelson, S.; Perl, M.; Pulliam, T.; Ratcliff, B.N.; Roodman, A.; Salnikov, A.A.; Schindler, R.H.; Snyder, A.; Su, D.; Sullivan, M.K.; Va'Vra, J.; Wagner, A.P.; Wang, W.F.; Wisniewski, W.J.; Wittgen, M.; Wright, D.H.; Wulsin, H.W.; Ziegler, V.; Park, W.; Purohit, M.V.; White, R.M.; Wilson, J.R.; Randle Conde, A.; Sekula, S.J.; Bellis, M.; Burchat, P.R.; Miyashita, T.S.; Puccio, E.M.T.; Alam, M.S.; Ernst, J.A.; Gorodeisky, R.; Guttman, N.; Peimer, D.R.; Soffer, A.; Spanier, S.M.; Ritchie, J.L.; Ruland, A.M.; Schwitters, R.F.; Wray, B.C.; Izen, J.M.; Lou, X.C.; Bianchi, F.; De Mori, F.; Filippi, A.; Gamba, D.; Zambito, S.; Lanceri, L.; Vitale, L.; Martinez Vidal, F.; Oyanguren, A.; Villanueva Perez, P.; Albert, J.; Banerjee, S.; Bernlochner, F.U.; Choi, H.H.F.; King, G.J.; Kowalewski, R.; Lewczuk, M.J.; Lueck, T.; Nugent, I.M.; Roney, J.M.; Sobie, R.J.; Tasneem, N.; Gershon, T.J.; Harrison, P.F.; Latham, T.E.; Band, H.R.; Dasu, S.; Pan, Y.; Prepost, R.; S. L., W.

doi:10.1103/PhysRevD.90.092001

We measure the direct CP violation asymmetry, ACP, in B→Xsγ and the isospin difference of the asymmetry, ΔACP, using 429fb-1 of data collected at(4S) resonance with the BABAR detector at the PEP-II asymmetric-energy e+e- storage rings operating at the SLAC National Accelerator Laboratory. B mesons are reconstructed from ten charged B final states and six neutral B final states. We find ACP=+(1.7±1.9±1.0)%, which is in agreement with the Standard Model prediction and provides an improvement on the world average. Moreover, we report the first measurement of the difference between ACP for charged and neutral decay modes, ΔACP=+(5.0±3.9±1.5)%. Using the value of ΔACP, we also provide 68% and 90% confidence intervals on the imaginary part of the ratio of the Wilson coefficients corresponding to the chromomagnetic dipole and the electromagnetic dipole transitions.

Measurements of direct CP asymmetries in B →xsγ decays using sum of exclusive decays / J.P. Lees, V. Poireau, V. Tisserand, E. Grauges, A. Palano, G. Eigen, B. Stugu, D.N. Brown, L.T. Kerth, Y.G. Kolomensky, M.J. Lee, G. Lynch, H. Koch, T. Schroeder, C. Hearty, T.S. Mattison, J.A. Mckenna, R.Y. So, A. Khan, V.E. Blinov, A.R. Buzykaev, V.P. Druzhinin, V.B. Golubev, E.A. Kravchenko, A.P. Onuchin, S.I. Serednyakov, Y.I. Skovpen, E.P. Solodov, K.Y. Todyshev, A.N. Yushkov, D. Kirkby, A.J. Lankford, M. Mandelkern, B. Dey, J.W. Gary, O. Long, C. Campagnari, M. Franco Sevilla, T.M. Hong, D. Kovalskyi, J.D. Richman, C.A. West, A.M. Eisner, W.S. Lockman, B.A. Schumm, A. Seiden, D.S. Chao, C.H. Cheng, B. Echenard, K.T. Flood, D.G. Hitlin, P. Ongmongkolkul, F.C. Porter, R. Andreassen, Z. Huard, B.T. Meadows, B.G. Pushpawela, M.D. Sokoloff, L. Sun, P.C. Bloom, W.T. Ford, A. Gaz, U. Nauenberg, J.G. Smith, S.R. Wagner, R. Ayad, W.H. Toki, B. Spaan, R. Schwierz, D. Bernard, M. Verderi, S. Playfer, D. Bettoni, C. Bozzi, R. Calabrese, G. Cibinetto, E. Fioravanti, I. Garzia, E. Luppi, L. Piemontese, V. Santoro, R. Baldini-Ferroli, A. Calcaterra, R. De Sangro, G. Finocchiaro, S. Martellotti, P. Patteri, I.M. Peruzzi, M. Piccolo, M. Rama, A. Zallo, R. Contri, E. Guido, M. Lo Vetere, M.R. Monge, S. Passaggio, C. Patrignani, E. Robutti, B. Bhuyan, V. Prasad, M. Morii, A. Adametz, U. Uwer, H.M. Lacker, P.D. Dauncey, U. Mallik, C. Chen, J. Cochran, W.T. Meyer, S. Prell, H. Ahmed, A.V. Gritsan, N. Arnaud, M. Davier, D. Derkach, G. Grosdidier, F. Le Diberder, A.M. Lutz, B. Malaescu, P. Roudeau, A. Stocchi, G. Wormser, D.J. Lange, D.M. Wright, J.P. Coleman, J.R. Fry, E. Gabathuler, D.E. Hutchcroft, D.J. Payne, C. Touramanis, A.J. Bevan, F. Di Lodovico, R. Sacco, G. Cowan, J. Bougher, D.N. Brown, C.L. Davis, A.G. Denig, M. Fritsch, W. Gradl, K. Griessinger, A. Hafner, E. Prencipe, K.R. Schubert, R.J. Barlow, G.D. Lafferty, E. Behn, R. Cenci, B. Hamilton, A. Jawahery, D.A. Roberts, R. Cowan, D. Dujmic, G. Sciolla, R. Cheaib, P.M. Patel, S.H. Robertson, P. Biassoni, N. Neri, F. Palombo, L. Cremaldi, R. Godang, P. Sonnek, D.J. Summers, M. Simard, P. Taras, G. De Nardo, D. Monorchio, G. Onorato, C. Sciacca, M. Martinelli, G. Raven, C.P. Jessop, J.M. Losecco, K. Honscheid, R. Kass, J. Brau, R. Frey, N.B. Sinev, D. Strom, E. Torrence, H. Ahmed, E. Feltresi, M. Margoni, M. Morandin, M. Posocco, M. Rotondo, G. Simi, F. Simonetto, R. Stroili, S. Akar, E. Ben-Haim, M. Bomben, G.R. Bonneaud, H. Briand, G. Calderini, J. Chauveau, P. Leruste, G. Marchiori, J. Ocariz, S. Sitt, M. Biasini, E. Manoni, S. Pacetti, A. Rossi, C. Angelini, G. Batignani, S. Bettarini, M. Carpinelli, G. Casarosa, A. Cervelli, F. Forti, M.A. Giorgi, A. Lusiani, B. Oberhof, E. Paoloni, A. Perez, G. Rizzo, J.J. Walsh, D. Lopes Pegna, J. Olsen, A.J.S. Smith, R. Faccini, F. Ferrarotto, F. Ferroni, M. Gaspero, L. Li Gioi, G. Piredda, C. Bünger, O. Grünberg, T. Hartmann, T. Leddig, C. Voß, R. Waldi, T. Adye, E.O. Olaiya, F.F. Wilson, S. Emery, G. Hamel De Monchenault, G. Vasseur, C. Yèche, F. Anulli, D. Aston, D.J. Bard, J.F. Benitez, C. Cartaro, M.R. Convery, J. Dorfan, G.P. Dubois-Felsmann, W. Dunwoodie, M. Ebert, R.C. Field, B.G. Fulsom, A.M. Gabareen, M.T. Graham, C. Hast, W.R. Innes, P. Kim, M.L. Kocian, D.W.G.S. Leith, P. Lewis, D. Lindemann, B. Lindquist, S. Luitz, V. Luth, H.L. Lynch, D.B. Macfarlane, D.R. Muller, H. Neal, S. Nelson, M. Perl, T. Pulliam, B.N. Ratcliff, A. Roodman, A.A. Salnikov, R.H. Schindler, A. Snyder, D. Su, M.K. Sullivan, J. Va'Vra, A.P. Wagner, W.F. Wang, W.J. Wisniewski, M. Wittgen, D.H. Wright, H.W. Wulsin, V. Ziegler, W. Park, M.V. Purohit, R.M. White, J.R. Wilson, A. Randle-Conde, S.J. Sekula, M. Bellis, P.R. Burchat, T.S. Miyashita, E.M.T. Puccio, M.S. Alam, J.A. Ernst, R. Gorodeisky, N. Guttman, D.R. Peimer, A. Soffer, S.M. Spanier, J.L. Ritchie, A.M. Ruland, R.F. Schwitters, B.C. Wray, J.M. Izen, X.C. Lou, F. Bianchi, F. De Mori, A. Filippi, D. Gamba, S. Zambito, L. Lanceri, L. Vitale, F. Martinez-Vidal, A. Oyanguren, P. Villanueva-Perez, J. Albert, S. Banerjee, F.U. Bernlochner, H.H.F. Choi, G.J. King, R. Kowalewski, M.J. Lewczuk, T. Lueck, I.M. Nugent, J.M. Roney, R.J. Sobie, N. Tasneem, T.J. Gershon, P.F. Harrison, T.E. Latham, H.R. Band, S. Dasu, Y. Pan, R. Prepost, S.L. Wu. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 90:9(2014 Nov 05), pp. 092001.1-092001.12. [10.1103/PhysRevD.90.092001]

Measurements of direct CP asymmetries in B →xsγ decays using sum of exclusive decays

J. P. Lees;V. Poireau;V. Tisserand;E. Grauges;A. Palano;G. Eigen;B. Stugu;D. N. Brown;L. T. Kerth;Y. G. Kolomensky;M. J. Lee;G. Lynch;H. Koch;T. Schroeder;C. Hearty;T. S. Mattison;J. A. Mckenna;R. Y. So;A. Khan;V. E. Blinov;A. R. Buzykaev;V. P. Druzhinin;V. B. Golubev;E. A. Kravchenko;A. P. Onuchin;S. I. Serednyakov;Y. I. Skovpen;E. P. Solodov;K. Y. Todyshev;A. N. Yushkov;D. Kirkby;A. J. Lankford;M. Mandelkern;B. Dey;J. W. Gary;O. Long;C. Campagnari;M. Franco Sevilla;T. M. Hong;D. Kovalskyi;J. D. Richman;C. A. West;A. M. Eisner;W. S. Lockman;B. A. Schumm;A. Seiden;D. S. Chao;C. H. Cheng;B. Echenard;K. T. Flood;D. G. Hitlin;P. Ongmongkolkul;F. C. Porter;R. Andreassen;Z. Huard;B. T. Meadows;B. G. Pushpawela;M. D. Sokoloff;L. Sun;P. C. Bloom;W. T. Ford;A. Gaz;U. Nauenberg;J. G. Smith;S. R. Wagner;R. Ayad;W. H. Toki;B. Spaan;R. Schwierz;D. Bernard;M. Verderi;S. Playfer;D. Bettoni;C. Bozzi;R. Calabrese;G. Cibinetto;E. Fioravanti;I. Garzia;E. Luppi;L. Piemontese;V. Santoro;R. Baldini Ferroli;A. Calcaterra;R. De Sangro;G. Finocchiaro;S. Martellotti;P. Patteri;I. M. Peruzzi;M. Piccolo;M. Rama;A. Zallo;R. Contri;E. Guido;M. Lo Vetere;M. R. Monge;S. Passaggio;C. Patrignani;E. Robutti;B. Bhuyan;V. Prasad;M. Morii;A. Adametz;U. Uwer;H. M. Lacker;P. D. Dauncey;U. Mallik;C. Chen;J. Cochran;W. T. Meyer;S. Prell;H. Ahmed;A. V. Gritsan;N. Arnaud;M. Davier;D. Derkach;G. Grosdidier;F. Le Diberder;A. M. Lutz;B. Malaescu;P. Roudeau;A. Stocchi;G. Wormser;D. J. Lange;D. M. Wright;J. P. Coleman;J. R. Fry;E. Gabathuler;D. E. Hutchcroft;D. J. Payne;C. Touramanis;A. J. Bevan;F. Di Lodovico;R. Sacco;G. Cowan;J. Bougher;D. N. Brown;C. L. Davis;A. G. Denig;M. Fritsch;W. Gradl;K. Griessinger;A. Hafner;E. Prencipe;K. R. Schubert;R. J. Barlow;G. D. Lafferty;E. Behn;R. Cenci;B. Hamilton;A. Jawahery;D. A. Roberts;R. Cowan;D. Dujmic;G. Sciolla;R. Cheaib;P. M. Patel;S. H. Robertson;P. Biassoni;N. Neri;F. Palombo;L. Cremaldi;R. Godang;P. Sonnek;D. J. Summers;M. Simard;P. Taras;G. De Nardo;D. Monorchio;G. Onorato;C. Sciacca;M. Martinelli;G. Raven;C. P. Jessop;J. M. Losecco;K. Honscheid;R. Kass;J. Brau;R. Frey;N. B. Sinev;D. Strom;E. Torrence;H. Ahmed;E. Feltresi;M. Margoni;M. Morandin;M. Posocco;M. Rotondo;G. Simi;F. Simonetto;R. Stroili;S. Akar;E. Ben Haim;M. Bomben;G. R. Bonneaud;H. Briand;G. Calderini;J. Chauveau;P. Leruste;G. Marchiori;J. Ocariz;S. Sitt;M. Biasini;E. Manoni;S. Pacetti;A. Rossi;C. Angelini;G. Batignani;S. Bettarini;M. Carpinelli;G. Casarosa;A. Cervelli;F. Forti;M. A. Giorgi;A. Lusiani;B. Oberhof;E. Paoloni;A. Perez;G. Rizzo;J. J. Walsh;D. Lopes Pegna;J. Olsen;A. J. S. Smith;R. Faccini;F. Ferrarotto;F. Ferroni;M. Gaspero;L. Li Gioi;G. Piredda;C. Bünger;O. Grünberg;T. Hartmann;T. Leddig;C. Voß;R. Waldi;T. Adye;E. O. Olaiya;F. F. Wilson;S. Emery;G. Hamel De Monchenault;G. Vasseur;C. Yèche;F. Anulli;D. Aston;D. J. Bard;J. F. Benitez;C. Cartaro;M. R. Convery;J. Dorfan;G. P. Dubois Felsmann;W. Dunwoodie;M. Ebert;R. C. Field;B. G. Fulsom;A. M. Gabareen;M. T. Graham;C. Hast;W. R. Innes;P. Kim;M. L. Kocian;D. W. G. S. Leith;P. Lewis;D. Lindemann;B. Lindquist;S. Luitz;V. Luth;H. L. Lynch;D. B. Macfarlane;D. R. Muller;H. Neal;S. Nelson;M. Perl;T. Pulliam;B. N. Ratcliff;A. Roodman;A. A. Salnikov;R. H. Schindler;A. Snyder;D. Su;M. K. Sullivan;J. Va'Vra;A. P. Wagner;W. F. Wang;W. J. Wisniewski;M. Wittgen;D. H. Wright;H. W. Wulsin;V. Ziegler;W. Park;M. V. Purohit;R. M. White;J. R. Wilson;A. Randle Conde;S. J. Sekula;M. Bellis;P. R. Burchat;T. S. Miyashita;E. M. T. Puccio;M. S. Alam;J. A. Ernst;R. Gorodeisky;N. Guttman;D. R. Peimer;A. Soffer;S. M. Spanier;J. L. Ritchie;A. M. Ruland;R. F. Schwitters;B. C. Wray;J. M. Izen;X. C. Lou;F. Bianchi;F. De Mori;A. Filippi;D. Gamba;S. Zambito;L. Lanceri;L. Vitale;F. Martinez Vidal;A. Oyanguren;P. Villanueva Perez;J. Albert;S. Banerjee;F. U. Bernlochner;H. H. F. Choi;G. J. King;R. Kowalewski;M. J. Lewczuk;T. Lueck;I. M. Nugent;J. M. Roney;R. J. Sobie;N. Tasneem;T. J. Gershon;P. F. Harrison;T. E. Latham;H. R. Band;S. Dasu;Y. Pan;R. Prepost;S. L. Wu

2014

Abstract

We measure the direct CP violation asymmetry, ACP, in B→Xsγ and the isospin difference of the asymmetry, ΔACP, using 429fb-1 of data collected at(4S) resonance with the BABAR detector at the PEP-II asymmetric-energy e+e- storage rings operating at the SLAC National Accelerator Laboratory. B mesons are reconstructed from ten charged B final states and six neutral B final states. We find ACP=+(1.7±1.9±1.0)%, which is in agreement with the Standard Model prediction and provides an improvement on the world average. Moreover, we report the first measurement of the difference between ACP for charged and neutral decay modes, ΔACP=+(5.0±3.9±1.5)%. Using the value of ΔACP, we also provide 68% and 90% confidence intervals on the imaginary part of the ratio of the Wilson coefficients corresponding to the chromomagnetic dipole and the electromagnetic dipole transitions.

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	Parole chiave
	
			BaBar detector; physics
		
	Settori scientifico-disciplinari dell'articolo
	
			Settore FIS/04 - Fisica Nucleare e Subnucleare
		
	Data di pubblicazione
	
			5-nov-2014
		
	Rivista in ANCE
	
			PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY
		
	DOI
	
			https://dx.doi.org/10.1103/PhysRevD.90.092001
		
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