Measurement of B (B -> Xs gamma), the B -> Xs gamma photon energy spectrum, and the direct CP asymmetry in B -> Xs+d gamma decays

Lees, J. P.; Poireau, V.; Tisserand, V.; Tico, J. G.; Grauges, E.; Palano, A.; Eigen, G.; Stugu, B.; Brown, D. N.; Kerth, L. T.; Kolomensky, Y. G.; Lynch, G.; Koch, H.; Schroeder, T.; Asgeirsson, D. J.; Hearty, C.; Mattison, T. S.; Mckenna, J. A.; R. Y., So; 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.; Bondioli, M.; Kirkby, D.; Lankford, A. J.; Mandelkern, M.; Atmacan, H.; Gary, J. W.; Liu, F.; Long, O.; Vitug, G. M.; Campagnari, C.; Hong, T. M.; Kovalskyi, D.; Richman, J. D.; West, C. A.; Eisner, A. M.; Kroseberg, J.; Lockman, W. S.; Martinez, A. J.; Schumm, B. A.; Seiden, A.; Winstrom, L.; Chao, D. S.; Cheng, C. H.; Echenard, B.; Flood, K. T.; Hitlin, D. G.; Ongmongkolkul, P.; Porter, F. C.; Rakitin, A. Y.; Andreassen, R.; Huard, Z.; Meadows, B. T.; 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.; Schubert, K. R.; Schwierz, R.; Bernard, D.; Verderi, M.; Clark, P. J.; Playfer, S.; Bettoni, D.; Bozzi, C.; Calabrese, R.; Cibinetto, G.; Fioravanti, E.; Garzia, I.; Luppi, E.; Muerato, M.; Piemontese, L.; Santoro, V.; Baldini Ferroli, R.; Calcaterra, A.; Sangro, R. D.; Finocchiaro, G.; Patteri, P.; Peruzzi, I. M.; Piccolo, M.; Rama, M.; Zallo, A.; Contri, R.; Guido, E.; Vetere, M. L.; Monge, M. R.; Passaggio, S.; Patrignani, C.; Robutti, E.; Bhuyan, B.; Prasad, V.; C. L., Le; Morii, M.; Edwards, A. J.; Adametz, A.; Uwer, U.; Lacker, H. M.; Lueck, T.; Dauncey, P. D.; Mallik, U.; Chen, C.; Cochran, J.; Meyer, W. T.; Prell, S.; Rubin, A. E.; Gritsan, A. V.; Guo, Z. J.; Arnaud, N.; Davier, M.; Derkach, D.; Grosdidier, G.; Diberder, F. L.; Lutz, A. M.; Malaescu, B.; Roudeau, P.; Schune, M. H.; Stocchi, A.; Wormser, G.; Lange, D. J.; Wright, D. M.; Chavez, C. A.; Coleman, J. P.; Fry, J. R.; Gabathuler, E.; Hutchcroft, D. E.; Payne, D. J.; Touramanis, C.; Bevan, A. J.; Lodovico, F. D.; Sacco, R.; Sigamani, M.; Cowan, G.; Brown, D. N.; Davis, C. L.; Denig, A. G.; Fritsch, M.; Gradl, W.; Griessinger, K.; Hafner, A.; Prencipe, E.; Barlow, R. J.; Jackson, G.; Lafferty, G. D.; Behn, E.; Cenci, R.; Hamilton, B.; Jawahery, A.; Roberts, D. A.; Dallapiccola, C.; Cowan, R.; Dujmic, D.; Sciolla, G.; Cheaib, R.; Lindemann, D.; Patel, P. M.; Robertson, S. H.; Biassoni, P.; Neri, N.; Palombo, F.; Stracka, S.; Cremaldi, L.; Godang, R.; Kroeger, R.; Sonnek, P.; Summers, D. J.; Nguyen, X.; Simard, M.; Taras, P.; Nardo, G. D.; Monorchio, D.; Onorato, G.; Sciacca, C.; Martinelli, M.; Raven, G.; Jessop, C. P.; Knoepfel, K.; Losecco, J. M.; Wang, W. F.; Honscheid, K.; Kass, R.; Brau, J.; Frey, R.; Lu, M.; Sinev, N. B.; Strom, D.; Torrence, E.; Feltresi, E.; Gagliardi, N.; 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.; Hamon, O.; 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.; Pegna, D. L.; Olsen, J.; Telnov, A. V.; Anulli, F.; Faccini, Riccardo; Ferrarotto, F.; Ferroni, Fernando; Gaspero, M.; Gioi, L. L.; Mazzoni, M. A.; Piredda, G.; Bunger, C.; Grunberg, O.; Hartmann, T.; Leddig, T.; Schroder, H.; Voss, C.; Waldi, R.; Adye, T.; Olaiya, E. O.; Wilson, F. F.; Emery, S.; G. H., De; Vasseur, G.; Yeche, C.; Aston, D.; Bard, D. J.; Bartoldus, R.; Bechtle, P.; Benitez, J. F.; Cartaro, C.; Convery, M. R.; Dorfan, J.; Dubois Felsmann, G. P.; Dunwoodie, W.; Ebert, M.; Field, R. C.; Sevilla, M. F.; Fulsom, B. G.; Gabareen, A. M.; Graham, M. T.; Grenier, P.; Hast, C.; Innes, W. R.; Kelsey, M. H.; Kim, P.; Kocian, M. L.; Lewis, P.; 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.; Wisniewski, W. J.; Wittgen, M.; Wright, D. H.; Wulsin, H. W.; Young, C. C.; 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.; Alam, M. S.; Ernst, J. A.; Gorodeisky, R.; Guttman, N.; Peimer, D. R.; Soffer, A.; Lund, P.; Spanier, S. M.; Ritchie, J. L.; Ruland, A. M.; Schwitters, R. F.; Wray, B. C.; Izen, J. M.; Lou, X. C.; Bianchi, F.; Gamba, D.; Zambito, S.; Lanceri, L.; Vitale, L.; Martinez Vidal, F.; Oyanguren, A.; Ahmed, H.; Albert, J.; Banerjee, S.; Bernlochner, F. U.; King, G. J.; Kowalewski, R.; Lewczuk, M. J.; 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., Wu

doi:10.1103/physrevd.86.112008

The photon spectrum in B -> X-s gamma decay, where X-s is any strange hadronic state, is studied using a data sample of (382.8 +/- 4.2) x 10(6) e(+)e(-) -> Upsilon(4S) -> B (B) over bar events collected by the BABAR experiment at the PEP-II collider. The spectrum is used to measure the branching fraction B(B -> X-s gamma) (3.21 +/- 0.15 +/- 0.29 +/- 0.08) x 10(-4) and the first, second, and third moments < E-gamma > = 2.267 +/- 0.019 +/- 0.032 +/- 0.003 GeV, <(E-gamma - < E-gamma >)(2)> = 0.0484 +/- 0.0053 +/- 0.0077 +/- 0.0005 GeV2, and <(E-gamma - < E-gamma)(3)> = -0.0048 +/- 0.0011 +/- 0.0011 +/- 0.0004 GeV3, for the range E-gamma > 1.8 GeV, where E-gamma is the photon energy in the B-meson rest frame. Results are also presented for narrower E-gamma ranges. In addition, the direct CP asymmetry A(CP)(B -> Xs+d gamma) is measured to be 0.057 +/- 0.063. The spectrum itself is also unfolded to the B-meson rest frame; that is the frame in which theoretical predictions for its shape are made. DOI: 10.1103/PhysRevD.86.112008

Measurement of B (B -> Xs gamma), the B -> Xs gamma photon energy spectrum, and the direct CP asymmetry in B -> Xs+d gamma decays / J. P., L., V., P., V., T., J. G., T., E., G., A., P., G., E., B., S., D. N., B., L. T., K., Y. G., K., G., L., H., K., T., S., D. J., A., C., H., T. S., M., J. A., M., R. Y., S.o., A., K., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 86:11(2012), p. 112008. [10.1103/physrevd.86.112008]

Measurement of B (B -> Xs gamma), the B -> Xs gamma photon energy spectrum, and the direct CP asymmetry in B -> Xs+d gamma decays

J. P. Lees;V. Poireau;V. Tisserand;J. G. Tico;E. Grauges;A. Palano;G. Eigen;B. Stugu;D. N. Brown;L. T. Kerth;Y. G. Kolomensky;G. Lynch;H. Koch;T. Schroeder;D. J. Asgeirsson;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;M. Bondioli;D. Kirkby;A. J. Lankford;M. Mandelkern;H. Atmacan;J. W. Gary;F. Liu;O. Long;G. M. Vitug;C. Campagnari;T. M. Hong;D. Kovalskyi;J. D. Richman;C. A. West;A. M. Eisner;J. Kroseberg;W. S. Lockman;A. J. Martinez;B. A. Schumm;A. Seiden;L. Winstrom;D. S. Chao;C. H. Cheng;B. Echenard;K. T. Flood;D. G. Hitlin;P. Ongmongkolkul;F. C. Porter;A. Y. Rakitin;R. Andreassen;Z. Huard;B. T. Meadows;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;K. R. Schubert;R. Schwierz;D. Bernard;M. Verderi;P. J. Clark;S. Playfer;D. Bettoni;C. Bozzi;R. Calabrese;G. Cibinetto;E. Fioravanti;I. Garzia;E. Luppi;M. Muerato;L. Piemontese;V. Santoro;R. Baldini Ferroli;A. Calcaterra;R. D. Sangro;G. Finocchiaro;P. Patteri;I. M. Peruzzi;M. Piccolo;M. Rama;A. Zallo;R. Contri;E. Guido;M. L. Vetere;M. R. Monge;S. Passaggio;C. Patrignani;E. Robutti;B. Bhuyan;V. Prasad;C. L. Le;M. Morii;A. J. Edwards;A. Adametz;U. Uwer;H. M. Lacker;T. Lueck;P. D. Dauncey;U. Mallik;C. Chen;J. Cochran;W. T. Meyer;S. Prell;A. E. Rubin;A. V. Gritsan;Z. J. Guo;N. Arnaud;M. Davier;D. Derkach;G. Grosdidier;F. L. Diberder;A. M. Lutz;B. Malaescu;P. Roudeau;M. H. Schune;A. Stocchi;G. Wormser;D. J. Lange;D. M. Wright;C. A. Chavez;J. P. Coleman;J. R. Fry;E. Gabathuler;D. E. Hutchcroft;D. J. Payne;C. Touramanis;A. J. Bevan;F. D. Lodovico;R. Sacco;M. Sigamani;G. Cowan;D. N. Brown;C. L. Davis;A. G. Denig;M. Fritsch;W. Gradl;K. Griessinger;A. Hafner;E. Prencipe;R. J. Barlow;G. Jackson;G. D. Lafferty;E. Behn;R. Cenci;B. Hamilton;A. Jawahery;D. A. Roberts;C. Dallapiccola;R. Cowan;D. Dujmic;G. Sciolla;R. Cheaib;D. Lindemann;P. M. Patel;S. H. Robertson;P. Biassoni;N. Neri;F. Palombo;S. Stracka;L. Cremaldi;R. Godang;R. Kroeger;P. Sonnek;D. J. Summers;X. Nguyen;M. Simard;P. Taras;G. D. Nardo;D. Monorchio;G. Onorato;C. Sciacca;M. Martinelli;G. Raven;C. P. Jessop;K. Knoepfel;J. M. Losecco;W. F. Wang;K. Honscheid;R. Kass;J. Brau;R. Frey;M. Lu;N. B. Sinev;D. Strom;E. Torrence;E. Feltresi;N. Gagliardi;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;O. Hamon;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. L. Pegna;J. Olsen;A. V. Telnov;F. Anulli;FACCINI, Riccardo;F. Ferrarotto;FERRONI, Fernando;M. Gaspero;L. L. Gioi;M. A. Mazzoni;G. Piredda;C. Bunger;O. Grunberg;T. Hartmann;T. Leddig;H. Schroder;C. Voss;R. Waldi;T. Adye;E. O. Olaiya;F. F. Wilson;S. Emery;G. H. De;G. Vasseur;C. Yeche;D. Aston;D. J. Bard;R. Bartoldus;P. Bechtle;J. F. Benitez;C. Cartaro;M. R. Convery;J. Dorfan;G. P. Dubois Felsmann;W. Dunwoodie;M. Ebert;R. C. Field;M. F. Sevilla;B. G. Fulsom;A. M. Gabareen;M. T. Graham;P. Grenier;C. Hast;W. R. Innes;M. H. Kelsey;P. Kim;M. L. Kocian;P. Lewis;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. J. Wisniewski;M. Wittgen;D. H. Wright;H. W. Wulsin;C. C. Young;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;M. S. Alam;J. A. Ernst;R. Gorodeisky;N. Guttman;D. R. Peimer;A. Soffer;P. Lund;S. M. Spanier;J. L. Ritchie;A. M. Ruland;R. F. Schwitters;B. C. Wray;J. M. Izen;X. C. Lou;F. Bianchi;D. Gamba;S. Zambito;L. Lanceri;L. Vitale;F. Martinez Vidal;A. Oyanguren;H. Ahmed;J. Albert;S. Banerjee;F. U. Bernlochner;G. J. King;R. Kowalewski;M. J. Lewczuk;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

2012

Abstract

The photon spectrum in B -> X-s gamma decay, where X-s is any strange hadronic state, is studied using a data sample of (382.8 +/- 4.2) x 10(6) e(+)e(-) -> Upsilon(4S) -> B (B) over bar events collected by the BABAR experiment at the PEP-II collider. The spectrum is used to measure the branching fraction B(B -> X-s gamma) (3.21 +/- 0.15 +/- 0.29 +/- 0.08) x 10(-4) and the first, second, and third moments < E-gamma > = 2.267 +/- 0.019 +/- 0.032 +/- 0.003 GeV, <(E-gamma - < E-gamma >)(2)> = 0.0484 +/- 0.0053 +/- 0.0077 +/- 0.0005 GeV2, and <(E-gamma - < E-gamma)(3)> = -0.0048 +/- 0.0011 +/- 0.0011 +/- 0.0004 GeV3, for the range E-gamma > 1.8 GeV, where E-gamma is the photon energy in the B-meson rest frame. Results are also presented for narrower E-gamma ranges. In addition, the direct CP asymmetry A(CP)(B -> Xs+d gamma) is measured to be 0.057 +/- 0.063. The spectrum itself is also unfolded to the B-meson rest frame; that is the frame in which theoretical predictions for its shape are made. DOI: 10.1103/PhysRevD.86.112008

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				2012
			
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				01 Pubblicazione su rivista::01a Articolo in rivista
			
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				Measurement of B (B -> Xs gamma), the B -> Xs gamma photon energy spectrum, and the direct CP asymmetry in B -> Xs+d gamma decays / J. P., L., V., P., V., T., J. G., T., E., G., A., P., G., E., B., S., D. N., B., L. T., K., Y. G., K., G., L., H., K., T., S., D. J., A., C., H., T. S., M., J. A., M., R. Y., S.o., A., K., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 86:11(2012), p. 112008. [10.1103/physrevd.86.112008]
			
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				01a Articolo in rivista

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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/519146

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