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Aubert B, Bona M, Karyotakis Y, et al. Observation of the bottomonium ground state in the decay Upsilon(3S)-->gammaetab. Phys Rev Lett. 2008;101(7):071801doi: 10.1103/PhysRevLett.101.071801.
Aubert, B., Bona, M., Karyotakis, Y., Lees, J. P., Poireau, V., Prencipe, E., Prudent, X., Tisserand, V., Garra Tico, J., Grauges, E., Lopez, L., Palano, A., Pappagallo, M., Eigen, G., Stugu, B., Sun, L., Abrams, G. S., Battaglia, M., Brown, D. N., Cahn, R. N., Jacobsen, R. G., Kerth, L. T., Kolomensky, Y. G., Lynch, G., Osipenkov, I. L., Ronan, M. T., Tackmann, K., Tanabe, T., Hawkes, C. M., Soni, N., Watson, A. T., Koch, H., Schroeder, T., Walker, D., Asgeirsson, D. J., Fulsom, B. G., Hearty, C., Mattison, T. S., McKenna, J. A., Barrett, M., Khan, A., Blinov, V. E., Bukin, A. D., Buzykaev, A. R., Druzhinin, V. P., Golubev, V. B., Onuchin, A. P., Serednyakov, S. I., Skovpen, Y. I., Solodov, E. P., Todyshev, K. Y., Bondioli, M., Curry, S., Eschrich, I., Kirkby, D., Lankford, A. J., Lund, P., Mandelkern, M., Martin, E. C., Stoker, D. P., Abachi, S., Buchanan, C., Gary, J. W., Liu, F., Long, O., Shen, B. C., Vitug, G. M., Yasin, Z., Zhang, L., Sharma, V., Campagnari, C., Hong, T. M., Kovalskyi, D., Mazur, M. A., Richman, J. D., Beck, T. W., Eisner, A. M., Flacco, C. J., Heusch, C. A., Kroseberg, J., Lockman, W. S., Martinez, A. J., Schalk, T., Schumm, B. A., Seiden, A., Wilson, M. G., Winstrom, L. O., Cheng, C. H., Doll, D. A., Echenard, B., Fang, F., Hitlin, D. G., Narsky, I., Piatenko, T., Porter, F. C., Andreassen, R., Mancinelli, G., Meadows, B. T., Mishra, K., Sokoloff, M. D., Bloom, P. C., Ford, W. T., Gaz, A., Hirschauer, J. F., Nagel, M., Nauenberg, U., Smith, J. G., Ulmer, K. A., Wagner, S. R., Ayad, R., Soffer, A., Toki, W. H., Wilson, R. J., Altenburg, D. D., Feltresi, E., Hauke, A., Jasper, H., Karbach, M., Merkel, J., Petzold, A., Spaan, B., Wacker, K., Kobel, M. J., Mader, W. F., Nogowski, R., Schubert, K. R., Schwierz, R., Volk, A., Bernard, D., Bonneaud, G. R., Latour, E., Verderi, M., Clark, P. J., Playfer, S., Watson, J. E., Andreotti, M., Bettoni, D., Bozzi, C., Calabrese, R., Cecchi, A., Cibinetto, G., Franchini, P., Luppi, E., Negrini, M., Petrella, A., Piemontese, L., Santoro, V., Baldini-Ferroli, R., Calcaterra, A., de Sangro, R., Finocchiaro, G., Pacetti, S., Patteri, P., Peruzzi, I. M., Piccolo, M., Rama, M., Zallo, A., Buzzo, A., Contri, R., Lo Vetere, M., Macri, M. M., Monge, M. R., Passaggio, S., Patrignani, C., Robutti, E., Santroni, A., Tosi, S., Chaisanguanthum, K. S., Morii, M., Adametz, A., Marks, J., Schenk, S., Uwer, U., Klose, V., Lacker, H. M., Bard, D. J., Dauncey, P. D., Nash, J. A., Tibbetts, M., Behera, P. K., Chai, X., Charles, M. J., Mallik, U., Cochran, J., Crawley, H. B., Dong, L., Meyer, W. T., Prell, S., Rosenberg, E. I., Rubin, A. E., Gao, Y. Y., Gritsan, A. V., Guo, Z. J., Lae, C. K., Arnaud, N., Béquilleux, J., D'Orazio, A., Davier, M., da Costa, J. F., Grosdidier, G., Höcker, A., Lepeltier, V., Le Diberder, F., Lutz, A. M., Pruvot, S., Roudeau, P., Schune, M. H., Serrano, J., Sordini, V., Stocchi, A., Wormser, G., Lange, D. J., Wright, D. M., Bingham, I., Burke, J. P., Chavez, C. A., Fry, J. R., Gabathuler, E., Gamet, R., Hutchcroft, D. E., Payne, D. J., Touramanis, C., Bevan, A. J., Clarke, C. K., George, K. A., Di Lodovico, F., Sacco, R., Sigamani, M., Cowan, G., Flaecher, H. U., Hopkins, D. A., Paramesvaran, S., Salvatore, F., Wren, A. C., Brown, D. N., Davis, C. L., Denig, A. G., Fritsch, M., Gradl, W., Schott, G., Alwyn, K. E., Bailey, D., Barlow, R. J., Chia, Y. M., Edgar, C. L., Jackson, G., Lafferty, G. D., West, T. J., Yi, J. I., Anderson, J., Chen, C., Jawahery, A., Roberts, D. A., Simi, G., Tuggle, J. M., Dallapiccola, C., Li, X., Salvati, E., Saremi, S., Cowan, R., Dujmic, D., Fisher, P. H., Sciolla, G., Spitznagel, M., Taylor, F., Yamamoto, R. K., Zhao, M., Patel, P. M., Robertson, S. H., Lazzaro, A., Lombardo, V., Palombo, F., Bauer, J. M., Cremaldi, L., Godang, R., Kroeger, R., Sanders, D. A., Summers, D. J., Zhao, H. W., Simard, M., Taras, P., Viaud, F. B., Nicholson, H., De Nardo, G., Lista, L., Monorchio, D., Onorato, G., Sciacca, C., Raven, G., Snoek, H. L., Jessop, C. P., Knoepfel, K. J., LoSecco, J. M., Wang, W. F., Benelli, G., Corwin, L. A., Honscheid, K., Kagan, H., Kass, R., Morris, J. P., Rahimi, A. M., Regensburger, J. J., Sekula, S. J., Wong, Q. K., Blount, N. L., Brau, J., Frey, R., Igonkina, O., Kolb, J. A., Lu, M., Rahmat, R., Sinev, N. B., Strom, D., Strube, J., Torrence, E., Castelli, G., Gagliardi, N., Margoni, M., Morandin, M., Posocco, M., Rotondo, M., Simonetto, F., Stroili, R., Voci, C., del Amo Sanchez, P., Ben-Haim, E., Briand, H., Calderini, G., Chauveau, J., David, P., Del Buono, L., Hamon, O., Leruste, P., Ocariz, J., Perez, A., Prendki, J., Sitt, S., Gladney, L., Biasini, M., Covarelli, R., Manoni, E., Angelini, C., Batignani, G., Bettarini, S., Carpinelli, M., Cervelli, A., Forti, F., Giorgi, M. A., Lusiani, A., Marchiori, G., Morganti, M., Neri, N., Paoloni, E., Rizzo, G., Walsh, J. J., Lopes Pegna, D., Lu, C., Olsen, J., Smith, A. J., Telnov, A. V., Anulli, F., Baracchini, E., Cavoto, G., del Re, D., Di Marco, E., Faccini, R., Ferrarotto, F., Ferroni, F., Gaspero, M., Jackson, P. D., Gioi, L. L., Mazzoni, M. A., Morganti, S., Piredda, G., Polci, F., Renga, F., Voena, C., Ebert, M., Hartmann, T., Schröder, H., Waldi, R., Adye, T., Franek, B., Olaiya, E. O., Wilson, F. F., Emery, S., Escalier, M., Esteve, L., Ganzhur, S. F., de Monchenault, G. H., Kozanecki, W., Vasseur, G., Yèche, C. h., Zito, M., Chen, X. R., Liu, H., Park, W., Purohit, M. V., White, R. M., Wilson, J. R., Allen, M. T., Aston, D., Bartoldus, R., Bechtle, P., Benitez, J. F., Bertsche, K., Cai, Y., Cenci, R., Coleman, J. P., Convery, M. R., Decker, F. J., Dingfelder, J. C., Dorfan, J., Dubois-Felsmann, G. P., Dunwoodie, W., Ecklund, S., Erickson, R., Field, R. C., Fisher, A., Fox, J., Gabareen, A. M., Gowdy, S. J., Graham, M. T., Grenier, P., Hast, C., Innes, W. R., Iverson, R., Kaminski, J., Kelsey, M. H., Kim, H., Kim, P., Kocian, M. L., Kulikov, A., Leith, D. W., Li, S., Lindquist, B., Luitz, S., Luth, V., Lynch, H. L., Macfarlane, D. B., Marsiske, H., Messner, R., Muller, D. R., Neal, H., Nelson, S., Novokhatski, A., O'Grady, C. P., Ofte, I., Perazzo, A., Perl, M., Ratcliff, B. N., Rivetta, C., Roodman, A., Salnikov, A. A., Schindler, R. H., Schwiening, J., Seeman, J., Snyder, A., Su, D., Sullivan, M. K., Suzuki, K., Swain, S. K., Thompson, J. M., Va'vra, J., Van Winkle, D., Wagner, A. P., Weaver, M., West, C. A., Wienands, U., Wisniewski, W. J., Wittgen, M., Wittmer, W., Wright, D. H., Wulsin, H. W., Yan, Y., Yarritu, A. K., Yi, K., Yocky, G., Young, C. C., Ziegler, V., Burchat, P. R., Edwards, A. J., Majewski, S. A., Miyashita, T. S., Petersen, B. A., Wilden, L., Ahmed, S., Alam, M. S., Ernst, J. A., Pan, B., Saeed, M. A., Zain, S. B., Spanier, S. M., Wogsland, B. J., Eckmann, R., Ritchie, J. L., Ruland, A. M., Schilling, C. J., Schwitters, R. F., Drummond, B. W., Izen, J. M., Lou, X. C., Bianchi, F., Gamba, D., Pelliccioni, M., Bomben, M., Bosisio, L., Cartaro, C., Della Ricca, G., Lanceri, L., Vitale, L., Azzolini, V., Lopez-March, N., Martinez-Vidal, F., Milanes, D. A., Oyanguren, A., Albert, J., Banerjee, S., Bhuyan, B., Choi, H. H., Hamano, K., Kowalewski, R., Lewczuk, M. J., Nugent, I. M., Roney, J. M., Sobie, R. J., Gershon, T. J., Harrison, P. F., Ilic, J., Latham, T. E., Mohanty, G. B., Band, H. R., Chen, X., Dasu, S., Flood, K. T., Pan, Y., Pierini, M., Prepost, R., Vuosalo, C. O., Wu, S. L. (2008). Observation of the bottomonium ground state in the decay Upsilon(3S)-->gammaetab. Physical review letters, 101(7), 071801. https://doi.org/10.1103/PhysRevLett.101.071801
Aubert, B, et al. "Observation of the bottomonium ground state in the decay Upsilon(3S)-->gammaetab." Physical review letters vol. 101,7 (2008): 071801. doi: https://doi.org/10.1103/PhysRevLett.101.071801
Aubert B, Bona M, Karyotakis Y, Lees JP, Poireau V, Prencipe E, Prudent X, Tisserand V, Garra Tico J, Grauges E, Lopez L, Palano A, Pappagallo M, Eigen G, Stugu B, Sun L, Abrams GS, Battaglia M, Brown DN, Cahn RN, Jacobsen RG, Kerth LT, Kolomensky YG, Lynch G, Osipenkov IL, Ronan MT, Tackmann K, Tanabe T, Hawkes CM, Soni N, Watson AT, Koch H, Schroeder T, Walker D, Asgeirsson DJ, Fulsom BG, Hearty C, Mattison TS, McKenna JA, Barrett M, Khan A, Blinov VE, Bukin AD, Buzykaev AR, Druzhinin VP, Golubev VB, Onuchin AP, Serednyakov SI, Skovpen YI, Solodov EP, Todyshev KY, Bondioli M, Curry S, Eschrich I, Kirkby D, Lankford AJ, Lund P, Mandelkern M, Martin EC, Stoker DP, Abachi S, Buchanan C, Gary JW, Liu F, Long O, Shen BC, Vitug GM, Yasin Z, Zhang L, Sharma V, Campagnari C, Hong TM, Kovalskyi D, Mazur MA, Richman JD, Beck TW, Eisner AM, Flacco CJ, Heusch CA, Kroseberg J, Lockman WS, Martinez AJ, Schalk T, Schumm BA, Seiden A, Wilson MG, Winstrom LO, Cheng CH, Doll DA, Echenard B, Fang F, Hitlin DG, Narsky I, Piatenko T, Porter FC, Andreassen R, Mancinelli G, Meadows BT, Mishra K, Sokoloff MD, Bloom PC, Ford WT, Gaz A, Hirschauer JF, Nagel M, Nauenberg U, Smith JG, Ulmer KA, Wagner SR, Ayad R, Soffer A, Toki WH, Wilson RJ, Altenburg DD, Feltresi E, Hauke A, Jasper H, Karbach M, Merkel J, Petzold A, Spaan B, Wacker K, Kobel MJ, Mader WF, Nogowski R, Schubert KR, Schwierz R, Volk A, Bernard D, Bonneaud GR, Latour E, Verderi M, Clark PJ, Playfer S, Watson JE, Andreotti M, Bettoni D, Bozzi C, Calabrese R, Cecchi A, Cibinetto G, Franchini P, Luppi E, Negrini M, Petrella A, Piemontese L, Santoro V, Baldini-Ferroli R, Calcaterra A, de Sangro R, Finocchiaro G, Pacetti S, Patteri P, Peruzzi IM, Piccolo M, Rama M, Zallo A, Buzzo A, Contri R, Lo Vetere M, Macri MM, Monge MR, Passaggio S, Patrignani C, Robutti E, Santroni A, Tosi S, Chaisanguanthum KS, Morii M, Adametz A, Marks J, Schenk S, Uwer U, Klose V, Lacker HM, Bard DJ, Dauncey PD, Nash JA, Tibbetts M, Behera PK, Chai X, Charles MJ, Mallik U, Cochran J, Crawley HB, Dong L, Meyer WT, Prell S, Rosenberg EI, Rubin AE, Gao YY, Gritsan AV, Guo ZJ, Lae CK, Arnaud N, Béquilleux J, D'Orazio A, Davier M, da Costa JF, Grosdidier G, Höcker A, Lepeltier V, Le Diberder F, Lutz AM, Pruvot S, Roudeau P, Schune MH, Serrano J, Sordini V, Stocchi A, Wormser G, Lange DJ, Wright DM, Bingham I, Burke JP, Chavez CA, Fry JR, Gabathuler E, Gamet R, Hutchcroft DE, Payne DJ, Touramanis C, Bevan AJ, Clarke CK, George KA, Di Lodovico F, Sacco R, Sigamani M, Cowan G, Flaecher HU, Hopkins DA, Paramesvaran S, Salvatore F, Wren AC, Brown DN, Davis CL, Denig AG, Fritsch M, Gradl W, Schott G, Alwyn KE, Bailey D, Barlow RJ, Chia YM, Edgar CL, Jackson G, Lafferty GD, West TJ, Yi JI, Anderson J, Chen C, Jawahery A, Roberts DA, Simi G, Tuggle JM, Dallapiccola C, Li X, Salvati E, Saremi S, Cowan R, Dujmic D, Fisher PH, Sciolla G, Spitznagel M, Taylor F, Yamamoto RK, Zhao M, Patel PM, Robertson SH, Lazzaro A, Lombardo V, Palombo F, Bauer JM, Cremaldi L, Godang R, Kroeger R, Sanders DA, Summers DJ, Zhao HW, Simard M, Taras P, Viaud FB, Nicholson H, De Nardo G, Lista L, Monorchio D, Onorato G, Sciacca C, Raven G, Snoek HL, Jessop CP, Knoepfel KJ, LoSecco JM, Wang WF, Benelli G, Corwin LA, Honscheid K, Kagan H, Kass R, Morris JP, Rahimi AM, Regensburger JJ, Sekula SJ, Wong QK, Blount NL, Brau J, Frey R, Igonkina O, Kolb JA, Lu M, Rahmat R, Sinev NB, Strom D, Strube J, Torrence E, Castelli G, Gagliardi N, Margoni M, Morandin M, Posocco M, Rotondo M, Simonetto F, Stroili R, Voci C, del Amo Sanchez P, Ben-Haim E, Briand H, Calderini G, Chauveau J, David P, Del Buono L, Hamon O, Leruste P, Ocariz J, Perez A, Prendki J, Sitt S, Gladney L, Biasini M, Covarelli R, Manoni E, Angelini C, Batignani G, Bettarini S, Carpinelli M, Cervelli A, Forti F, Giorgi MA, Lusiani A, Marchiori G, Morganti M, Neri N, Paoloni E, Rizzo G, Walsh JJ, Lopes Pegna D, Lu C, Olsen J, Smith AJ, Telnov AV, Anulli F, Baracchini E, Cavoto G, del Re D, Di Marco E, Faccini R, Ferrarotto F, Ferroni F, Gaspero M, Jackson PD, Gioi LL, Mazzoni MA, Morganti S, Piredda G, Polci F, Renga F, Voena C, Ebert M, Hartmann T, Schröder H, Waldi R, Adye T, Franek B, Olaiya EO, Wilson FF, Emery S, Escalier M, Esteve L, Ganzhur SF, de Monchenault GH, Kozanecki W, Vasseur G, Yèche Ch, Zito M, Chen XR, Liu H, Park W, Purohit MV, White RM, Wilson JR, Allen MT, Aston D, Bartoldus R, Bechtle P, Benitez JF, Bertsche K, Cai Y, Cenci R, Coleman JP, Convery MR, Decker FJ, Dingfelder JC, Dorfan J, Dubois-Felsmann GP, Dunwoodie W, Ecklund S, Erickson R, Field RC, Fisher A, Fox J, Gabareen AM, Gowdy SJ, Graham MT, Grenier P, Hast C, Innes WR, Iverson R, Kaminski J, Kelsey MH, Kim H, Kim P, Kocian ML, Kulikov A, Leith DW, Li S, Lindquist B, Luitz S, Luth V, Lynch HL, Macfarlane DB, Marsiske H, Messner R, Muller DR, Neal H, Nelson S, Novokhatski A, O'Grady CP, Ofte I, Perazzo A, Perl M, Ratcliff BN, Rivetta C, Roodman A, Salnikov AA, Schindler RH, Schwiening J, Seeman J, Snyder A, Su D, Sullivan MK, Suzuki K, Swain SK, Thompson JM, Va'vra J, Van Winkle D, Wagner AP, Weaver M, West CA, Wienands U, Wisniewski WJ, Wittgen M, Wittmer W, Wright DH, Wulsin HW, Yan Y, Yarritu AK, Yi K, Yocky G, Young CC, Ziegler V, Burchat PR, Edwards AJ, Majewski SA, Miyashita TS, Petersen BA, Wilden L, Ahmed S, Alam MS, Ernst JA, Pan B, Saeed MA, Zain SB, Spanier SM, Wogsland BJ, Eckmann R, Ritchie JL, Ruland AM, Schilling CJ, Schwitters RF, Drummond BW, Izen JM, Lou XC, Bianchi F, Gamba D, Pelliccioni M, Bomben M, Bosisio L, Cartaro C, Della Ricca G, Lanceri L, Vitale L, Azzolini V, Lopez-March N, Martinez-Vidal F, Milanes DA, Oyanguren A, Albert J, Banerjee S, Bhuyan B, Choi HH, Hamano K, Kowalewski R, Lewczuk MJ, Nugent IM, Roney JM, Sobie RJ, Gershon TJ, Harrison PF, Ilic J, Latham TE, Mohanty GB, Band HR, Chen X, Dasu S, Flood KT, Pan Y, Pierini M, Prepost R, Vuosalo CO, Wu SL. Observation of the bottomonium ground state in the decay Upsilon(3S)-->gammaetab. Phys Rev Lett. 2008 Aug 15;101(7):071801. doi: 10.1103/PhysRevLett.101.071801. Epub 2008 Aug 11. PMID: 18764521.
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Phys Rev Lett. 2008 Aug 15;101(7):071801. doi: 10.1103/PhysRevLett.101.071801. Epub 2008 Aug 11.

Observation of the bottomonium ground state in the decay Upsilon(3S)-->gammaetab.

Physical review letters

B Aubert, M Bona, Y Karyotakis, J P 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, G S Abrams, M Battaglia, D N Brown, R N Cahn, R G Jacobsen, L T Kerth, Yu G Kolomensky, G Lynch, I L Osipenkov, M T Ronan, K Tackmann, T Tanabe, C M Hawkes, N Soni, A T Watson, H Koch, T Schroeder, D Walker, D J Asgeirsson, B G Fulsom, C Hearty, T S Mattison, J A McKenna, M Barrett, A Khan, V E Blinov, A D Bukin, A R Buzykaev, V P Druzhinin, V B Golubev, A P Onuchin, S I Serednyakov, Yu I Skovpen, E P Solodov, K Yu Todyshev, M Bondioli, S Curry, I Eschrich, D Kirkby, A J Lankford, P Lund, M Mandelkern, E C Martin, D P Stoker, S Abachi, C Buchanan, J W Gary, F Liu, O Long, B C Shen, G M Vitug, Z Yasin, L Zhang, V Sharma, C Campagnari, T M Hong, D Kovalskyi, M A Mazur, J D Richman, T W Beck, A M Eisner, C J Flacco, C A Heusch, J Kroseberg, W S Lockman, A J Martinez, T Schalk, B A Schumm, A Seiden, M G Wilson, L O Winstrom, C H Cheng, D A Doll, B Echenard, F Fang, D G Hitlin, I Narsky, T Piatenko, F C Porter, R Andreassen, G Mancinelli, B T Meadows, K Mishra, M D Sokoloff, P C Bloom, W T Ford, A Gaz, J F Hirschauer, M Nagel, U Nauenberg, J G Smith, K A Ulmer, S R Wagner, R Ayad, A Soffer, W H Toki, R J Wilson, D D Altenburg, E Feltresi, A Hauke, H Jasper, M Karbach, J Merkel, A Petzold, B Spaan, K Wacker, M J Kobel, W F Mader, R Nogowski, K R Schubert, R Schwierz, A Volk, D Bernard, G R Bonneaud, E Latour, M Verderi, P J Clark, S Playfer, J E Watson, M Andreotti, D Bettoni, C Bozzi, R Calabrese, A Cecchi, G Cibinetto, P Franchini, E Luppi, M Negrini, A Petrella, L Piemontese, V Santoro, R Baldini-Ferroli, A Calcaterra, R de Sangro, G Finocchiaro, S Pacetti, P Patteri, I M Peruzzi, M Piccolo, M Rama, A Zallo, A Buzzo, R Contri, M Lo Vetere, M M Macri, M R Monge, S Passaggio, C Patrignani, E Robutti, A Santroni, S Tosi, K S Chaisanguanthum, M Morii, A Adametz, J Marks, S Schenk, U Uwer, V Klose, H M Lacker, D J Bard, P D Dauncey, J A Nash, M Tibbetts, P K Behera, X Chai, M J Charles, U Mallik, J Cochran, H B Crawley, L Dong, W T Meyer, S Prell, E I Rosenberg, A E Rubin, Y Y Gao, A V Gritsan, Z J Guo, C K Lae, N Arnaud, J Béquilleux, A D'Orazio, M Davier, J Firmino da Costa, G Grosdidier, A Höcker, V Lepeltier, F Le Diberder, A M Lutz, S Pruvot, P Roudeau, M H Schune, J Serrano, V Sordini, A Stocchi, G Wormser, D J Lange, D M Wright, I Bingham, J P Burke, C A Chavez, J R Fry, E Gabathuler, R Gamet, D E Hutchcroft, D J Payne, C Touramanis, A J Bevan, C K Clarke, K A George, F Di Lodovico, R Sacco, M Sigamani, G Cowan, H U Flaecher, D A Hopkins, S Paramesvaran, F Salvatore, A C Wren, D N Brown, C L Davis, A G Denig, M Fritsch, W Gradl, G Schott, K E Alwyn, D Bailey, R J Barlow, Y M Chia, C L Edgar, G Jackson, G D Lafferty, T J West, J I Yi, J Anderson, C Chen, A Jawahery, D A Roberts, G Simi, J M Tuggle, C Dallapiccola, X Li, E Salvati, S Saremi, R Cowan, D Dujmic, P H Fisher, G Sciolla, M Spitznagel, F Taylor, R K Yamamoto, M Zhao, P M Patel, S H Robertson, A Lazzaro, V Lombardo, F Palombo, J M Bauer, L Cremaldi, R Godang, R Kroeger, D A Sanders, D J Summers, H W Zhao, M Simard, P Taras, F B Viaud, H Nicholson, G De Nardo, L Lista, D Monorchio, G Onorato, C Sciacca, G Raven, H L Snoek, C P Jessop, K J Knoepfel, J M LoSecco, W F Wang, G Benelli, L A Corwin, K Honscheid, H Kagan, R Kass, J P Morris, A M Rahimi, J J Regensburger, S J Sekula, Q K Wong, N L Blount, J Brau, R Frey, O Igonkina, J A Kolb, M Lu, R Rahmat, N B Sinev, D Strom, J Strube, E Torrence, G Castelli, N Gagliardi, M Margoni, M Morandin, M Posocco, M Rotondo, F Simonetto, R Stroili, C Voci, P del Amo Sanchez, E Ben-Haim, H Briand, G Calderini, J Chauveau, P David, L Del Buono, O Hamon, Ph Leruste, J Ocariz, A Perez, J Prendki, S Sitt, L Gladney, M Biasini, R Covarelli, E Manoni, C Angelini, G Batignani, S Bettarini, M Carpinelli, A Cervelli, F Forti, M A Giorgi, A Lusiani, G Marchiori, M Morganti, N Neri, E Paoloni, G Rizzo, J J Walsh, D Lopes Pegna, C Lu, J Olsen, A J S Smith, A V Telnov, F Anulli, E Baracchini, G Cavoto, D del Re, E Di Marco, R Faccini, F Ferrarotto, F Ferroni, M Gaspero, P D Jackson, L Li Gioi, M A Mazzoni, S Morganti, G Piredda, F Polci, F Renga, C Voena, M Ebert, T Hartmann, H Schröder, R Waldi, T Adye, B Franek, E O Olaiya, F F Wilson, S Emery, M Escalier, L Esteve, S F Ganzhur, G Hamel de Monchenault, W Kozanecki, G Vasseur, Ch Yèche, M Zito, X R Chen, H Liu, W Park, M V Purohit, R M White, J R Wilson, M T Allen, D Aston, R Bartoldus, P Bechtle, J F Benitez, K Bertsche, Y Cai, R Cenci, J P Coleman, M R Convery, F J Decker, J C Dingfelder, J Dorfan, G P Dubois-Felsmann, W Dunwoodie, S Ecklund, R Erickson, R C Field, A Fisher, J Fox, A M Gabareen, S J Gowdy, M T Graham, P Grenier, C Hast, W R Innes, R Iverson, J Kaminski, M H Kelsey, H Kim, P Kim, M L Kocian, A Kulikov, D W G S Leith, S Li, B Lindquist, S Luitz, V Luth, H L Lynch, D B Macfarlane, 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Affiliations

  1. Laboratoire de Physique des Particules, IN2P3/CNRS et Université de Savoie, F-74941 Annecy-Le-Vieux, France.

PMID: 18764521 DOI: 10.1103/PhysRevLett.101.071801

Abstract

We report the results of a search for the bottomonium ground state etab(1S) in the photon energy spectrum with a sample of (109+/-1) million of Upsilon(3S) recorded at the Upsilon(3S) energy with the BABAR detector at the PEP-II B factory at SLAC. We observe a peak in the photon energy spectrum at Egamma=921.2(-2.8)+2.1(stat)+/-2.4(syst) MeV with a significance of 10 standard deviations. We interpret the observed peak as being due to monochromatic photons from the radiative transition Upsilon(3S)-->gammaetab(1S). This photon energy corresponds to an etab(1S) mass of 9388.9(-2.3)+3.1(stat)+/-2.7(syst) MeV/c2. The hyperfine Upsilon(1S)-etab(1S) mass splitting is 71.4(-3.1)+2.3(stat)+/-2.7(syst) MeV/c2. The branching fraction for this radiative Upsilon(3S) decay is estimated to be [4.8+/-0.5(stat)+/-1.2(syst)]x10(-4).

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