First Evidence for cos2β>0 and Resolution of the Cabibbo-Kobayashi-Maskawa Quark-Mixing Unitarity Triangle Ambiguity.

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Adachi, I, Adye, T, Ahmed, H, Ahn, JK, Aihara, H, Akar, S, Alam, MS, Albert, J, Anulli, F, Arnaud, N et al (show 415 more authors) , Asner, DM, Aston, D, Atmacan, H, Aushev, T, Ayad, R, Babu, V, Badhrees, I, Bakich, AM, Banerjee, Sw, Bansal, V, Barlow, RJ, Batignani, G, Beaulieu, A, Behera, P, Bellis, M, Ben-Haim, E, Bernard, D, Bernlochner, FU, Bettarini, S, Bettoni, D, Bevan, AJ, Bhardwaj, V, Bhuyan, B, Bianchi, F, Biasini, M, Biswal, J, Blinov, VE, Bomben, M, Bondar, A, Bonneaud, GR, Bozek, A, Bozzi, C, Bračko, M, Browder, TE, Brown, DN, Brown, DN, Bünger, C, Burchat, PR, Buzykaev, AR, Calabrese, R, Calcaterra, A, Calderini, G, Di Carlo, S, Carpinelli, M, Cartaro, C, Casarosa, G, Cenci, R, Chao, DS, Chauveau, J, Cheaib, R, Chen, A, Chen, C, Cheng, CH, Cheon, BG, Chilikin, K, Cho, K, Choi, Y, Choudhury, S, Chrzaszcz, M, Cibinetto, G, Cinabro, D, Cochran, J, Coleman, JP ORCID: 0000-0003-1319-0889, Convery, MR, Cowan, G, Cowan, R, Cremaldi, L, Cunliffe, S, Dash, N, Davier, M, Davis, CL, De Mori, F, De Nardo, G, Denig, AG, de Sangro, R, Dey, B, Di Lodovico, F, Dittrich, S, Doležal, Z, Dorfan, J, Drásal, Z, Druzhinin, VP, Dunwoodie, W, Ebert, M, Echenard, B, Eidelman, S, Eigen, G, Eisner, AM, Emery, S, Epifanov, D, Ernst, JA, Faccini, R, Fast, JE, Feindt, M, Ferber, T, Ferrarotto, F, Ferroni, F, Field, RC, Filippi, A, Finocchiaro, G, Fioravanti, E, Flood, KT, Forti, F, Fritsch, M, Fulsom, BG, Gabathuler, E, Gamba, D, Garg, R, Garmash, A, Gary, JW, Garzia, I, Gaur, V, Gaz, A, Gelb, M, Gershon, TJ, Li Gioi, L, Giorgi, MA, Giri, A, Godang, R, Goldenzweig, P, Golob, B, Golubev, VB, Gorodeisky, R, Gradl, W, Graham, MT, Grauges, E, Griessinger, K, Gritsan, AV, Grünberg, O, Guan, Y, Guido, E, Guttman, N, Haba, J, Hafner, A, Hara, T, Harrison, PF, Hast, C, Hayasaka, K, Hayashii, H, Hearty, C, Heck, M, Hedges, MT, Heß, M, Hirose, S, Hitlin, DG, Honscheid, K, Hou, W-S, Hsu, C-L, Huard, Z, Van Hulse, C, Hutchcroft, DE ORCID: 0000-0002-4174-6509, Inami, K, Inguglia, G, Innes, WR, Ishikawa, A, Itoh, R, Iwasaki, M, Iwasaki, Y, Izen, JM, Jacobs, WW, Jawahery, A, Jessop, CP, Jia, S, Jin, Y, Joo, KK, Julius, T, Kaliyar, AB, Kang, KH, Karyan, G, Kass, R, Kichimi, H, Kim, DY, Kim, JB, Kim, KT, Kim, SH, Kim, J, Kim, P, King, GJ, Kinoshita, K, Koch, H, Kodyš, P, Kolomensky, Yu G, Korpar, S, Kotchetkov, D, Kowalewski, R, Kravchenko, EA, Križan, P, Kroeger, R, Krokovny, P, Kuhr, T, Kulasiri, R, Kumita, T, Kuzmin, A, Kwon, Y-J, Lacker, HM, Lafferty, GD, Lanceri, L, Lange, JS, Lange, DJ, Lankford, AJ, Latham, TE, Leddig, T, Le Diberder, F, Lee, IS, Lee, SC, Lees, JP, Leith, DWGS, Li, LK, Li, YB, Li, Y, Libby, J, Liventsev, D, Lockman, WS, Long, O, LoSecco, JM, Lou, XC, Lubej, M, Lueck, T, Luitz, S, Luo, T, Luppi, E, Lusiani, A, Lutz, AM, MacFarlane, DB, MacNaughton, J, Mallik, U, Manoni, E, Marchiori, G, Margoni, M, Martellotti, S, Martinez-Vidal, F, Masuda, M, Matsuda, T, Mattison, TS, Matvienko, D, McKenna, JA, Meadows, BT, Merola, M, Miyabayashi, K, Miyashita, TS, Miyata, H, Mizuk, R, Mohanty, GB, Moon, HK, Mori, T, Muller, DR, Müller, T, Mussa, R, Nakano, E, Nakao, M, Nanut, T, Nath, KJ, Nayak, M, Neal, H, Neri, N, Nisar, NK, Nishida, S, Nugent, IM, Oberhof, B, Ocariz, J, Ogawa, S, Ongmongkolkul, P, Ono, H, Onuchin, AP, Onuki, Y, Oyanguren, A, Pakhlov, P, Pakhlova, G, Pal, B, Palano, A, Palombo, F, Panduro Vazquez, W, Paoloni, E, Pardi, S, Park, H, Passaggio, S, Patrignani, C, Patteri, P, Paul, S, Pavelkin, I, Payne, DJ, Pedlar, TK, Peimer, DR, Peruzzi, IM, Pestotnik, R, Piccolo, M, Piilonen, LE, Pilloni, A, Piredda, G, Poireau, V, Popov, V, Porter, FC, Posocco, M, Prell, S, Prepost, R, Puccio, EMT, Purohit, MV, Pushpawela, BG, Rama, M, Randle-Conde, A, Ratcliff, BN, Raven, G, Resmi, PK, Ritchie, JL, Ritter, M, Rizzo, G, Roberts, DA, Robertson, SH, Röhrken, M, Roney, JM, Roodman, A, Rossi, A, Rotondo, M, Rozanska, M, Russo, G, Sacco, R, Al Said, S, Sakai, Y, Salehi, M, Sandilya, S, Santelj, L, Santoro, V, Sanuki, T, Savinov, V, Schneider, O, Schnell, G, Schroeder, T, Schubert, KR, Schwanda, C, Schwartz, AJ, Schwitters, RF, Sciacca, C, Seddon, RM, Seino, Y, Sekula, SJ, Senyo, K, Seon, O, Serednyakov, SI, Sevior, ME, Shebalin, V, Shen, CP, Shibata, T-A, Shimizu, N, Shiu, J-G, Simi, G, Simon, F, Simonetto, F, Skovpen, Yu I, Smith, JG, Smith, AJS, So, RY, Sobie, RJ, Soffer, A, Sokoloff, MD, Solodov, EP, Solovieva, E, Spanier, SM, Starič, M, Stroili, R, Sullivan, MK, Sumisawa, K, Sumiyoshi, T, Summers, DJ, Sun, L, Takizawa, M, Tamponi, U, Tanida, K, Taras, P, Tasneem, N, Tenchini, F, Tisserand, V, Todyshevx, K Yu, Touramanis, C ORCID: 0000-0001-5191-2171, Uchida, M, Uglov, T, Unno, Y, Uno, S, Vahsen, SE, Varner, G, Vasseur, G, Va'vra, J, Červenkov, D, Verderi, M, Vitale, L, Vorobyev, V, Voß, C, Wagner, SR, Waheed, E, Waldi, R, Walsh, JJ, Wang, B, Wang, CH, Wang, M-Z, Wang, P, Watanabe, Y, Wilson, FF, Wilson, JR, Wisniewski, WJ, Won, E, Wormser, G, Wright, DM, Wu, SL, Ye, H, Yuan, CZ, Yusa, Y, Zakharov, S, Zallo, A, Zani, L, Zhang, ZP, Zhilich, V, Zhukova, V, Zhulanov, V, Zupanc, A, <i>B<span class="sc">A</span>B<span class="sc">AR</span></i> Col and Belle Collaboration (2018) First Evidence for cos2β>0 and Resolution of the Cabibbo-Kobayashi-Maskawa Quark-Mixing Unitarity Triangle Ambiguity. Physical review letters, 121 (26). 261801-.

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Abstract

We present first evidence that the cosine of the CP-violating weak phase 2β is positive, and hence exclude trigonometric multifold solutions of the Cabibbo-Kobayashi-Maskawa (CKM) Unitarity Triangle using a time-dependent Dalitz plot analysis of B^{0}→D^{(*)}h^{0} with D→K_{S}^{0}π^{+}π^{-} decays, where h^{0}∈{π^{0},η,ω} denotes a light unflavored and neutral hadron. The measurement is performed combining the final data sets of the BABAR and Belle experiments collected at the ϒ(4S) resonance at the asymmetric-energy B factories PEP-II at SLAC and KEKB at KEK, respectively. The data samples contain (471±3)×10^{6}BB[over ¯] pairs recorded by the BABAR detector and (772±11)×10^{6}BB[over ¯] pairs recorded by the Belle detector. The results of the measurement are sin2β=0.80±0.14(stat)±0.06(syst)±0.03(model) and cos2β=0.91±0.22(stat)±0.09(syst)±0.07(model). The result for the direct measurement of the angle β of the CKM Unitarity Triangle is β=[22.5±4.4(stat)±1.2(syst)±0.6(model)]°. The measurement assumes no direct CP violation in B^{0}→D^{(*)}h^{0} decays. The quoted model uncertainties are due to the composition of the D^{0}→K_{S}^{0}π^{+}π^{-} decay amplitude model, which is newly established by performing a Dalitz plot amplitude analysis using a high-statistics e^{+}e^{-}→cc[over ¯] data sample. CP violation is observed in B^{0}→D^{(*)}h^{0} decays at the level of 5.1 standard deviations. The significance for cos2β>0 is 3.7 standard deviations. The trigonometric multifold solution π/2-β=(68.1±0.7)° is excluded at the level of 7.3 standard deviations. The measurement resolves an ambiguity in the determination of the apex of the CKM Unitarity Triangle.

Item Type:	Article
Additional Information:	To be submitted to Physical Review Letters
Uncontrolled Keywords:	Belle Collaboration
Depositing User:	Symplectic Admin
Date Deposited:	02 Dec 2020 14:03
Last Modified:	18 Jan 2023 23:19
DOI:	10.1103/physrevlett.121.261801
Open Access URL:	https://journals.aps.org/prl/abstract/10.1103/Phys...
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3108883

Available Versions of this Item

• First Evidence for cos2β>0 and Resolution of the Cabibbo-Kobayashi-Maskawa Quark-Mixing Unitarity Triangle Ambiguity. (deposited 25 Apr 2018 09:49)
  • First Evidence for cos2β>0 and Resolution of the Cabibbo-Kobayashi-Maskawa Quark-Mixing Unitarity Triangle Ambiguity. (deposited 02 Dec 2020 14:03) [Currently Displayed]