Study of the psi(2)(3823) and chi(c1)(3872) states in B+->(J/psi pi(+)pi(-))K(+)decays

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Aaij, R, Beteta, C Abellan, Ackernley, T, Adeva, B, Adinolfi, M, Afsharnia, H, Aidala, CA, Aiola, S, Ajaltouni, Z, Akar, S et al (show 918 more authors) , Albrecht, J, Alessio, F, Alexander, M, Alfonso Albero, A, Aliouche, Z, Alkhazov, G, Cartelle, P Alvarez, Jr, Alves AA, Amato, S, Amhis, Y, An, L, Anderlini, L, Andreassi, G, Andreianov, A, Andreotti, M, Archilli, F, Artamonov, A, Artuso, M, Arzymatov, K, Aslanides, E, Atzeni, M, Audurier, B, Bachmann, S, Bachmayer, M, Back, JJ, Baker, S, Rodriguez, P Baladron, Balagura, V, Baldini, W, Baptista Leite, J, Barlow, RJ, Barsuk, S, Barter, W, Bartolini, M, Baryshnikov, F, Basels, JM, Bassi, G, Batozskaya, V, Batsukh, B, Battig, A, Bay, A, Becker, M, Bedeschi, F, Bediaga, I, Beiter, A, Belavin, V, Belin, S, Bellee, V, Belous, K, Belyaev, I, Bencivenni, G, Ben-Haim, E, Berezhnoy, A, Bernet, R, Berninghoff, D, Bernstein, HC, Bertella, C, Bertholet, E, Bertolin, A, Betancourt, C, Betti, F, Bettler, MO, Bezshyiko, Ia, Bhasin, S, Bhom, J, Bian, L, Bieker, MS, Bifani, S, Boelhauve, JA, Billoir, P, Bishop, FCR, Bizzeti, A, Bjorn, M, Blago, MP, Blake, T, Blanc, F, Blusk, S, Bobulska, D, Bocci, V, Boente Garcia, O, Boettcher, T, Boldyrev, A, Bondar, A, Bondar, N, Borghi, S, Borisyak, M, Borsato, M, Borsuk, JT, Bouchiba, SA, Bowcock, TJV ORCID: 0000-0002-3505-6915, Boyer, A, Bozzi, C, Bradley, MJ, Braun, S, Brea Rodriguez, A, Brodski, M, Brodzicka, J, Brossa Gonzalo, A, Brundu, D, Buchanan, E, Buonaura, A, Burr, C, Bursche, A, Butkevich, A, Butter, JS, Buytaert, J, Byczynski, W, Cadeddu, S, Cai, H, Calabrese, R, Diaz, L Calero, Cali, S, Calladine, R, Calvi, M, Gomez, M Calvo, Magalhaes, P Camargo, Camboni, A, Campana, P, Perez, DH Campora, Quezada, AF Campoverde, Capelli, S, Capriotti, L, Carbone, A, Carboni, G, Cardinale, R, Cardini, A, Carli, I, Carniti, P, Akiba, K Carvalho, Casais Vidal, A, Casse, G ORCID: 0000-0002-8516-237X, Cattaneo, M, Cavallero, G, Celani, S, Cenci, R, Cerasoli, J, Chadwick, AJ, Chapman, MG, Charles, M, Charpentier, Ph, Chatzikonstantinidis, G, Chefdeville, M, Chekalina, V, Chen, C, Chen, S, Chernov, A, Chitic, S-G, Chobanova, V, Cholak, S, Chrzaszcz, M, Chubykin, A, Chulikov, V, Ciambrone, P, Cicala, MF, Cid Vidal, X, Ciezarek, G, Cindolo, F, Clarke, PEL, Clemencic, M, Cliff, HV, Closier, J, Cobbledick, JL, Coco, V, Coelho, JAB, Cogan, J, Cogneras, E, Cojocariu, L, Collins, P, Colombo, T, Contu, A, Cooke, N, Coombs, G, Coquereau, S, Corti, G, Sobral, CM Costa, Couturier, B, Craik, DC, Crkovska, J, Crocombe, A, Torres, M Cruz, Currie, R, Da Silva, CL, Dall'Occo, E, Dalseno, J, D'Ambrosio, C, Danilina, A, Davis, A, Francisco, O De Aguiar, De Bruyn, K, De Capua, S, De Cian, M, De Miranda, JM, De Paula, L, De Serio, M, De Simone, P, de Vries, JA, Dean, CT, Dean, W, Decamp, D, Del Buono, L, Delaney, B, Dembinski, H-P, Dendek, A, Denysenko, V, Derkach, D, Deschamps, O, Desse, F, Dettori, F, Dey, B, Di Canto, A, Di Nezza, P, Didenko, S, Dijkstra, H, Dobishuk, V, Donohoe, AM, Dordei, F, Dorigo, M, dos Reis, AC, Douglas, L, Dovbnya, A, Dreimanis, K, Dudek, MW, Dufour, L, Durante, P, Durham, JM, Dutta, D, Dziewiecki, M, Dziurda, A, Dzyuba, A, Easo, S, Egede, U, Egorychev, V, Eidelman, S, Eisenhardt, S, Ek-In, S, Eklund, L, Ely, S, Ene, A, Epple, E, Escher, S, Eschle, J, Esen, S, Evans, T, Falabella, A, Fan, J, Fan, Y, Fang, B, Farley, N, Farry, S ORCID: 0000-0001-5119-9740, Fazzini, D, Fedin, P, Feo, M, Fernandez Declara, P, Fernandez Prieto, A, Ferrari, F, Ferreira Lopes, L, Ferreira Rodrigues, F, Sole, S Ferreres, Ferrillo, M, Ferro-Luzzi, M, Filippov, S, Fini, RA, Fiorini, M, Firlej, M, Fischer, KM, Fitzpatrick, C, Fiutowski, T, Fleuret, F, Fontana, M, Fontanelli, F, Forty, R, Lima, V Franco ORCID: 0000-0002-3761-209X, Sevilla, M Franco, Frank, M, Franzoso, E, Frau, G, Frei, C, Friday, DA, Fu, J, Fuehring, Q, Funk, W, Gabriel, E, Gaintseva, T, Torreira, A Gallas, Galli, D, Gallorini, S, Gambetta, S, Gan, Y, Gandelman, M, Gandini, P, Gao, Y, Garcia Martin, LM, Garcia Plana, B, Garcia Rosales, FA, Garrido, L, Gascon, D, Gaspar, C, Gerick, D, Gersabeck, E, Gersabeck, M, Gershon, T, Gerstel, D, Ghez, Ph, Gibson, V, Gioventu, A, Gironell, P Gironella, Giubega, L, Giugliano, C, Gizdov, K, Gligorov, VV, Gobel, C, Golobardes, E, Golubkov, D, Golutvin, A, Gomes, A, Gorbounov, P, Gorelov, IV, Gotti, C, Govorkova, E, Grabowski, JP, Diaz, R Graciani, Grammatico, T, Cardoso, LA Granado, Grauges, E, Graverini, E, Graziani, G, Grecu, A, Greim, R, Griffith, P, Grillo, L, Gruber, L, Cazon, BR Gruberg, Gu, C, Guarise, M, Guenther, PA, Gushchin, E, Guth, A, Guz, Yu, Gys, T, Hadavizadeh, T, Haefeli, G, Haen, C, Haines, SC, Hamilton, PM, Han, Q, Han, X, Hancock, TH, Hansmann-Menzemer, S, Harnew, N, Harrison, T, Hart, R, Hasse, C, Hatch, M, He, J, Hecker, M, Heijhoff, K, Heinicke, K, Hennequin, AM, Hennessy, K ORCID: 0000-0002-1529-8087, Henry, L, Heuel, J, Hicheur, A, Hill, D, Hilton, M, Hopchev, PH, Hu, J, Hu, J, Hu, W, Huang, W, Hulsbergen, W, Humair, T, Hunter, RJ, Hushchyn, M, Hutchcroft, D ORCID: 0000-0002-4174-6509, Hynds, D, Ibis, P, Idzik, M, Ilten, P, Inglessi, A, Ivshin, K, Jacobsson, R, Jakobsen, S, Jans, E, Jashal, BK, Jawahery, A, Jevtic, V, Jiang, F, John, M, Johnson, D, Jones, CR, Jost, B, Jurik, N, Kandybei, S, Karacson, M, Kariuki, JM, Kazeev, N, Kecke, M, Keizer, F, Kelsey, M, Kenzie, M, Ketel, T, Khanji, B, Kharisova, A, Kim, KE, Kirn, T, Kirsebom, VS, Klaver, S, Klimaszewski, K, Koliiev, S, Kondybayeva, A, Konoplyannikov, A, Kopciewicz, P, Kopecna, R, Koppenburg, P, Korolev, M, Kostiuk, I, Kot, O, Kotriakhova, S, Kravchuk, L, Krawczyk, RD, Kreps, M, Kress, F, Kretzschmar, S, Krokovny, P, Krupa, W, Krzemien, W, Kucewicz, W, Kucharczyk, M, Kudryavtsev, V, Kuindersma, HS, Kunde, GJ, Kvaratskheliya, T, Lacarrere, D, Lafferty, G, Lai, A, Lancierini, D, Lane, JJ, Lanfranchi, G, Langenbruch, C, Lantwin, O, Latham, T, Lazzari, F, Le Gac, R, Lee, SH, Lefevre, R, Leflat, A, Leroy, O, Lesiak, T, Leverington, B, Li, H, Li, L, Li, X, Li, Y, Li, Z, Liang, X, Lin, T, Lindner, R, Lisovskyi, V, Liu, G, Liu, X, Loh, D, Loi, A, Castro, J Lomba, Longstaff, I, Lopes, JH, Loustau, G, Lovell, GH, Lu, Y, Lucchesi, D, Martinez, M Lucio, Luo, Y, Lupato, A, Luppi, E, Lupton, O, Lusiani, A, Lyu, X, Ma, L, Maccolini, S, Machefert, F, Maciuc, F, Macko, V, Mackowiak, P, Maddrell-Mander, S, Mohan, LR Madhan, Maev, O, Maevskiy, A, Maisuzenko, D, Majewski, MW, Malde, S, Malecki, B, Malinin, A, Maltsev, T, Malygina, H, Manca, G, Mancinelli, G, Escalero, R Manera, Manuzzi, D, Marangotto, D, Maratas, J, Marchand, JF, Marconi, U, Mariani, S, Benito, C Marin, Marinangeli, M, Marino, P, Marks, J, Marshall, J, Martellotti, G, Martinazzoli, L, Martinelli, M, Santos, D Martinez, Vidal, F Martinez, Massafferri, A, Materok, M, Matev, R, Mathad, A, Mathe, Z, Matiunin, V, Matteuzzi, C, Mattioli, KR, Mauri, A, Maurice, E, McCann, M, Mcconnell, L, McNab, A, McNulty, R, Mead, JV ORCID: 0000-0003-0875-2533, Meadows, B, Meaux, C, Meier, G, Meinert, N, Melnychuk, D, Meloni, S, Merk, M, Merli, A, Garcia, L Meyer, Mikhasenko, M, Milanes, DA, Millard, E, Minard, M-N, Mineev, O, Minzoni, L, Mitchell, SE, Mitreska, B, Mitzel, DS, Modden, A, Mogini, A, Moise, RD, Mombacher, T, Monroy, IA, Monteil, S, Morandin, M, Morello, G, Morello, MJ, Moron, J, Morris, AB, Morris, AG, Mountain, R, Mu, H, Muheim, F, Mukherjee, M, Mulder, M, Muller, D, Muller, K, Murphy, CH, Murray, D, Muzzetto, P, Naik, P, Nakada, T, Nandakumar, R, Nanut, T, Nasteva, I, Needham, M, Neri, I, Neri, N, Neubert, S, Neufeld, N, Newcombe, R, Nguyen, TD, Nguyen-Mau, C, Niel, EM, Nieswand, S, Nikitin, N, Nolte, NS, Nunez, C, Oblakowska-Mucha, A, Obraztsov, V, Ogilvy, S, O'Hanlon, DP, Oldeman, R, Onderwater, CJG, Osborn, JD, Ossowska, A, Goicochea, JM Otalora, Ovsiannikova, T, Owen, P, Oyanguren, A, Pagare, B, Pais, PR, Pajero, T, Palano, A, Palutan, M, Panshin, G, Papanestis, A, Pappagallo, M, Pappalardo, LL, Pappenheimer, C, Parker, W, Parkes, C, Passaleva, G, Pastore, A, Patel, M, Patrignani, C, Pearce, A, Pellegrino, A, Altarelli, M Pepe, Perazzini, S, Pereima, D, Perret, P, Petridis, K, Petrolini, A, Petrov, A, Petrucci, S, Petruzzo, M, Philippov, A, Pica, L, Pietrzyk, B, Pietrzyk, G, Pili, M, Pinci, D, Pinzino, J, Pisani, F, Piucci, A, Placinta, V, Playfer, S, Plews, J, Casasus, M Plo, Polci, F, Lener, M Poli, Poliakova, M, Poluektov, A, Polukhina, N, Polyakov, I, Polycarpo, E, Pomery, GJ, Ponce, S, Popov, A, Popov, D, Popov, S, Poslavskii, S, Prasanth, K, Promberger, L, Prouve, C, Pugatch, V, Navarro, A Puig, Pullen, H, Punzi, G, Qian, W, Qin, J, Quagliani, R, Quintana, B, Raab, NV, Trejo, RI Rabadan, Rachwal, B, Rademacker, JH, Rama, M, Pernas, M Ramos, Rangel, MS, Ratnikov, F, Raven, G, Reboud, M, Redi, F, Reiss, F, Alepuz, C Remon, Ren, Z, Renaudin, V, Ricciardi, S, Richards, DS, Richards, S, Rinnert, K, Robbe, P, Robert, A, Rodrigues, AB, Rodrigues, E, Lopez, JA Rodriguez, Roehrken, M, Rollings, A, Romanovskiy, V, Lamas, M Romero, Vidal, A Romero, Roth, JD, Rotondo, M, Rudolph, MS, Ruf, T, Vidal, J Ruiz, Ryzhikov, A, Ryzka, J, Silva, JJ Saborido, Sagidova, N, Sahoo, N, Saitta, B, Gras, C Sanchez, Mayordomo, C Sanchez, Santacesaria, R, Rios, C Santamarina, Santimaria, M, Santovetti, E, Sarpis, G, Sarpis, M, Sarti, A, Satriano, C, Satta, A, Saur, M, Savrina, D, Sazak, H, Smead, LG Scantlebury, Schael, S, Schellenberg, M, Schiller, M, Schindler, H, Schmelling, M, Schmelzer, T, Schmidt, B, Schneider, O, Schopper, A, Schreiner, HF, Schubiger, M, Schulte, S, Schune, MH, Schwemmer, R, Sciascia, B, Sciubba, A, Sellam, S, Semennikov, A, Sergi, A, Serra, N, Serrano, J, Sestini, L, Seuthe, A, Seyfert, P, Shangase, DM, Shapkin, M, Shchutska, L, Shears, T ORCID: 0000-0002-2653-1366, Shekhtman, L, Shevchenko, V, Shields, EB, Shmanin, E, Shupperd, JD, Siddi, BG, Coutinho, R Silva, de Oliveira, L Silva, Simi, G, Simone, S, Skiba, I, Skidmore, N, Skwarnicki, T, Slater, MW, Smeaton, JG, Smetkina, A, Smith, E, Smith, IT, Smith, M, Snoch, A, Soares, M, Lavra, L Soares, Sokoloff, MD, Soler, FJP, De Paula, B Souza, Spaan, B, Norella, E Spadaro, Spradlin, P, Stagni, F, Stahl, M, Stahl, S, Stefko, P, Steinkamp, O, Stemmle, S, Stenyakin, O, Stepanova, M, Stevens, H, Stone, S, Stracka, S, Stramaglia, ME, Straticiuc, M, Strokov, S, Sun, J, Sun, L, Sun, Y, Svihra, P, Swientek, K, Szabelski, A, Szumlak, T, Szymanski, M, Taneja, S, Tang, Z, Tekampe, T, Teubert, F, Thomas, E, Thomson, KA, Tilley, MJ, Tisserand, V, T'Jampens, S, Tobin, M, Tolk, S, Tomassetti, L, Machado, D Torres, Tou, DY, Tournefier, E, Traill, M, Tran, MT, Trifonova, E, Trippl, C, Tsaregorodtsev, A, Tuci, G, Tully, A, Tuning, N, Ukleja, A, Usachov, A, Ustyuzhanin, A, Uwer, U, Vagner, A, Vagnoni, V, Valassi, A, Valenti, G, van Beuzekom, M, Van Hecke, H, van Herwijnen, E, Van Hulse, CB, van Veghel, M, Vazquez Gomez, R, Vazquez Regueiro, P, Sierra, C Vazquez, Vecchi, S, Velthuis, JJ, Veltri, M, Venkateswaran, A, Veronesi, M, Vesterinen, M, Vieira, D, Diaz, M Vieites, Viemann, H, Vilasis-Cardona, X, Vitali, G, Vitkovskiy, A, Vollhardt, A, Vom Bruch, D, Vorobyev, A, Vorobyev, V, Voropaev, N, Waldi, R, Walsh, J, Wang, J, Wang, J, Wang, J, Wang, M, Wang, Y, Wang, Z, Ward, DR, Wark, HM, Watson, NK, Websdale, D, Weiden, A, Weisser, C, Westhenry, BDC, White, DJ, Whitehead, M, Wiedner, D, Wilkinson, G, Wilkinson, M, Williams, I, Williams, M, Williams, MRJ, Williams, T, Wilson, FF, Wislicki, W, Witek, M, Witola, L, Wormser, G, Wotton, SA, Wu, H, Wyllie, K, Xiang, Z, Xiao, D, Xie, Y, Xing, H, Xu, A, Xu, J, Xu, L, Xu, M, Xu, Q, Xu, Z, Yang, Z, Yao, Y, Yeomans, LE, Yin, H, Yu, J, Yuan, X, Yushchenko, O, Zarebski, KA, Zavertyaev, M, Zdybal, M, Zeng, M, Zhang, D, Zhang, L, Zhang, S, Zhang, WC, Zhang, Y, Zhelezov, A, Zheng, Y, Zhou, X, Zhou, Y, Zhu, X, Zhukov, V, Zonneveld, JB, Zucchelli, S, Zuliani, D and Zunica, G (2020) Study of the psi(2)(3823) and chi(c1)(3872) states in B+->(J/psi pi(+)pi(-))K(+)decays. The Journal of High Energy Physics, 2020 (8). 123-.

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Abstract

<jats:title>A<jats:sc>bstract</jats:sc></jats:title><jats:p>The decays B<jats:sup>+</jats:sup><jats:italic>→</jats:italic>J<jats:italic>/</jats:italic>ψπ<jats:sup>+</jats:sup>π<jats:sup><jats:italic>−</jats:italic></jats:sup>K<jats:sup>+</jats:sup>are studied using a data set corresponding to an integrated luminosity of 9 fb<jats:sup><jats:italic>−</jats:italic>1</jats:sup>collected with the LHCb detector in proton-proton collisions between 2011 and 2018. Precise measurements of the ratios of branching fractions with the intermediate ψ<jats:sub>2</jats:sub>(3823), χ<jats:sub>c1</jats:sub>(3872) and ψ(2S) states are reported. The values are<jats:disp-formula><jats:alternatives><jats:tex-math>$$ {\displaystyle \begin{array}{c}\frac{{\mathcal{B}}_{{\mathrm{B}}^{+}\to {\uppsi}_2(3823){\mathrm{K}}^{+}}\times {\mathcal{B}}_{\uppsi_2(3823)\to \mathrm{J}/{\uppsi \uppi}^{+}{\uppi}^{-}}}{{\mathcal{B}}_{{\mathrm{B}}^{+}\to {\upchi}_{\mathrm{c}1}(3872){\mathrm{K}}^{+}}\times {\mathcal{B}}_{\upchi_{\mathrm{c}1}(3872)\to \mathrm{J}/{\uppsi \uppi}^{+}{\uppi}^{-}}}=\left(3.56\pm 0.67\pm 0.11\right)\times {10}^{-2},\\ {}\frac{{\mathcal{B}}_{{\mathrm{B}}^{+}\to {\uppsi}_2(3823){\mathrm{K}}^{+}}\times {\mathcal{B}}_{\uppsi_2(3823)\to \mathrm{J}/{\uppsi \uppi}^{+}{\uppi}^{-}}}{{\mathcal{B}}_{{\mathrm{B}}^{+}\to \uppsi \left(2\mathrm{S}\right){\mathrm{K}}^{+}}\times {\mathcal{B}}_{\uppsi \left(2\mathrm{S}\right)\to \mathrm{J}/{\uppsi \uppi}^{+}{\uppi}^{-}}}=\left(1.31\pm 0.25\pm 0.04\right)\times {10}^{-3},\\ {}\frac{{\mathcal{B}}_{\mathrm{B}+\to {\upchi}_{\mathrm{c}1}(3872){\mathrm{K}}^{+}}\times {\mathcal{B}}_{\upchi_{\mathrm{c}1}(3872)\to \mathrm{J}/{\uppsi \uppi}^{+}{\uppi}^{-}}}{{\mathcal{B}}_{{\mathrm{B}}^{+}\to \uppsi \left(2\mathrm{S}\right){\mathrm{K}}^{+}}\times {\mathcal{B}}_{\uppsi \left(2\mathrm{S}\right)\to \mathrm{J}/{\uppsi \uppi}^{+}{\uppi}^{-}}}=\left(3.69\pm 0.07\pm 0.06\right)\times {10}^{-2},\end{array}} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mtable><mml:mtr><mml:mtd><mml:maligngroup /><mml:mfrac><mml:mrow><mml:msub><mml:mi>B</mml:mi><mml:mrow><mml:msup><mml:mi>B</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:mo>→</mml:mo><mml:msub><mml:mi>ψ</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mfenced><mml:mn>3823</mml:mn></mml:mfenced><mml:msup><mml:mi>K</mml:mi><mml:mo>+</mml:mo></mml:msup></mml:mrow></mml:msub><mml:mo>×</mml:mo><mml:msub><mml:mi>B</mml:mi><mml:mrow><mml:msub><mml:mi>ψ</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mfenced><mml:mn>3823</mml:mn></mml:mfenced><mml:mo>→</mml:mo><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:msup><mml:mi>ψπ</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>π</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mi>B</mml:mi><mml:mrow><mml:msup><mml:mi>B</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:mo>→</mml:mo><mml:msub><mml:mi>χ</mml:mi><mml:mrow><mml:mi>c</mml:mi><mml:mn>1</mml:mn></mml:mrow></mml:msub><mml:mfenced><mml:mn>3872</mml:mn></mml:mfenced><mml:msup><mml:mi>K</mml:mi><mml:mo>+</mml:mo></mml:msup></mml:mrow></mml:msub><mml:mo>×</mml:mo><mml:msub><mml:mi>B</mml:mi><mml:mrow><mml:msub><mml:mi>χ</mml:mi><mml:mrow><mml:mi>c</mml:mi><mml:mn>1</mml:mn></mml:mrow></mml:msub><mml:mfenced><mml:mn>3872</mml:mn></mml:mfenced><mml:mo>→</mml:mo><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:msup><mml:mi>ψπ</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>π</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:mrow></mml:msub></mml:mrow></mml:mfrac><mml:mo>=</mml:mo><mml:mfenced><mml:mrow><mml:mn>3.56</mml:mn><mml:mo>±</mml:mo><mml:mn>0.67</mml:mn><mml:mo>±</mml:mo><mml:mn>0.11</mml:mn></mml:mrow></mml:mfenced><mml:mo>×</mml:mo><mml:msup><mml:mn>10</mml:mn><mml:mrow><mml:mo>−</mml:mo><mml:mn>2</mml:mn></mml:mrow></mml:msup><mml:mo>,</mml:mo></mml:mtd></mml:mtr><mml:mtr><mml:mtd><mml:maligngroup /><mml:mfrac><mml:mrow><mml:msub><mml:mi>B</mml:mi><mml:mrow><mml:msup><mml:mi>B</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:mo>→</mml:mo><mml:msub><mml:mi>ψ</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mfenced><mml:mn>3823</mml:mn></mml:mfenced><mml:msup><mml:mi>K</mml:mi><mml:mo>+</mml:mo></mml:msup></mml:mrow></mml:msub><mml:mo>×</mml:mo><mml:msub><mml:mi>B</mml:mi><mml:mrow><mml:msub><mml:mi>ψ</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mfenced><mml:mn>3823</mml:mn></mml:mfenced><mml:mo>→</mml:mo><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:msup><mml:mi>ψπ</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>π</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mi>B</mml:mi><mml:mrow><mml:msup><mml:mi>B</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:mo>→</mml:mo><mml:mi>ψ</mml:mi><mml:mfenced><mml:mrow><mml:mn>2</mml:mn><mml:mi>S</mml:mi></mml:mrow></mml:mfenced><mml:msup><mml:mi>K</mml:mi><mml:mo>+</mml:mo></mml:msup></mml:mrow></mml:msub><mml:mo>×</mml:mo><mml:msub><mml:mi>B</mml:mi><mml:mrow><mml:mi>ψ</mml:mi><mml:mfenced><mml:mrow><mml:mn>2</mml:mn><mml:mi>S</mml:mi></mml:mrow></mml:mfenced><mml:mo>→</mml:mo><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:msup><mml:mi>ψπ</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>π</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:mrow></mml:msub></mml:mrow></mml:mfrac><mml:mo>=</mml:mo><mml:mfenced><mml:mrow><mml:mn>1.31</mml:mn><mml:mo>±</mml:mo><mml:mn>0.25</mml:mn><mml:mo>±</mml:mo><mml:mn>0.04</mml:mn></mml:mrow></mml:mfenced><mml:mo>×</mml:mo><mml:msup><mml:mn>10</mml:mn><mml:mrow><mml:mo>−</mml:mo><mml:mn>3</mml:mn></mml:mrow></mml:msup><mml:mo>,</mml:mo></mml:mtd></mml:mtr><mml:mtr><mml:mtd><mml:maligngroup /><mml:mfrac><mml:mrow><mml:msub><mml:mi>B</mml:mi><mml:mrow><mml:mi>B</mml:mi><mml:mo>+</mml:mo><mml:mo>→</mml:mo><mml:msub><mml:mi>χ</mml:mi><mml:mrow><mml:mi>c</mml:mi><mml:mn>1</mml:mn></mml:mrow></mml:msub><mml:mfenced><mml:mn>3872</mml:mn></mml:mfenced><mml:msup><mml:mi>K</mml:mi><mml:mo>+</mml:mo></mml:msup></mml:mrow></mml:msub><mml:mo>×</mml:mo><mml:msub><mml:mi>B</mml:mi><mml:mrow><mml:msub><mml:mi>χ</mml:mi><mml:mrow><mml:mi>c</mml:mi><mml:mn>1</mml:mn></mml:mrow></mml:msub><mml:mfenced><mml:mn>3872</mml:mn></mml:mfenced><mml:mo>→</mml:mo><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:msup><mml:mi>ψπ</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>π</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mi>B</mml:mi><mml:mrow><mml:msup><mml:mi>B</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:mo>→</mml:mo><mml:mi>ψ</mml:mi><mml:mfenced><mml:mrow><mml:mn>2</mml:mn><mml:mi>S</mml:mi></mml:mrow></mml:mfenced><mml:msup><mml:mi>K</mml:mi><mml:mo>+</mml:mo></mml:msup></mml:mrow></mml:msub><mml:mo>×</mml:mo><mml:msub><mml:mi>B</mml:mi><mml:mrow><mml:mi>ψ</mml:mi><mml:mfenced><mml:mrow><mml:mn>2</mml:mn><mml:mi>S</mml:mi></mml:mrow></mml:mfenced><mml:mo>→</mml:mo><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:msup><mml:mi>ψπ</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>π</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:mrow></mml:msub></mml:mrow></mml:mfrac><mml:mo>=</mml:mo><mml:mfenced><mml:mrow><mml:mn>3.69</mml:mn><mml:mo>±</mml:mo><mml:mn>0.07</mml:mn><mml:mo>±</mml:mo><mml:mn>0.06</mml:mn></mml:mrow></mml:mfenced><mml:mo>×</mml:mo><mml:msup><mml:mn>10</mml:mn><mml:mrow><mml:mo>−</mml:mo><mml:mn>2</mml:mn></mml:mrow></mml:msup><mml:mo>,</mml:mo></mml:mtd></mml:mtr></mml:mtable></mml:math></jats:alternatives></jats:disp-formula></jats:p><jats:p>where the first uncertainty is statistical and the second is systematic. The decay of B<jats:sup>+</jats:sup><jats:italic>→</jats:italic>ψ<jats:sub>2</jats:sub>(3823)K<jats:sup>+</jats:sup>with ψ<jats:sub>2</jats:sub>(3823)<jats:italic>→</jats:italic>J<jats:italic>/</jats:italic>ψπ<jats:sup>+</jats:sup>π<jats:sup><jats:italic>−</jats:italic></jats:sup>is observed for the first time with a significance of 5.1 standard deviations. The mass differences between the ψ<jats:sub>2</jats:sub>(3823), χ<jats:sub>c1</jats:sub>(3872) and ψ(2S) states are measured to be</jats:p><jats:p><jats:disp-formula><jats:alternatives><jats:tex-math>$$ {\displaystyle \begin{array}{c}{m}_{\upchi_{\mathrm{c}1}(3872)}-{m}_{\uppsi_2(3823)}=47.50\pm 0.53\pm 0.13\;\mathrm{MeV}/{c}^2,\\ {}{m}_{\uppsi_2(3823)}-{m}_{\uppsi_2\left(2\mathrm{S}\right)}=137.98\pm 0.53\pm 0.14\;\mathrm{MeV}/{c}^2,\\ {}{m}_{\upchi_{\mathrm{c}1}(3872)}-{m}_{\uppsi_2\left(2\mathrm{S}\right)}=185.49\pm 0.06\pm 0.03\;\mathrm{MeV}/{c}^2,\end{array}} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mtable><mml:mtr><mml:mtd><mml:maligngroup /><mml:msub><mml:mi>m</mml:mi><mml:mrow><mml:msub><mml:mi>χ</mml:mi><mml:mrow><mml:mi>c</mml:mi><mml:mn>1</mml:mn></mml:mrow></mml:msub><mml:mfenced><mml:mn>3872</mml:mn></mml:mfenced></mml:mrow></mml:msub><mml:mo>−</mml:mo><mml:msub><mml:mi>m</mml:mi><mml:mrow><mml:msub><mml:mi>ψ</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mfenced><mml:mn>3823</mml:mn></mml:mfenced></mml:mrow></mml:msub><mml:mo>=</mml:mo><mml:mn>47.50</mml:mn><mml:mo>±</mml:mo><mml:mn>0.53</mml:mn><mml:mo>±</mml:mo><mml:mn>0.13</mml:mn><mml:mspace /><mml:mi>MeV</mml:mi><mml:mo>/</mml:mo><mml:msup><mml:mi>c</mml:mi><mml:mn>2</mml:mn></mml:msup><mml:mo>,</mml:mo></mml:mtd></mml:mtr><mml:mtr><mml:mtd><mml:maligngroup /><mml:msub><mml:mi>m</mml:mi><mml:mrow><mml:msub><mml:mi>ψ</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mfenced><mml:mn>3823</mml:mn></mml:mfenced></mml:mrow></mml:msub><mml:mo>−</mml:mo><mml:msub><mml:mi>m</mml:mi><mml:mrow><mml:msub><mml:mi>ψ</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mfenced><mml:mrow><mml:mn>2</mml:mn><mml:mi>S</mml:mi></mml:mrow></mml:mfenced></mml:mrow></mml:msub><mml:mo>=</mml:mo><mml:mn>137.98</mml:mn><mml:mo>±</mml:mo><mml:mn>0.53</mml:mn><mml:mo>±</mml:mo><mml:mn>0.14</mml:mn><mml:mspace /><mml:mi>MeV</mml:mi><mml:mo>/</mml:mo><mml:msup><mml:mi>c</mml:mi><mml:mn>2</mml:mn></mml:msup><mml:mo>,</mml:mo></mml:mtd></mml:mtr><mml:mtr><mml:mtd><mml:maligngroup /><mml:msub><mml:mi>m</mml:mi><mml:mrow><mml:msub><mml:mi>χ</mml:mi><mml:mrow><mml:mi>c</mml:mi><mml:mn>1</mml:mn></mml:mrow></mml:msub><mml:mfenced><mml:mn>3872</mml:mn></mml:mfenced></mml:mrow></mml:msub><mml:mo>−</mml:mo><mml:msub><mml:mi>m</mml:mi><mml:mrow><mml:msub><mml:mi>ψ</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mfenced><mml:mrow><mml:mn>2</mml:mn><mml:mi>S</mml:mi></mml:mrow></mml:mfenced></mml:mrow></mml:msub><mml:mo>=</mml:mo><mml:mn>185.49</mml:mn><mml:mo>±</mml:mo><mml:mn>0.06</mml:mn><mml:mo>±</mml:mo><mml:mn>0.03</mml:mn><mml:mspace /><mml:mi>MeV</mml:mi><mml:mo>/</mml:mo><mml:msup><mml:mi>c</mml:mi><mml:mn>2</mml:mn></mml:msup><mml:mo>,</mml:mo></mml:mtd></mml:mtr></mml:mtable></mml:math></jats:alternatives></jats:disp-formula></jats:p><jats:p>resulting in the most precise determination of the χ<jats:sub>c1</jats:sub>(3872) mass. The width of the ψ<jats:sub>2</jats:sub>(3823) state is found to be below 5.2 MeV at 90% confidence level. The Breit-Wigner width of the χ<jats:sub>c1</jats:sub>(3872) state is measured to be</jats:p><jats:p><jats:disp-formula><jats:alternatives><jats:tex-math>$$ {\Gamma}_{\upchi_{\mathrm{c}1}(3872)}^{\mathrm{BW}}={0.96}_{-0.18}^{+0.19}\pm 0.21\;\mathrm{MeV} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msubsup><mml:mi>Γ</mml:mi><mml:mrow><mml:msub><mml:mi>χ</mml:mi><mml:mrow><mml:mi>c</mml:mi><mml:mn>1</mml:mn></mml:mrow></mml:msub><mml:mfenced><mml:mn>3872</mml:mn></mml:mfenced></mml:mrow><mml:mi>BW</mml:mi></mml:msubsup><mml:mo>=</mml:mo><mml:msubsup><mml:mn>0.96</mml:mn><mml:mrow><mml:mo>−</mml:mo><mml:mn>0.18</mml:mn></mml:mrow><mml:mrow><mml:mo>+</mml:mo><mml:mn>0.19</mml:mn></mml:mrow></mml:msubsup><mml:mo>±</mml:mo><mml:mn>0.21</mml:mn><mml:mspace /><mml:mi>MeV</mml:mi></mml:math></jats:alternatives></jats:disp-formula></jats:p><jats:p>which is inconsistent with zero by 5.5 standard deviations.</jats:p>

Item Type:	Article
Uncontrolled Keywords:	B physics, Branching fraction, Hadron-Hadron scattering (experiments), Quarkonium, Spectroscopy
Depositing User:	Symplectic Admin
Date Deposited:	28 Sep 2020 09:00
Last Modified:	14 Mar 2024 23:09
DOI:	10.1007/JHEP08(2020)123
Open Access URL:	http://doi.org/10.1007/JHEP08(2020)123
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3102833