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Aaij, R, Abdelmotteleb, ASW, Abellan Beteta, C, Abudinén, F, Ackernley, T, Adeva, B, Adinolfi, M, Adlarson, P, Afsharnia, H, Agapopoulou, C et al (show 1051 more authors) , Aidala, CA, Ajaltouni, Z, Akar, S, Akiba, K, Albicocco, P, Albrecht, J, Alessio, F, Alexander, M, Alfonso Albero, A, Aliouche, Z, Alvarez Cartelle, P, Amalric, R, Amato, S, Amey, JL, Amhis, Y, An, L, Anderlini, L, Andersson, M, Andreianov, A, Andreotti, M, Andreou, D, Ao, D, Archilli, F, Artamonov, A, Artuso, M, Aslanides, E, Atzeni, M, Audurier, B, Bachiller Perea, IB, Bachmann, S, Bachmayer, M, Back, JJ, Bailly-reyre, A, Baladron Rodriguez, P, Balagura, V, Baldini, W, Baptista de Souza Leite, J, Barbetti, M, Barlow, RJ, Barsuk, S, Barter, W, Bartolini, M, Baryshnikov, F, Basels, JM, Bassi, G, Batsukh, B, Battig, A, Bay, A, Beck, A, Becker, M, Bedeschi, F, Bediaga, IB, Beiter, A, Belin, S, Bellee, V, Belous, K, Belov, I, Belyaev, I, Benane, G, Bencivenni, G, Ben-Haim, E, Berezhnoy, A, Bernet, R, Bernet Andres, S, Berninghoff, D, Bernstein, HC, Bertella, C, Bertolin, A, Betancourt, C, Betti, F, Bezshyiko, Ia, Bhom, J, Bian, L, Bieker, MS, Biesuz, NV, Billoir, P, Biolchini, A, Birch, M, Bishop, FCR, Bitadze, A, Bizzeti, A, Blago, MP, Blake, T, Blanc, F, Blank, JE, Blusk, S, Bobulska, D, Bocharnikov, VB, Boelhauve, JA, Boente Garcia, O, Boettcher, T, Boldyrev, A, Bolognani, CS, Bolzonella, R, Bondar, N, Borgato, F, Borghi, S, Borsato, M, Borsuk, JT, Bouchiba, SA, Bowcock, TJV, Boyer, A, Bozzi, C, Bradley, MJ, Braun, S, Brea Rodriguez, A, Brodzicka, J, Brossa Gonzalo, A, Brown, J, Brundu, D, Buonaura, A, Buonincontri, L, Burke, AT 
ORCID: 0000-0003-0243-0517, Burr, C, Bursche, A, Butkevich, A, Butter, JS, Buytaert, J, Byczynski, W, Cadeddu, S, Cai, H, Calabrese, R, Calefice, L, Cali, S, Calvi, M, Calvo Gomez, M, Campana, P, Campora Perez, DH, Campoverde Quezada, AF, Capelli, S, Capriotti, L, Carbone, A, Cardinale, R, Cardini, A, Carniti, P, Carus, L, Casais Vidal, A, Caspary, R, Casse, G ORCID: 0000-0002-8516-237X, Cattaneo, M, Cavallero, G, Cavallini, V, Celani, S, Cerasoli, J, Cervenkov, D, Chadwick, AJ, Chahrour, I, Chapman, MG, Charles, M, Charpentier, Ph, Chavez Barajas, CA, Chefdeville, M, Chen, C, Chen, S, Chernov, A, Chernyshenko, S, Chobanova, V, Cholak, S, Chrzaszcz, M, Chubykin, A, Chulikov, V, Ciambrone, P, Cicala, MF, Cid Vidal, X, Ciezarek, G, Cifra, P, Ciullo, G, Clarke, PEL, Clemencic, M, Cliff, HV, Closier, J, Cobbledick, JL, Coco, V, Cogan, J, Cogneras, E, Cojocariu, L, Collins, P, Colombo, T, Congedo, L, Contu, A, Cooke, N, Corredoira, I, Corti, G, Couturier, B, Craik, DC, Cruz Torres, M, Currie, R, Da Silva, CL, Dadabaev, S, Dai, L, Dai, X, Dall’Occo, E, Dalseno, J, D’Ambrosio, C, Daniel, J, Danilina, A, d’Argent, P, Davies, JE, Davis, A, De Aguiar Francisco, O, de Boer, J, De Bruyn, K, De Capua, S, De Cian, M, De Freitas Carneiro Da Graca, U, De Lucia, E, De Miranda, JM, De Paula, L, De Serio, M, De Simone, D, De Simone, P, De Vellis, F, de Vries, JA, Dean, CT, Debernardis, F, Decamp, D, Dedu, V, Del Buono, L, Delaney, B, Dembinski, H-P, Denysenko, V, Deschamps, O, Dettori, F, Dey, B, Di Nezza, P, Diachkov, I, Didenko, S, Dieste Maronas, L, Ding, S, Dobishuk, V, Dolmatov, A, Dong, C, Donohoe, AM, Dordei, F, dos Reis, AC, Douglas, L, Downes, AG, Duda, P, Dudek, MW, Dufour, L, Duk, V, Durante, P, Duras, MM, Durham, JM, Dutta, D, Dziurda, A, Dzyuba, A, Easo, S, Egede, U, Egorychev, V, Eirea Orro, C, Eisenhardt, S, Ejopu, E, Ek-In, S, Eklund, L, Elashri, ME, Ellbracht, J, Ely, S, Ene, A, Epple, E, Escher, S, Eschle, J, Esen, S, Evans, T, Fabiano, F, Falcao, LN, Fan, Y, Fang, B, Fantini, L, Faria, M, Farry, S, Fazzini, D, Felkowski, LF, Feo, M, Fernandez Gomez, M, Fernez, AD, Ferrari, F, Ferreira Lopes, L, Ferreira Rodrigues, F, Ferreres Sole, S, Ferrillo, M, Ferro-Luzzi, M, Filippov, S, Fini, RA, Fiorini, M, Firlej, M, Fischer, KM, Fitzgerald, DS, Fitzpatrick, C, Fiutowski, T, Fleuret, F, Fontana, M, Fontanelli, F, Forty, R, Foulds-Holt, D, Franco Lima, V, Franco Sevilla, M, Frank, M, Franzoso, E, Frau, G, Frei, C, Friday, DA, Frontini, L, Fu, J, Fuehring, Q, Fulghesu, T, Gabriel, E, Galati, G, Galati, MD, Gallas Torreira, A, Galli, D, Gambetta, S, Gandelman, M, Gandini, P, Gao, HG, Gao, Y, Gao, Y, Garau, M, Garcia Martin, LM, Garcia Moreno, P, García Pardiñas, J, Garcia Plana, B, Garcia Rosales, FA, Garrido, L, Gaspar, C, Geertsema, RE, Gerick, D, Gerken, LL, Gersabeck, E, Gersabeck, M, Gershon, T, Giambastiani, L, Gibson, V, Giemza, HK, Gilman, AL, Giovannetti, M, Gioventù, A, Gironella Gironell, P, Giugliano, C, Giza, MA, Gizdov, K, Gkougkousis, EL, Gligorov, VV, Göbel, C, Golobardes, E, Golubkov, D, Golutvin, A, Gomes, A, Gomez Fernandez, S, Goncalves Abrantes, F, Goncerz, M, Gong, G, Gorelov, IV, Gotti, C, Grabowski, JP, Grammatico, T, Granado Cardoso, LA, Graugés, E, Graverini, E, Graziani, G, Grecu, AT, Greeven, LM, Grieser, NA, Grillo, L, Gromov, S, Gruberg Cazon, BR, Gu, C, Guarise, M, Guittiere, M, Günther, PA, Gushchin, E, Guth, A, Guz, Y, Gys, T, Hadavizadeh, T, Hadjivasiliou, C, Haefeli, G, Haen, C, Haimberger, J, Haines, SC, Halewood-leagas, T, Halvorsen, MM, Hamilton, PM, Hammerich, J ORCID: 0000-0002-5556-1775, Han, Q, Han, X, Hansmann-Menzemer, S, Hao, L, Harnew, N, Harrison, T, Hasse, C, Hatch, M, He, J, Heijhoff, K, Hemmer, FH, Henderson, C, Henderson, RDL, Hennequin, AM, Hennessy, K, Henry, L, Herd, J, Heuel, J, Hicheur, A, Hill, D, Hilton, M, Hollitt, SE, Horswill, J, Hou, R, Hou, Y, Hu, J, Hu, J, Hu, W, Hu, X, Huang, W, Huang, X, Hulsbergen, W, Hunter, RJ, Hushchyn, M, Hutchcroft, D ORCID: 0000-0002-4174-6509, Ibis, P, Idzik, M, Ilin, D, Ilten, P, Inglessi, A, Iniukhin, A, Ishteev, A, Ivshin, K, Jacobsson, R, Jage, H, Jaimes Elles, SJ, Jakobsen, S, Jans, E, Jashal, BK, Jawahery, A, Jevtic, V, Jiang, E, Jiang, X, Jiang, Y, John, M, Johnson, D, Jones, CR, Jones, TP, Joshi, SJ, Jost, B, Jurik, N, Juszczak, I, Kandybei, S, Kang, Y, Karacson, M, Karpenkov, D, Karpov, M, Kautz, JW, Keizer, F, Keller, DM, Kenzie, M, Ketel, T, Khanji, B, Kharisova, A, Kholodenko, S, Khreich, G, Kirn, T, Kirsebom, VS, Kitouni, O, Klaver, S, Kleijne, N, Klimaszewski, K, Kmiec, MR, Koliiev, S, Kolk, L, Kondybayeva, A, Konoplyannikov, A, Kopciewicz, P, Kopecna, R, Koppenburg, P, Korolev, M, Kostiuk, I, Kot, O, Kotriakhova, S, Kozachuk, A, Kravchenko, P, Kravchuk, L, Kreps, M, Kretzschmar, S, Krokovny, P, Krupa, W, Krzemien, W, Kubat, J, Kubis, S, Kucewicz, W, Kucharczyk, M, Kudryavtsev, V, Kulikova, EK, Kupsc, A, Lacarrere, D, Lafferty, G, Lai, A, Lampis, A, Lancierini, D, Landesa Gomez, C, Lane, JJ, Lane, R, Langenbruch, C, Langer, J, Lantwin, O, Latham, T, Lazzari, F, Lazzeroni, C, Le Gac, R, Lee, SH, Lefèvre, R, Leflat, A, Legotin, S, Lenisa, P, Leroy, O, Lesiak, T, Leverington, B, Li, A, Li, H, Li, K, Li, P, Li, P-R, Li, S, Li, T, Li, T, Li, Y, Li, Z, Liang, X, Lin, C, Lin, T, Lindner, R, Lisovskyi, V, Litvinov, R, Liu, G, Liu, H, Liu, K, Liu, Q, Liu, S, Lobo Salvia, A, Loi, A, Lollini, R, Lomba Castro, J, Longstaff, I, Lopes, JH, Lopez Huertas, A, López Soliño, S, Lovell, GH, Lu, Y, Lucarelli, C, Lucchesi, D, Luchuk, S, Lucio Martinez, M, Lukashenko, V, Luo, Y, Lupato, A, Luppi, E, Lusiani, A, Lynch, K, Lyu, X-R, Ma, R, Maccolini, S, Machefert, F, Maciuc, F, Mackay, I, Macko, V, Madhan Mohan, LR, Maevskiy, A, Maisuzenko, D, Majewski, MW, Malczewski, JJ, Malde, S, Malecki, B, Malinin, A, Maltsev, T, Manca, G, Mancinelli, G, Mancuso, C, Manera Escalero, R, Manuzzi, D, Manzari, CA, Marangotto, D, Marchand, JF, Marconi, U, Mariani, S, Marin Benito, C, Marks, J, Marshall, AM, Marshall, PJ, Martelli, G, Martellotti, G, Martinazzoli, L, Martinelli, M, Martinez Santos, D, Martinez Vidal, F, Massafferri, A, Materok, M, Matev, R, Mathad, A, Matiunin, V, Matteuzzi, C, Mattioli, KR, Mauri, A, Maurice, E, Mauricio, J, Mazurek, M, McCann, M, Mcconnell, L, McGrath, TH, McHugh, NT, McNab, A, McNulty, R, Meadows, B, Meier, G, Melnychuk, D, Meloni, S, Merk, M, Merli, A, Meyer Garcia, L, Miao, D, Miao, H, Mikhasenko, M, Milanes, DA, Millard, E, Milovanovic, M, Minard, M-N, Minotti, A, Minucci, E, Miralles, T, Mitchell, SE, Mitreska, B, Mitzel, DS, Modak, A, Mödden, A, Mohammed, RA, Moise, RD, Mokhnenko, S, Mombächer, T, Monk, M, Monroy, IA, Monteil, S, Morello, G, Morello, MJ, Morgenthaler, MP, Moron, J, Morris, AB, Morris, AG, Mountain, R, Mu, H, Muhammad, E, Muheim, F, Mulder, M, Müller, K, Murphy, CH, Murray, D, Murta, R, Muzzetto, P, Naik, P, Nakada, T, Nandakumar, R, Nanut, T, Nasteva, I, Needham, M, Neri, N, Neubert, S, Neufeld, N, Neustroev, P, Newcombe, R, Nicolini, J, Nicotra, D, Niel, EM, Nieswand, S, Nikitin, N, Nolte, NS, Normand, C, Novoa Fernandez, J, Nowak, GN, Nunez, C, Oblakowska-Mucha, A, Obraztsov, V, Oeser, T, Okamura, S, Oldeman, R, Oliva, F, Onderwater, CJG, O’Neil, RH, Otalora Goicochea, JM, Ovsiannikova, T, Owen, P, Oyanguren, A, Ozcelik, O, Padeken, KO, Pagare, B, Pais, PR, Pajero, T, Palano, A, Palutan, M, Panshin, G, Paolucci, L, Papanestis, A, Pappagallo, M, Pappalardo, LL, Pappenheimer, C, Parker, W, Parkes, C, Passalacqua, B, Passaleva, G, Pastore, A, Patel, M, Patrignani, C, Pawley, CJ, Pellegrino, A, Pepe Altarelli, M, Perazzini, S, Pereima, D, Pereiro Castro, A, Perret, P, Petridis, K, Petrolini, A, Petrucci, S, Petruzzo, M, Pham, H, Philippov, A, Piandani, R, Pica, L, Piccini, M, Pietrzyk, B, Pietrzyk, G, Pili, M, Pinci, D, Pisani, F, Pizzichemi, M, Placinta, V, Plews, J, Plo Casasus, M, Polci, F, Poli Lener, M, Poluektov, A, Polukhina, N, Polyakov, I, Polycarpo, E, Ponce, S, Popov, D, Poslavskii, S, Prasanth, K, Promberger, L, Prouve, C, Pugatch, V, Puill, V, Punzi, G, Qi, HR, Qian, W, Qin, N, Qu, S, Quagliani, R, Raab, NV, Rachwal, B, Rademacker, JH, Rajagopalan, R, Rama, M, Ramos Pernas, M, Rangel, MS, Ratnikov, F, Raven, G, Rebollo De Miguel, M, Redi, F, Reich, J, Reiss, F, Remon Alepuz, C, Ren, Z, Resmi, PK, Ribatti, R, Ricci, AM, Ricciardi, S, Richardson, K, Richardson-Slipper, M, Rinnert, K, Robbe, P, Robertson, G, Rodrigues, E, Rodriguez Fernandez, E, Rodriguez Lopez, JA, Rodriguez Rodriguez, E, Rolf, DL, Rollings, A, Roloff, P, Romanovskiy, V, Romero Lamas, M, Romero Vidal, A, Roth, JD, Rotondo, M, Rudolph, MS, Ruf, T, Ruiz Fernandez, RA, Ruiz Vidal, J, Ryzhikov, A, Ryzka, J, Saborido Silva, JJ, Sagidova, N, Sahoo, N, Saitta, B, Salomoni, M, Sanchez Gras, C, Sanderswood, I, Santacesaria, R, Santamarina Rios, C, Santimaria, M, Santovetti, E, Saranin, D, Sarpis, G, Sarpis, M, Sarti, A, Satriano, C, Satta, A, Saur, M, Savrina, D, Sazak, H, Scantlebury Smead, LG, Scarabotto, A, Schael, S, Scherl, S ORCID: 0000-0003-0528-2724, Schertz, AM, Schiller, M, Schindler, H, Schmelling, M, Schmidt, B, Schmitt, S, Schneider, O, Schopper, A, Schubiger, M, Schulte, N, Schulte, S, Schune, MH, Schwemmer, R, Sciascia, B, Sciuccati, A, Sellam, S, Semennikov, A, Senghi Soares, M, Sergi, A, Serra, N, Sestini, L, Seuthe, A, Shang, Y, Shangase, DM, Shapkin, M, Shchemerov, I, Shchutska, L, Shears, T ORCID: 0000-0002-2653-1366, Shekhtman, L, Shen, Z, Sheng, S, Shevchenko, V, Shi, B, Shields, EB, Shimizu, Y, Shmanin, E, Shorkin, R, Shupperd, JD, Siddi, BG, Silva Coutinho, R, Simi, G, Simone, S, Singla, M, Skidmore, N, Skuza, R, Skwarnicki, T, Slater, MW, Smallwood, JC, Smeaton, JG, Smith, E, Smith, K, Smith, M, Snoch, A, Soares Lavra, L, Sokoloff, MD, Soler, FJP, Solomin, A, Solovev, A, Solovyev, I, Song, R, Souza De Almeida, FL, Souza De Paula, B, Spaan, B, Spadaro Norella, E, Spedicato, E, Speer, JG, Spiridenkov, E, Spradlin, P, Sriskaran, V, Stagni, F, Stahl, M, Stahl, S, Stanislaus, S, Stein, EN, Steinkamp, O, Stenyakin, O, Stevens, H, Strekalina, D, Su, YS, Suljik, F, Sun, J, Sun, L, Sun, Y, Swallow, PN, Swientek, K, Szabelski, A, Szumlak, T, Szymanski, M, Tan, Y, Taneja, S, Tat, MD, Terentev, A, Teubert, F, Thomas, E, Thompson, DJD, Tilquin, H, Tisserand, V, T’Jampens, S, Tobin, M, Tomassetti, L, Tonani, G, Tong, X, Torres Machado, D, Tou, DY, Trippl, C, Tuci, G, Tuning, N, Ukleja, A, Unverzagt, DJ, Usachov, A, Ustyuzhanin, A, Uwer, U, Vagnoni, V, Valassi, A, Valenti, G, Valls Canudas, N, Van Dijk, M, Van Hecke, H, van Herwijnen, E, Van Hulse, CB, van Veghel, M, Vazquez Gomez, R, Vazquez Regueiro, P, Vázquez Sierra, C, Vecchi, S, Velthuis, JJ, Veltri, M, Venkateswaran, A, Veronesi, M, Vesterinen, M, Vieira, D, Vieites Diaz, M, Vilasis-Cardona, X, Vilella Figueras, E, Villa, A, Vincent, P, Volle, FC, vom Bruch, D, Vorobyev, V, Voropaev, N, Vos, K, Vrahas, C, Walsh, J, Walton, EJ, Wan, G, Wang, C, Wang, G, Wang, J, Wang, J, Wang, J, Wang, J, Wang, M, Wang, R, Wang, 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(2023)
Observation of the $$ {\textrm{B}}_{\textrm{s}}^0 $$ → χc1(3872)π+π− decay.
Journal of High Energy Physics, 2023 (7).
84-.
ISSN 1126-6708, 1029-8479
Access the full-text of this item by clicking on the
Open Access link.
Abstract
<jats:title>A<jats:sc>bstract</jats:sc>
</jats:title><jats:p>The first observation of the <jats:inline-formula><jats:alternatives><jats:tex-math>$$ {B}_s^0 $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:msubsup>
<mml:mi>B</mml:mi>
<mml:mi>s</mml:mi>
<mml:mn>0</mml:mn>
</mml:msubsup>
</mml:math></jats:alternatives></jats:inline-formula><jats:italic>→</jats:italic> (<jats:italic>χ</jats:italic><jats:sub><jats:italic>c</jats:italic>1</jats:sub>(3872) <jats:italic>→ J/ψπ</jats:italic><jats:sup>+</jats:sup><jats:italic>π</jats:italic><jats:sup><jats:italic>−</jats:italic></jats:sup>)<jats:italic>π</jats:italic><jats:sup>+</jats:sup><jats:italic>π</jats:italic><jats:sup><jats:italic>−</jats:italic></jats:sup> decay is reported using proton-proton collision data, corresponding to integrated luminosities of 1, 2 and 6 fb<jats:sup><jats:italic>−</jats:italic>1</jats:sup>, collected by the LHCb experiment at centre-of-mass energies of 7, 8 and 13 TeV, respectively. The ratio of branching fractions relative to the <jats:inline-formula><jats:alternatives><jats:tex-math>$$ {B}_s^0 $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:msubsup>
<mml:mi>B</mml:mi>
<mml:mi>s</mml:mi>
<mml:mn>0</mml:mn>
</mml:msubsup>
</mml:math></jats:alternatives></jats:inline-formula><jats:italic>→</jats:italic> (<jats:italic>ψ</jats:italic>(2<jats:italic>S</jats:italic>) <jats:italic>→ J/ψπ</jats:italic><jats:sup>+</jats:sup><jats:italic>π</jats:italic><jats:sup><jats:italic>−</jats:italic></jats:sup>)<jats:italic>π</jats:italic><jats:sup>+</jats:sup><jats:italic>π</jats:italic><jats:sup><jats:italic>−</jats:italic></jats:sup> decay is measured to be<jats:disp-formula><jats:alternatives><jats:tex-math>$$ \frac{\mathcal{B}\left({B}_s^0\to {\chi}_{c1}(3872){\pi}^{+}{\pi}^{-}\right)\times \mathcal{B}\left({\chi}_{c1}(3872)\to J/\psi {\pi}^{+}{\pi}^{-}\right)}{\mathcal{B}\left({B}_s^0\to \psi (2S){\pi}^{+}{\pi}^{-}\right)\times \mathcal{B}\left(\psi (2S)\to J/\psi {\pi}^{+}{\pi}^{-}\right)}=\left(6.8\pm 1.1\pm 0.2\right)\times {10}^{-2}, $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mfrac>
<mml:mrow>
<mml:mi>B</mml:mi>
<mml:mfenced>
<mml:mrow>
<mml:msubsup>
<mml:mi>B</mml:mi>
<mml:mi>s</mml:mi>
<mml:mn>0</mml:mn>
</mml:msubsup>
<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>π</mml:mi>
<mml:mo>+</mml:mo>
</mml:msup>
<mml:msup>
<mml:mi>π</mml:mi>
<mml:mo>−</mml:mo>
</mml:msup>
</mml:mrow>
</mml:mfenced>
<mml:mo>×</mml:mo>
<mml:mi>B</mml:mi>
<mml:mfenced>
<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:mi>ψ</mml:mi>
<mml:msup>
<mml:mi>π</mml:mi>
<mml:mo>+</mml:mo>
</mml:msup>
<mml:msup>
<mml:mi>π</mml:mi>
<mml:mo>−</mml:mo>
</mml:msup>
</mml:mrow>
</mml:mfenced>
</mml:mrow>
<mml:mrow>
<mml:mi>B</mml:mi>
<mml:mfenced>
<mml:mrow>
<mml:msubsup>
<mml:mi>B</mml:mi>
<mml:mi>s</mml:mi>
<mml:mn>0</mml:mn>
</mml:msubsup>
<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>π</mml:mi>
<mml:mo>+</mml:mo>
</mml:msup>
<mml:msup>
<mml:mi>π</mml:mi>
<mml:mo>−</mml:mo>
</mml:msup>
</mml:mrow>
</mml:mfenced>
<mml:mo>×</mml:mo>
<mml:mi>B</mml:mi>
<mml:mfenced>
<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:mi>ψ</mml:mi>
<mml:msup>
<mml:mi>π</mml:mi>
<mml:mo>+</mml:mo>
</mml:msup>
<mml:msup>
<mml:mi>π</mml:mi>
<mml:mo>−</mml:mo>
</mml:msup>
</mml:mrow>
</mml:mfenced>
</mml:mrow>
</mml:mfrac>
<mml:mo>=</mml:mo>
<mml:mfenced>
<mml:mrow>
<mml:mn>6.8</mml:mn>
<mml:mo>±</mml:mo>
<mml:mn>1.1</mml:mn>
<mml:mo>±</mml:mo>
<mml:mn>0.2</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:math></jats:alternatives></jats:disp-formula></jats:p><jats:p>where the first uncertainty is statistical and the second systematic. The mass spectrum of the <jats:italic>π</jats:italic><jats:sup>+</jats:sup><jats:italic>π</jats:italic><jats:sup><jats:italic>−</jats:italic></jats:sup> system recoiling against the <jats:italic>χ</jats:italic><jats:sub><jats:italic>c</jats:italic>1</jats:sub>(3872) meson exhibits a large contribution from <jats:inline-formula><jats:alternatives><jats:tex-math>$$ {B}_s^0 $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:msubsup>
<mml:mi>B</mml:mi>
<mml:mi>s</mml:mi>
<mml:mn>0</mml:mn>
</mml:msubsup>
</mml:math></jats:alternatives></jats:inline-formula><jats:italic>→ χ</jats:italic><jats:sub><jats:italic>c</jats:italic>1</jats:sub>(3872) (<jats:italic>f</jats:italic><jats:sub>0</jats:sub>(980) <jats:italic>→ π</jats:italic><jats:sup>+</jats:sup><jats:italic>π</jats:italic><jats:sup><jats:italic>−</jats:italic></jats:sup>) decays.</jats:p>
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