Display options
Share it on

Phys Rev Lett. 2017 Dec 01;119(22):221801. doi: 10.1103/PhysRevLett.119.221801. Epub 2017 Nov 28.

χ_{c1} and χ_{c2} Resonance Parameters with the Decays χ_{c1,c2}→J/ψμ^{+}μ^{-}.

Physical review letters

R Aaij, B Adeva, M Adinolfi, Z Ajaltouni, S Akar, J Albrecht, F Alessio, M Alexander, A Alfonso Albero, S Ali, G Alkhazov, P Alvarez Cartelle, A A Alves, S Amato, S Amerio, Y Amhis, L An, L Anderlini, G Andreassi, M Andreotti, J E Andrews, R B Appleby, F Archilli, P d'Argent, J Arnau Romeu, A Artamonov, M Artuso, E Aslanides, M Atzeni, G Auriemma, M Baalouch, I Babuschkin, S Bachmann, J J Back, A Badalov, C Baesso, S Baker, V Balagura, W Baldini, A Baranov, R J Barlow, C Barschel, S Barsuk, W Barter, F Baryshnikov, V Batozskaya, V Battista, A Bay, L Beaucourt, J Beddow, F Bedeschi, I Bediaga, A Beiter, L J Bel, N Beliy, V Bellee, N Belloli, K Belous, I Belyaev, E Ben-Haim, G Bencivenni, S Benson, S Beranek, A Berezhnoy, R Bernet, D Berninghoff, E Bertholet, A Bertolin, C Betancourt, F Betti, M-O Bettler, M van Beuzekom, Ia Bezshyiko, S Bifani, P Billoir, A Birnkraut, A Bizzeti, M Bjørn, T Blake, F Blanc, S Blusk, V Bocci, T Boettcher, A Bondar, N Bondar, I Bordyuzhin, S Borghi, M Borisyak, M Borsato, F Bossu, M Boubdir, T J V Bowcock, E Bowen, C Bozzi, S Braun, T Britton, J Brodzicka, D Brundu, E Buchanan, C Burr, A Bursche, J Buytaert, W Byczynski, S Cadeddu, H Cai, R Calabrese, R Calladine, M Calvi, M Calvo Gomez, A Camboni, P Campana, D H Campora Perez, L Capriotti, A Carbone, G Carboni, R Cardinale, A Cardini, P Carniti, L Carson, K Carvalho Akiba, G Casse, L Cassina, M Cattaneo, G Cavallero, R Cenci, D Chamont, M G Chapman, M Charles, Ph Charpentier, G Chatzikonstantinidis, M Chefdeville, S Chen, S F Cheung, S-G Chitic, V Chobanova, M Chrzaszcz, A Chubykin, P Ciambrone, X Cid Vidal, G Ciezarek, P E L Clarke, M Clemencic, H V Cliff, J Closier, J Cogan, E Cogneras, V Cogoni, L Cojocariu, P Collins, T Colombo, A Comerma-Montells, A Contu, A Cook, G Coombs, S Coquereau, G Corti, M Corvo, C M Costa Sobral, B Couturier, G A Cowan, D C Craik, A Crocombe, M Cruz Torres, R Currie, C D'Ambrosio, F Da Cunha Marinho, E Dall'Occo, J Dalseno, A Davis, O De Aguiar Francisco, S De Capua, M De Cian, J M De Miranda, L De Paula, M De Serio, P De Simone, C T Dean, D Decamp, L Del Buono, H-P Dembinski, M Demmer, A Dendek, D Derkach, O Deschamps, F Dettori, B Dey, A Di Canto, P Di Nezza, H Dijkstra, F Dordei, M Dorigo, A Dosil Suárez, L Douglas, A Dovbnya, K Dreimanis, L Dufour, G Dujany, P Durante, R Dzhelyadin, M Dziewiecki, A Dziurda, A Dzyuba, S Easo, M Ebert, U Egede, V Egorychev, S Eidelman, S Eisenhardt, U Eitschberger, R Ekelhof, L Eklund, S Ely, S Esen, H M Evans, T Evans, A Falabella, N Farley, S Farry, D Fazzini, L Federici, D Ferguson, G Fernandez, P Fernandez Declara, A Fernandez Prieto, F Ferrari, F Ferreira Rodrigues, M Ferro-Luzzi, S Filippov, R A Fini, M Fiorini, M Firlej, C Fitzpatrick, T Fiutowski, F Fleuret, K Fohl, M Fontana, F Fontanelli, D C Forshaw, R Forty, V Franco Lima, M Frank, C Frei, J Fu, W Funk, E Furfaro, C Färber, E Gabriel, A Gallas Torreira, D Galli, S Gallorini, S Gambetta, M Gandelman, P Gandini, Y Gao, L M Garcia Martin, J García Pardiñas, J Garra Tico, L Garrido, P J Garsed, D Gascon, C Gaspar, L Gavardi, G Gazzoni, D Gerick, E Gersabeck, M Gersabeck, T Gershon, Ph Ghez, S Gianì, V Gibson, O G Girard, L Giubega, K Gizdov, V V Gligorov, D Golubkov, A Golutvin, A Gomes, I V Gorelov, C Gotti, E Govorkova, J P Grabowski, R Graciani Diaz, L A Granado Cardoso, E Graugés, E Graverini, G Graziani, A Grecu, R Greim, P Griffith, L Grillo, L Gruber, B R Gruberg Cazon, O Grünberg, E Gushchin, Yu Guz, T Gys, C Göbel, T Hadavizadeh, C Hadjivasiliou, G Haefeli, C Haen, S C Haines, B Hamilton, X Han, T H Hancock, S Hansmann-Menzemer, N Harnew, S T Harnew, C Hasse, M Hatch, J He, M Hecker, K Heinicke, A Heister, K Hennessy, P Henrard, L Henry, E van Herwijnen, M Heß, A Hicheur, D Hill, C Hombach, P H Hopchev, W Hu, Z C Huard, W Hulsbergen, T Humair, M Hushchyn, D Hutchcroft, P Ibis, M Idzik, P Ilten, R Jacobsson, J Jalocha, E Jans, A Jawahery, F Jiang, M John, D Johnson, C R Jones, C Joram, B Jost, N Jurik, S Kandybei, M Karacson, J M Kariuki, S Karodia, N Kazeev, M Kecke, F Keizer, M Kelsey, M Kenzie, T Ketel, E Khairullin, B Khanji, C Khurewathanakul, T Kirn, S Klaver, K Klimaszewski, T Klimkovich, S Koliiev, M Kolpin, R Kopecna, P Koppenburg, A Kosmyntseva, S Kotriakhova, M Kozeiha, L Kravchuk, M Kreps, F Kress, P Krokovny, F Kruse, W Krzemien, W Kucewicz, M Kucharczyk, V Kudryavtsev, A K Kuonen, T Kvaratskheliya, D Lacarrere, G Lafferty, A Lai, G Lanfranchi, C Langenbruch, T Latham, C Lazzeroni, R Le Gac, A Leflat, J Lefrançois, R Lefèvre, F Lemaitre, E Lemos Cid, O Leroy, T Lesiak, B Leverington, P-R Li, T Li, Y Li, Z Li, T Likhomanenko, R Lindner, F Lionetto, V Lisovskyi, X Liu, D Loh, A Loi, I Longstaff, J H Lopes, D Lucchesi, A Luchinsky, M Lucio Martinez, H Luo, A Lupato, E Luppi, O Lupton, A Lusiani, X Lyu, F Machefert, F Maciuc, V Macko, P Mackowiak, S Maddrell-Mander, O Maev, K Maguire, D Maisuzenko, M W Majewski, S Malde, B Malecki, A Malinin, T Maltsev, G Manca, G Mancinelli, D Marangotto, J Maratas, J F Marchand, U Marconi, C Marin Benito, M Marinangeli, P Marino, J Marks, G Martellotti, M Martin, M Martinelli, D Martinez Santos, F Martinez Vidal, L M Massacrier, A Massafferri, R Matev, A Mathad, Z Mathe, C Matteuzzi, A Mauri, E Maurice, B Maurin, A Mazurov, M McCann, A McNab, R McNulty, J V Mead, B Meadows, C Meaux, F Meier, N Meinert, D Melnychuk, M Merk, A Merli, E Michielin, D A Milanes, E Millard, M-N Minard, L Minzoni, D S Mitzel, A Mogini, J Molina Rodriguez, T Mombächer, I A Monroy, S Monteil, M Morandin, M J Morello, O Morgunova, J Moron, A B Morris, R Mountain, F Muheim, M Mulder, D Müller, J Müller, K Müller, V Müller, P Naik, T Nakada, R Nandakumar, A Nandi, I Nasteva, M Needham, N Neri, S Neubert, N Neufeld, M Neuner, T D Nguyen, C Nguyen-Mau, S Nieswand, R Niet, N Nikitin, T Nikodem, A Nogay, D P O'Hanlon, A Oblakowska-Mucha, V Obraztsov, S Ogilvy, R Oldeman, C J G Onderwater, A Ossowska, J M Otalora Goicochea, P Owen, A Oyanguren, P R Pais, A Palano, M Palutan, A Papanestis, M Pappagallo, L L Pappalardo, W Parker, C Parkes, G Passaleva, A Pastore, M Patel, C Patrignani, A Pearce, A Pellegrino, G Penso, M Pepe Altarelli, S Perazzini, P Perret, L Pescatore, K Petridis, A Petrolini, A Petrov, M Petruzzo, E Picatoste Olloqui, B Pietrzyk, M Pikies, D Pinci, F Pisani, A Pistone, A Piucci, V Placinta, S Playfer, M Plo Casasus, F Polci, M Poli Lener, A Poluektov, I Polyakov, E Polycarpo, G J Pomery, S Ponce, A Popov, D Popov, S Poslavskii, C Potterat, E Price, J Prisciandaro, C Prouve, V Pugatch, A Puig Navarro, H Pullen, G Punzi, W Qian, R Quagliani, B Quintana, B Rachwal, J H Rademacker, M Rama, M Ramos Pernas, M S Rangel, I Raniuk, F Ratnikov, G Raven, M Ravonel Salzgeber, M Reboud, F Redi, S Reichert, A C Dos Reis, C Remon Alepuz, V Renaudin, S Ricciardi, S Richards, M Rihl, K Rinnert, V Rives Molina, P Robbe, A Robert, A B Rodrigues, E Rodrigues, J A Rodriguez Lopez, A Rogozhnikov, S Roiser, A Rollings, V Romanovskiy, A Romero Vidal, J W Ronayne, M Rotondo, M S Rudolph, T Ruf, P Ruiz Valls, J Ruiz Vidal, J J Saborido Silva, E Sadykhov, N Sagidova, B Saitta, V Salustino Guimaraes, C Sanchez Mayordomo, B Sanmartin Sedes, R Santacesaria, C Santamarina Rios, M Santimaria, E Santovetti, G Sarpis, A Sarti, C Satriano, A Satta, D M Saunders, D Savrina, S Schael, M Schellenberg, M Schiller, H Schindler, M Schmelling, T Schmelzer, B Schmidt, O Schneider, A Schopper, H F Schreiner, M Schubiger, M-H Schune, R Schwemmer, B Sciascia, A Sciubba, A Semennikov, E S Sepulveda, A Sergi, N Serra, J Serrano, L Sestini, P Seyfert, M Shapkin, I Shapoval, Y Shcheglov, T Shears, L Shekhtman, V Shevchenko, B G Siddi, R Silva Coutinho, L Silva de Oliveira, G Simi, S Simone, M Sirendi, N Skidmore, T Skwarnicki, E Smith, I T Smith, J Smith, M Smith, L Soares Lavra, M D Sokoloff, F J P Soler, B Souza De Paula, B Spaan, P Spradlin, S Sridharan, F Stagni, M Stahl, S Stahl, P Stefko, S Stefkova, O Steinkamp, S Stemmle, O Stenyakin, M Stepanova, H Stevens, S Stone, B Storaci, S Stracka, M E Stramaglia, M Straticiuc, U Straumann, J Sun, L Sun, W Sutcliffe, K Swientek, V Syropoulos, T Szumlak, M Szymanski, S T'Jampens, A Tayduganov, T Tekampe, G Tellarini, F Teubert, E Thomas, J van Tilburg, M J Tilley, V Tisserand, M Tobin, S Tolk, L Tomassetti, D Tonelli, F Toriello, R Tourinho Jadallah Aoude, E Tournefier, M Traill, M T Tran, M Tresch, A Trisovic, A Tsaregorodtsev, P Tsopelas, A Tully, N Tuning, A Ukleja, A Usachov, A Ustyuzhanin, U Uwer, C Vacca, A Vagner, V Vagnoni, A Valassi, S Valat, G Valenti, R Vazquez Gomez, P Vazquez Regueiro, S Vecchi, M van Veghel, J J Velthuis, M Veltri, G Veneziano, A Venkateswaran, T A Verlage, M Vernet, M Vesterinen, J V Viana Barbosa, B Viaud, D Vieira, M Vieites Diaz, H Viemann, X Vilasis-Cardona, M Vitti, V Volkov, A Vollhardt, B Voneki, A Vorobyev, V Vorobyev, C Voß, J A de Vries, C Vázquez Sierra, R Waldi, C Wallace, R Wallace, J Walsh, J Wang, D R Ward, H M Wark, N K Watson, D Websdale, A Weiden, C Weisser, M Whitehead, J Wicht, G Wilkinson, M Wilkinson, M Williams, M P Williams, M Williams, T Williams, F F Wilson, J Wimberley, M Winn, J Wishahi, W Wislicki, M Witek, G Wormser, S A Wotton, K Wraight, K Wyllie, Y Xie, M Xu, Z Xu, Z Yang, Z Yang, Y Yao, H Yin, J Yu, X Yuan, O Yushchenko, K A Zarebski, M Zavertyaev, L Zhang, Y Zhang, A Zhelezov, Y Zheng, X Zhu, V Zhukov, J B Zonneveld, S Zucchelli,

Affiliations

  1. European Organization for Nuclear Research (CERN), Geneva, Switzerland.
  2. Universidad de Santiago de Compostela, Santiago de Compostela, Spain.
  3. H.H. Wills Physics Laboratory, University of Bristol, Bristol, United Kingdom.
  4. Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand, France.
  5. University of Cincinnati, Cincinnati, Ohio, USA.
  6. Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany.
  7. School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom.
  8. ICCUB, Universitat de Barcelona, Barcelona, Spain.
  9. Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands.
  10. Petersburg Nuclear Physics Institute (PNPI), Gatchina, Russia.
  11. Imperial College London, London, United Kingdom.
  12. Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil.
  13. Sezione INFN di Padova, Padova, Italy.
  14. LAL, Université Paris-Sud, CNRS/IN2P3, Orsay, France.
  15. Center for High Energy Physics, Tsinghua University, Beijing, China.
  16. Sezione INFN di Firenze, Firenze, Italy.
  17. Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
  18. Universita e INFN, Ferrara, Ferrara, Italy.
  19. University of Maryland, College Park, Maryland, USA.
  20. School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom.
  21. Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany.
  22. Aix Marseille Univ, CNRS/IN2P3, CPPM, Marseille, France.
  23. Institute for High Energy Physics (IHEP), Protvino, Russia.
  24. Syracuse University, Syracuse, New York, United States.
  25. Physik-Institut, Universität Zürich, Zürich, Switzerland.
  26. Sezione INFN di Roma La Sapienza, Roma, Italy.
  27. Department of Physics, University of Warwick, Coventry, United Kingdom.
  28. Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Rio de Janeiro, Brazil (associated with Institution Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil).
  29. Yandex School of Data Analysis, Moscow, Russia.
  30. Institute of Theoretical and Experimental Physics (ITEP), Moscow, Russia.
  31. National Center for Nuclear Research (NCBJ), Warsaw, Poland.
  32. LAPP, Université Savoie Mont-Blanc, CNRS/IN2P3, Annecy-Le-Vieux, France.
  33. Sezione INFN di Pisa, Pisa, Italy.
  34. Centro Brasileiro de Pesquisas Físicas (CBPF), Rio de Janeiro, Brazil.
  35. University of Chinese Academy of Sciences, Beijing, China (associated with Institution Center for High Energy Physics, Tsinghua University, Beijing, China).
  36. Universita e INFN, Milano-Bicocca, Milano, Italy.
  37. LPNHE, Université Pierre et Marie Curie, Université Paris Diderot, CNRS/IN2P3, Paris, France.
  38. Laboratori Nazionali dell'INFN di Frascati, Frascati, Italy.
  39. I. Physikalisches Institut, RWTH Aachen University, Aachen, Germany.
  40. Institute of Nuclear Physics, Moscow State University (SINP MSU), Moscow, Russia.
  41. Sezione INFN di Bologna, Bologna, Italy.
  42. University of Birmingham, Birmingham, United Kingdom.
  43. Department of Physics, University of Oxford, Oxford, United Kingdom.
  44. Massachusetts Institute of Technology, Cambridge, Massachusetts, USA.
  45. Budker Institute of Nuclear Physics (SB RAS), Novosibirsk, Russia.
  46. Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom.
  47. Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland.
  48. Sezione INFN di Cagliari, Cagliari, Italy.
  49. School of Physics and Technology, Wuhan University, Wuhan, China (associated with Institution Center for High Energy Physics, Tsinghua University, Beijing, China).
  50. Sezione INFN di Roma Tor Vergata, Roma, Italy.
  51. Sezione INFN di Genova, Genova, Italy.
  52. School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom.
  53. Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom.
  54. Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania.
  55. Sezione INFN di Bari, Bari, Italy.
  56. Max-Planck-Institut für Kernphysik (MPIK), Heidelberg, Germany.
  57. AGH - University of Science and Technology, Faculty of Physics and Applied Computer Science, Kraków, Poland.
  58. Institute of Particle Physics, Central China Normal University, Wuhan, Hubei, China (associated with Institution Center for High Energy Physics, Tsinghua University, Beijing, China).
  59. NSC Kharkiv Institute of Physics and Technology (NSC KIPT), Kharkiv, Ukraine.
  60. STFC Rutherford Appleton Laboratory, Didcot, United Kingdom.
  61. Institute for Nuclear Research of the Russian Academy of Sciences (INR RAN), Moscow, Russia.
  62. Sezione di Milano, Milano, Italy.
  63. Instituto de Fisica Corpuscular, Centro Mixto Universidad de Valencia - CSIC, Valencia, Spain (associated with Institution ICCUB, Universitat de Barcelona, Barcelona, Spain).
  64. Institut für Physik, Universität Rostock, Rostock, Germany (associated with Institution Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany).
  65. Nikhef National Institute for Subatomic Physics and VU University Amsterdam, Amsterdam, The Netherlands.
  66. Institute for Nuclear Research of the National Academy of Sciences (KINR), Kyiv, Ukraine.
  67. National Research Centre Kurchatov Institute, Moscow, Russia (associated with Institution Institute of Theoretical and Experimental Physics (ITEP), Moscow, Russia).
  68. School of Physics, University College Dublin, Dublin, Ireland.
  69. Departamento de Fisica, Universidad Nacional de Colombia, Bogota, Colombia (associated with Institution LPNHE, Université Pierre et Marie Curie, Université Paris Diderot, CNRS/IN2P3, Paris, France).
  70. Van Swinderen Institute, University of Groningen, Groningen, The Netherlands (associated with Institution Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands).
  71. National Research Tomsk Polytechnic University, Tomsk, Russia (associated with Institution Institute of Theoretical and Experimental Physics (ITEP), Moscow, Russia).

PMID: 29286773 DOI: 10.1103/PhysRevLett.119.221801

Abstract

The decays χ_{c1}→J/ψμ^{+}μ^{-} and χ_{c2}→J/ψμ^{+}μ^{-} are observed and used to study the resonance parameters of the χ_{c1} and χ_{c2} mesons. The masses of these states are measured to be m(χ_{c1})=3510.71±0.04(stat)±0.09(syst)  MeV and m(χ_{c2})=3556.10±0.06(stat)±0.11(syst)  MeV, where the knowledge of the momentum scale for charged particles dominates the systematic uncertainty. The momentum-scale uncertainties largely cancel in the mass difference m(χ_{c2})-m(χ_{c1})=45.39±0.07(stat)±0.03(syst)  MeV. The natural width of the χ_{c2} meson is measured to be Γ(χ_{c2})=2.10±0.20(stat)±0.02(syst)  MeV. These results are in good agreement with and have comparable precision to the current world averages.

Publication Types