Precision Measurement of the X(3872) Mass in J/psi pi(+)pi(-) Decays
We present an analysis of the mass of the X(3872) reconstructed via its decay to J/psi pi(+)pi(-) using 2.4 fb(-1) of integrated luminosity from p (p) over bar collisions at root s = 1.96 TeV, collected with the CDF II detector at the Fermilab Tevatron. The possible existence of two nearby mass stat...
| Autores: | , , , , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2009 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/22214 |
| Acceso en línea: | http://hdl.handle.net/10261/22214 |
| Access Level: | acceso abierto |
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Precision Measurement of the X(3872) Mass in J/psi pi(+)pi(-) DecaysCDF CollaborationCabrera, SusanaCuenca Almenar, CristóbalÁlvarez González, B.Casal, BrunoCuevas, JavierGómez, GervasioRodrigo Anoro, TeresaRuiz Jimeno, AlbertoScodellaro, LucaVila, IvánVilar Cortabitarte, R.Aaltonen, T.We present an analysis of the mass of the X(3872) reconstructed via its decay to J/psi pi(+)pi(-) using 2.4 fb(-1) of integrated luminosity from p (p) over bar collisions at root s = 1.96 TeV, collected with the CDF II detector at the Fermilab Tevatron. The possible existence of two nearby mass states is investigated. Within the limits of our experimental resolution the data are consistent with a single state, and having no evidence for two states we set upper limits on the mass difference between two hypothetical states for different assumed ratios of contributions to the observed peak. For equal contributions, the 95% confidence level upper limit on the mass difference is 3.6 MeV/c(2). Under the single-state model the X(3872) mass is measured to be 3871.61 +/- 0.16(stat) +/- 0.19(syst) MeV/c(2), which is the most precise determination to date.We thank E. Braaten for useful discussions. We thank the Fermilab staff and the technical staffs of the participating institutions for their vital contributions. This work was supported by the U.S. Department of Energy and National Science Foundation; the Italian Istituto Nazionale di Fisica Nucleare; the Ministry of Education, Culture, Sports, Science and Technology of Japan; the Natural Sciences and Engineering Research Council of Canada; the National Science Council of the Republic of China; the Swiss National Science Foundation; the A.P. Sloan Foundation; the Bundesministerium für Bildung und Forschung, Germany; the Korean Science and Engineering Foundation and the Korean Research Foundation; the Science and Technology Facilities Council and the Royal Society, UK; the Institut National de Physique Nucleaire et Physique des Particules/CNRS; the Russian Foundation for Basic Research; the Ministerio de Ciencia e Innovación, and Programa Consolider-Ingenio 2010, Spain; the Slovak R&D Agency; and the Academy of Finland.Peer reviewedAmerican Physical Society201020102009info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501226141 bytesapplication/pdfhttp://hdl.handle.net/10261/22214reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/ 10.1103/PhysRevLett.103.152001info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/222142026-05-22T06:33:51Z |
| dc.title.none.fl_str_mv |
Precision Measurement of the X(3872) Mass in J/psi pi(+)pi(-) Decays |
| title |
Precision Measurement of the X(3872) Mass in J/psi pi(+)pi(-) Decays |
| spellingShingle |
Precision Measurement of the X(3872) Mass in J/psi pi(+)pi(-) Decays CDF Collaboration |
| title_short |
Precision Measurement of the X(3872) Mass in J/psi pi(+)pi(-) Decays |
| title_full |
Precision Measurement of the X(3872) Mass in J/psi pi(+)pi(-) Decays |
| title_fullStr |
Precision Measurement of the X(3872) Mass in J/psi pi(+)pi(-) Decays |
| title_full_unstemmed |
Precision Measurement of the X(3872) Mass in J/psi pi(+)pi(-) Decays |
| title_sort |
Precision Measurement of the X(3872) Mass in J/psi pi(+)pi(-) Decays |
| dc.creator.none.fl_str_mv |
CDF Collaboration Cabrera, Susana Cuenca Almenar, Cristóbal Álvarez González, B. Casal, Bruno Cuevas, Javier Gómez, Gervasio Rodrigo Anoro, Teresa Ruiz Jimeno, Alberto Scodellaro, Luca Vila, Iván Vilar Cortabitarte, R. Aaltonen, T. |
| author |
CDF Collaboration |
| author_facet |
CDF Collaboration Cabrera, Susana Cuenca Almenar, Cristóbal Álvarez González, B. Casal, Bruno Cuevas, Javier Gómez, Gervasio Rodrigo Anoro, Teresa Ruiz Jimeno, Alberto Scodellaro, Luca Vila, Iván Vilar Cortabitarte, R. Aaltonen, T. |
| author_role |
author |
| author2 |
Cabrera, Susana Cuenca Almenar, Cristóbal Álvarez González, B. Casal, Bruno Cuevas, Javier Gómez, Gervasio Rodrigo Anoro, Teresa Ruiz Jimeno, Alberto Scodellaro, Luca Vila, Iván Vilar Cortabitarte, R. Aaltonen, T. |
| author2_role |
author author author author author author author author author author author author |
| description |
We present an analysis of the mass of the X(3872) reconstructed via its decay to J/psi pi(+)pi(-) using 2.4 fb(-1) of integrated luminosity from p (p) over bar collisions at root s = 1.96 TeV, collected with the CDF II detector at the Fermilab Tevatron. The possible existence of two nearby mass states is investigated. Within the limits of our experimental resolution the data are consistent with a single state, and having no evidence for two states we set upper limits on the mass difference between two hypothetical states for different assumed ratios of contributions to the observed peak. For equal contributions, the 95% confidence level upper limit on the mass difference is 3.6 MeV/c(2). Under the single-state model the X(3872) mass is measured to be 3871.61 +/- 0.16(stat) +/- 0.19(syst) MeV/c(2), which is the most precise determination to date. |
| publishDate |
2009 |
| dc.date.none.fl_str_mv |
2009 2010 2010 |
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info:eu-repo/semantics/article http://purl.org/coar/resource_type/c_6501 |
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article |
| dc.identifier.none.fl_str_mv |
http://hdl.handle.net/10261/22214 |
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http://hdl.handle.net/10261/22214 |
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Inglés |
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Inglés |
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http://dx.doi.org/ 10.1103/PhysRevLett.103.152001 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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226141 bytes application/pdf |
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American Physical Society |
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American Physical Society |
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reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC instname:Consejo Superior de Investigaciones Científicas (CSIC) |
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