Search for a Stable Six-Quark State at BABAR
Recent investigations have suggested that the six-quark combination u u d d s s could be a deeply bound state ( S ) that has eluded detection so far, and a potential dark matter candidate. We report the first search for a stable, doubly strange six-quark state in Υ → S ¯ Λ ¯ Λ decays based on a samp...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2019 |
| País: | España |
| Institución: | Universidad de Barcelona |
| Repositorio: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/171018 |
| Acceso en línea: | https://hdl.handle.net/2445/171018 |
| Access Level: | acceso abierto |
| Palabra clave: | Quarks Matèria fosca (Astronomia) Partícules (Matèria) Dark matter (Astronomy) Particles |
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Search for a Stable Six-Quark State at BABARGraugés Pous, EugeniBABAR CollaborationQuarksMatèria fosca (Astronomia)Partícules (Matèria)QuarksDark matter (Astronomy)ParticlesRecent investigations have suggested that the six-quark combination u u d d s s could be a deeply bound state ( S ) that has eluded detection so far, and a potential dark matter candidate. We report the first search for a stable, doubly strange six-quark state in Υ → S ¯ Λ ¯ Λ decays based on a sample of 90 × 1 0 6 Υ ( 2 S ) and 110 × 1 0 6 Υ ( 3 S ) decays collected by the BABAR experiment. No signal is observed, and 90% confidence level limits on the combined Υ ( 2 S , 3 S ) → S ¯ Λ ¯ Λ branching fraction in the range ( 1.2 - 1.4 ) × 1 0 − 7 are derived for m S < 2.05 GeV . These bounds set stringent limits on the existence of such exotic particles.American Physical Society2019info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/171018Articles publicats en revistes (Física Quàntica i Astrofísica)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.122.072002Physical Review Letters, 2019, vol. 122, num. 7, p. 072002https://doi.org/10.1103/PhysRevLett.122.072002cc- by (c) Graugés et. al. , 2019http://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1710182026-05-27T06:46:51Z |
| dc.title.none.fl_str_mv |
Search for a Stable Six-Quark State at BABAR |
| title |
Search for a Stable Six-Quark State at BABAR |
| spellingShingle |
Search for a Stable Six-Quark State at BABAR Graugés Pous, Eugeni Quarks Matèria fosca (Astronomia) Partícules (Matèria) Quarks Dark matter (Astronomy) Particles |
| title_short |
Search for a Stable Six-Quark State at BABAR |
| title_full |
Search for a Stable Six-Quark State at BABAR |
| title_fullStr |
Search for a Stable Six-Quark State at BABAR |
| title_full_unstemmed |
Search for a Stable Six-Quark State at BABAR |
| title_sort |
Search for a Stable Six-Quark State at BABAR |
| dc.creator.none.fl_str_mv |
Graugés Pous, Eugeni BABAR Collaboration |
| author |
Graugés Pous, Eugeni |
| author_facet |
Graugés Pous, Eugeni BABAR Collaboration |
| author_role |
author |
| author2 |
BABAR Collaboration |
| author2_role |
author |
| dc.subject.none.fl_str_mv |
Quarks Matèria fosca (Astronomia) Partícules (Matèria) Quarks Dark matter (Astronomy) Particles |
| topic |
Quarks Matèria fosca (Astronomia) Partícules (Matèria) Quarks Dark matter (Astronomy) Particles |
| description |
Recent investigations have suggested that the six-quark combination u u d d s s could be a deeply bound state ( S ) that has eluded detection so far, and a potential dark matter candidate. We report the first search for a stable, doubly strange six-quark state in Υ → S ¯ Λ ¯ Λ decays based on a sample of 90 × 1 0 6 Υ ( 2 S ) and 110 × 1 0 6 Υ ( 3 S ) decays collected by the BABAR experiment. No signal is observed, and 90% confidence level limits on the combined Υ ( 2 S , 3 S ) → S ¯ Λ ¯ Λ branching fraction in the range ( 1.2 - 1.4 ) × 1 0 − 7 are derived for m S < 2.05 GeV . These bounds set stringent limits on the existence of such exotic particles. |
| publishDate |
2019 |
| dc.date.none.fl_str_mv |
2019 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
| format |
article |
| status_str |
publishedVersion |
| dc.identifier.none.fl_str_mv |
https://hdl.handle.net/2445/171018 |
| url |
https://hdl.handle.net/2445/171018 |
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Inglés |
| language_invalid_str_mv |
Inglés |
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Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.122.072002 Physical Review Letters, 2019, vol. 122, num. 7, p. 072002 https://doi.org/10.1103/PhysRevLett.122.072002 |
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cc- by (c) Graugés et. al. , 2019 http://creativecommons.org/licenses/by/3.0/es/ info:eu-repo/semantics/openAccess |
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cc- by (c) Graugés et. al. , 2019 http://creativecommons.org/licenses/by/3.0/es/ |
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openAccess |
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application/pdf |
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American Physical Society |
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American Physical Society |
| dc.source.none.fl_str_mv |
Articles publicats en revistes (Física Quàntica i Astrofísica) reponame:Dipòsit Digital de la UB instname:Universidad de Barcelona |
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Universidad de Barcelona |
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Dipòsit Digital de la UB |
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Dipòsit Digital de la UB |
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15,300719 |