First measurement of the charge asymmetry in beauty-quark pair production.
The difference in the angular distributions between beauty quarks and antiquarks, referred to as the charge asymmetry, is measured for the first time in bb pair production at a hadron collider. The data used correspond to an integrated luminosity of 1.0 fb(-1) collected at 7 TeV center-of-mass energ...
| Autores principales: | , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Formato: | Journal article |
| Lenguaje: | English |
| Publicado: |
American Physical Society
2014
|
| _version_ | 1826280906607820800 |
|---|---|
| author | Aaij, R Adeva, B Adinolfi, M Affolder, A Ajaltouni, Z Akar, S Albrecht, J Alessio, F Alexander, M Ali, S Alkhazov, G Alvarez Cartelle, P Alves, A Amato, S Amerio, S Amhis, Y An, L Anderlini, L Anderson, J Andreassen, R Andreotti, M Andrews, J Appleby, R Aquines Gutierrez, O Archilli, F |
| author_facet | Aaij, R Adeva, B Adinolfi, M Affolder, A Ajaltouni, Z Akar, S Albrecht, J Alessio, F Alexander, M Ali, S Alkhazov, G Alvarez Cartelle, P Alves, A Amato, S Amerio, S Amhis, Y An, L Anderlini, L Anderson, J Andreassen, R Andreotti, M Andrews, J Appleby, R Aquines Gutierrez, O Archilli, F |
| author_sort | Aaij, R |
| collection | OXFORD |
| description | The difference in the angular distributions between beauty quarks and antiquarks, referred to as the charge asymmetry, is measured for the first time in bb pair production at a hadron collider. The data used correspond to an integrated luminosity of 1.0 fb(-1) collected at 7 TeV center-of-mass energy in proton-proton collisions with the LHCb detector. The measurement is performed in three regions of the invariant mass of the bb system. The results obtained are A(C)(bb))(40<m(bb))<75 0.3%,="" 0.4="" 0.6%,="" 0.9="" 105="" <="" a(c)(bb)(m(bb))="" a(c)(bb))(75<m(bb))="" c(2))="2.0" gev="" ±=""> 105 GeV/c(2)) = 1.6 ± 1.7 ± 0.6%, where A(C)(bb)) is defined as the asymmetry in the difference in rapidity between jets formed from the beauty quark and antiquark, where in each case the first uncertainty is statistical and the second systematic. The beauty jets are required to satisfy 2 < η < 4, E(T) >20 GeV, and have an opening angle in the transverse plane Δ ϕ > 2.6 rad. These measurements are consistent with the predictions of the standard model.</m(bb))<75> |
| first_indexed | 2024-03-07T00:20:46Z |
| format | Journal article |
| id | oxford-uuid:7c768d2f-08fa-41b9-bde5-605d7ae066f2 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T00:20:46Z |
| publishDate | 2014 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | oxford-uuid:7c768d2f-08fa-41b9-bde5-605d7ae066f22022-03-26T20:57:24ZFirst measurement of the charge asymmetry in beauty-quark pair production.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:7c768d2f-08fa-41b9-bde5-605d7ae066f2EnglishSymplectic Elements at OxfordAmerican Physical Society2014Aaij, RAdeva, BAdinolfi, MAffolder, AAjaltouni, ZAkar, SAlbrecht, JAlessio, FAlexander, MAli, SAlkhazov, GAlvarez Cartelle, PAlves, AAmato, SAmerio, SAmhis, YAn, LAnderlini, LAnderson, JAndreassen, RAndreotti, MAndrews, JAppleby, RAquines Gutierrez, OArchilli, FThe difference in the angular distributions between beauty quarks and antiquarks, referred to as the charge asymmetry, is measured for the first time in bb pair production at a hadron collider. The data used correspond to an integrated luminosity of 1.0 fb(-1) collected at 7 TeV center-of-mass energy in proton-proton collisions with the LHCb detector. The measurement is performed in three regions of the invariant mass of the bb system. The results obtained are A(C)(bb))(40<m(bb))<75 0.3%,="" 0.4="" 0.6%,="" 0.9="" 105="" <="" a(c)(bb)(m(bb))="" a(c)(bb))(75<m(bb))="" c(2))="2.0" gev="" ±=""> 105 GeV/c(2)) = 1.6 ± 1.7 ± 0.6%, where A(C)(bb)) is defined as the asymmetry in the difference in rapidity between jets formed from the beauty quark and antiquark, where in each case the first uncertainty is statistical and the second systematic. The beauty jets are required to satisfy 2 < η < 4, E(T) >20 GeV, and have an opening angle in the transverse plane Δ ϕ > 2.6 rad. These measurements are consistent with the predictions of the standard model.</m(bb))<75> |
| spellingShingle | Aaij, R Adeva, B Adinolfi, M Affolder, A Ajaltouni, Z Akar, S Albrecht, J Alessio, F Alexander, M Ali, S Alkhazov, G Alvarez Cartelle, P Alves, A Amato, S Amerio, S Amhis, Y An, L Anderlini, L Anderson, J Andreassen, R Andreotti, M Andrews, J Appleby, R Aquines Gutierrez, O Archilli, F First measurement of the charge asymmetry in beauty-quark pair production. |
| title | First measurement of the charge asymmetry in beauty-quark pair production. |
| title_full | First measurement of the charge asymmetry in beauty-quark pair production. |
| title_fullStr | First measurement of the charge asymmetry in beauty-quark pair production. |
| title_full_unstemmed | First measurement of the charge asymmetry in beauty-quark pair production. |
| title_short | First measurement of the charge asymmetry in beauty-quark pair production. |
| title_sort | first measurement of the charge asymmetry in beauty quark pair production |
| work_keys_str_mv | AT aaijr firstmeasurementofthechargeasymmetryinbeautyquarkpairproduction AT adevab firstmeasurementofthechargeasymmetryinbeautyquarkpairproduction AT adinolfim firstmeasurementofthechargeasymmetryinbeautyquarkpairproduction AT affoldera firstmeasurementofthechargeasymmetryinbeautyquarkpairproduction AT ajaltouniz firstmeasurementofthechargeasymmetryinbeautyquarkpairproduction AT akars firstmeasurementofthechargeasymmetryinbeautyquarkpairproduction AT albrechtj firstmeasurementofthechargeasymmetryinbeautyquarkpairproduction AT alessiof firstmeasurementofthechargeasymmetryinbeautyquarkpairproduction AT alexanderm firstmeasurementofthechargeasymmetryinbeautyquarkpairproduction AT alis firstmeasurementofthechargeasymmetryinbeautyquarkpairproduction AT alkhazovg firstmeasurementofthechargeasymmetryinbeautyquarkpairproduction AT alvarezcartellep firstmeasurementofthechargeasymmetryinbeautyquarkpairproduction AT alvesa firstmeasurementofthechargeasymmetryinbeautyquarkpairproduction AT amatos firstmeasurementofthechargeasymmetryinbeautyquarkpairproduction AT amerios firstmeasurementofthechargeasymmetryinbeautyquarkpairproduction AT amhisy firstmeasurementofthechargeasymmetryinbeautyquarkpairproduction AT anl firstmeasurementofthechargeasymmetryinbeautyquarkpairproduction AT anderlinil firstmeasurementofthechargeasymmetryinbeautyquarkpairproduction AT andersonj firstmeasurementofthechargeasymmetryinbeautyquarkpairproduction AT andreassenr firstmeasurementofthechargeasymmetryinbeautyquarkpairproduction AT andreottim firstmeasurementofthechargeasymmetryinbeautyquarkpairproduction AT andrewsj firstmeasurementofthechargeasymmetryinbeautyquarkpairproduction AT applebyr firstmeasurementofthechargeasymmetryinbeautyquarkpairproduction AT aquinesgutierrezo firstmeasurementofthechargeasymmetryinbeautyquarkpairproduction AT archillif firstmeasurementofthechargeasymmetryinbeautyquarkpairproduction |