Cargando…
Forward-backward asymmetries of the bottom and top quarks in warped extra-dimensional models: LHC predictions from the LEP and Tevatron anomalies
Within the paradigm of warped extra dimensions, third generation quarks are expected to be the most sensitive to effects beyond the Standard Model. The anomalies observed at the LEP and Tevatron colliders in the forward-backward asymmetries of the bottom (A_FB^b) and top (A_FB^t) quarks can thus be...
Autores principales: | , , |
---|---|
Formato: | info:eu-repo/semantics/article |
Lenguaje: | eng |
Publicado: |
Phys. Lett. B
2011
|
Materias: | |
Acceso en línea: | https://dx.doi.org/10.1016/j.physletb.2011.06.028 http://cds.cern.ch/record/1351430 |
_version_ | 1780922301100851200 |
---|---|
author | Djouadi, Abdelhak Moreau, Gregory Richard, Francois |
author_facet | Djouadi, Abdelhak Moreau, Gregory Richard, Francois |
author_sort | Djouadi, Abdelhak |
collection | CERN |
description | Within the paradigm of warped extra dimensions, third generation quarks are expected to be the most sensitive to effects beyond the Standard Model. The anomalies observed at the LEP and Tevatron colliders in the forward-backward asymmetries of the bottom (A_FB^b) and top (A_FB^t) quarks can thus be seen as early signatures of warped extra-dimensional scenarios. We propose a realization of such a scenario, with a gauge custodial symmetry in the bulk, which allows to address simultaneously the A_FB^b anomaly and the discrepancies observed recently on A_FB^t at high top quark rapidities and ttbar invariant masses. We also show that the various phenomenological constraints arising from LEP, Tevatron and LHC can be satisfied within the considered model. The model predicts new features, induced by a Kaluza-Klein excitation of the gluon at a mass ~1.5-2 TeV, in top quark pair production at the 7 TeV LHC. |
format | info:eu-repo/semantics/article |
id | cern-1351430 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2011 |
publisher | Phys. Lett. B |
record_format | invenio |
spelling | cern-13514302023-03-14T18:05:47Z doi:10.1016/j.physletb.2011.06.028 http://cds.cern.ch/record/1351430 eng Djouadi, Abdelhak Moreau, Gregory Richard, Francois Forward-backward asymmetries of the bottom and top quarks in warped extra-dimensional models: LHC predictions from the LEP and Tevatron anomalies Particle Physics - Phenomenology Within the paradigm of warped extra dimensions, third generation quarks are expected to be the most sensitive to effects beyond the Standard Model. The anomalies observed at the LEP and Tevatron colliders in the forward-backward asymmetries of the bottom (A_FB^b) and top (A_FB^t) quarks can thus be seen as early signatures of warped extra-dimensional scenarios. We propose a realization of such a scenario, with a gauge custodial symmetry in the bulk, which allows to address simultaneously the A_FB^b anomaly and the discrepancies observed recently on A_FB^t at high top quark rapidities and ttbar invariant masses. We also show that the various phenomenological constraints arising from LEP, Tevatron and LHC can be satisfied within the considered model. The model predicts new features, induced by a Kaluza-Klein excitation of the gluon at a mass ~1.5-2 TeV, in top quark pair production at the 7 TeV LHC. Within the paradigm of warped extra dimensions, third generation quarks are expected to be the most sensitive to effects beyond the Standard Model. The anomalies observed at the LEP and Tevatron colliders in the forward–backward asymmetries of the bottom ( AFBb ) and top ( AFBt ) quarks can thus be seen as early signatures of warped extra-dimensional scenarios. We propose a realization of such a scenario, with a gauge custodial symmetry in the bulk, which allows to address simultaneously the AFBb anomaly and the discrepancies observed recently on AFBt at high top quark rapidities and tt¯ invariant masses. We then show that the various phenomenological constraints arising from LEP, Tevatron and LHC can be satisfied within the considered model. The model predicts new features, induced by a Kaluza–Klein excitation of the gluon at a mass ∼1.5–2 TeV, in top quark pair production at the s=7 TeV LHC. Within the paradigm of warped extra dimensions, third generation quarks are expected to be the most sensitive to effects beyond the Standard Model. The anomalies observed at the LEP and Tevatron colliders in the forward-backward asymmetries of the bottom (A_FB^b) and top (A_FB^t) quarks can thus be seen as early signatures of warped extra-dimensional scenarios. We propose a realization of such a scenario, with a gauge custodial symmetry in the bulk, which allows to address simultaneously the A_FB^b anomaly and the discrepancies observed recently on A_FB^t at high top quark rapidities and ttbar invariant masses. We also show that the various phenomenological constraints arising from LEP, Tevatron and LHC can be satisfied within the considered model. The model predicts new features, induced by a Kaluza-Klein excitation of the gluon at a mass ~1.5-2 TeV, in top quark pair production at the 7 TeV LHC. info:eu-repo/grantAgreement/EC/FP7/226371 info:eu-repo/semantics/openAccess Education Level info:eu-repo/semantics/article http://cds.cern.ch/record/1351430 Phys. Lett. B info:doi/10.1016/j.physletb.2011.06.028 Phys. Lett. B, 4 (2011) pp. 458-464 2011-05-17 |
spellingShingle | Particle Physics - Phenomenology Djouadi, Abdelhak Moreau, Gregory Richard, Francois Forward-backward asymmetries of the bottom and top quarks in warped extra-dimensional models: LHC predictions from the LEP and Tevatron anomalies |
title | Forward-backward asymmetries of the bottom and top quarks in warped extra-dimensional models: LHC predictions from the LEP and Tevatron anomalies |
title_full | Forward-backward asymmetries of the bottom and top quarks in warped extra-dimensional models: LHC predictions from the LEP and Tevatron anomalies |
title_fullStr | Forward-backward asymmetries of the bottom and top quarks in warped extra-dimensional models: LHC predictions from the LEP and Tevatron anomalies |
title_full_unstemmed | Forward-backward asymmetries of the bottom and top quarks in warped extra-dimensional models: LHC predictions from the LEP and Tevatron anomalies |
title_short | Forward-backward asymmetries of the bottom and top quarks in warped extra-dimensional models: LHC predictions from the LEP and Tevatron anomalies |
title_sort | forward-backward asymmetries of the bottom and top quarks in warped extra-dimensional models: lhc predictions from the lep and tevatron anomalies |
topic | Particle Physics - Phenomenology |
url | https://dx.doi.org/10.1016/j.physletb.2011.06.028 http://cds.cern.ch/record/1351430 http://cds.cern.ch/record/1351430 |
work_keys_str_mv | AT djouadiabdelhak forwardbackwardasymmetriesofthebottomandtopquarksinwarpedextradimensionalmodelslhcpredictionsfromthelepandtevatronanomalies AT moreaugregory forwardbackwardasymmetriesofthebottomandtopquarksinwarpedextradimensionalmodelslhcpredictionsfromthelepandtevatronanomalies AT richardfrancois forwardbackwardasymmetriesofthebottomandtopquarksinwarpedextradimensionalmodelslhcpredictionsfromthelepandtevatronanomalies |