Charged Z′ to conciliate the apparent disagreement between tt̄ Tevatron forward-backward asymmetry and LHC charge asymmetry
We propose a charged, electrically neutral, and flavor-changing Z′ model to conciliate the apparent disagreement between the important excess found in the tt̄ Tevatron forward-backward asymmetry and the null - compatible with negative - results found in the LHC charge asymmetry. We show that this mo...
| Autores principales: | , |
|---|---|
| Formato: | JOUR |
| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_15507998_v86_n11_p_Alvarez |
| Aporte de: |
| id |
todo:paper_15507998_v86_n11_p_Alvarez |
|---|---|
| record_format |
dspace |
| spelling |
todo:paper_15507998_v86_n11_p_Alvarez2023-10-03T16:24:40Z Charged Z′ to conciliate the apparent disagreement between tt̄ Tevatron forward-backward asymmetry and LHC charge asymmetry Álvarez, E. Leskow, E.C. We propose a charged, electrically neutral, and flavor-changing Z′ model to conciliate the apparent disagreement between the important excess found in the tt̄ Tevatron forward-backward asymmetry and the null - compatible with negative - results found in the LHC charge asymmetry. We show that this model contributes positively to the forward-backward asymmetry, whereas naturally a new cancellation is turned on at the LHC, yielding a null, or even negative, charge asymmetry. We find the region in parameter space that is simultaneously allowed by the stringent Tevatron and LHC observables. We show that the model is safe to atomic parity violation constraints and propose a possible increase in the Z′ width to avoid restrictions coming from tj/t̄j resonance searches and tt̄j cross section. We evaluate the constraints to the model, as well as distinctive features in the forecoming experimental results. © 2012 American Physical Society. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_15507998_v86_n11_p_Alvarez |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| description |
We propose a charged, electrically neutral, and flavor-changing Z′ model to conciliate the apparent disagreement between the important excess found in the tt̄ Tevatron forward-backward asymmetry and the null - compatible with negative - results found in the LHC charge asymmetry. We show that this model contributes positively to the forward-backward asymmetry, whereas naturally a new cancellation is turned on at the LHC, yielding a null, or even negative, charge asymmetry. We find the region in parameter space that is simultaneously allowed by the stringent Tevatron and LHC observables. We show that the model is safe to atomic parity violation constraints and propose a possible increase in the Z′ width to avoid restrictions coming from tj/t̄j resonance searches and tt̄j cross section. We evaluate the constraints to the model, as well as distinctive features in the forecoming experimental results. © 2012 American Physical Society. |
| format |
JOUR |
| author |
Álvarez, E. Leskow, E.C. |
| spellingShingle |
Álvarez, E. Leskow, E.C. Charged Z′ to conciliate the apparent disagreement between tt̄ Tevatron forward-backward asymmetry and LHC charge asymmetry |
| author_facet |
Álvarez, E. Leskow, E.C. |
| author_sort |
Álvarez, E. |
| title |
Charged Z′ to conciliate the apparent disagreement between tt̄ Tevatron forward-backward asymmetry and LHC charge asymmetry |
| title_short |
Charged Z′ to conciliate the apparent disagreement between tt̄ Tevatron forward-backward asymmetry and LHC charge asymmetry |
| title_full |
Charged Z′ to conciliate the apparent disagreement between tt̄ Tevatron forward-backward asymmetry and LHC charge asymmetry |
| title_fullStr |
Charged Z′ to conciliate the apparent disagreement between tt̄ Tevatron forward-backward asymmetry and LHC charge asymmetry |
| title_full_unstemmed |
Charged Z′ to conciliate the apparent disagreement between tt̄ Tevatron forward-backward asymmetry and LHC charge asymmetry |
| title_sort |
charged z′ to conciliate the apparent disagreement between tt̄ tevatron forward-backward asymmetry and lhc charge asymmetry |
| url |
http://hdl.handle.net/20.500.12110/paper_15507998_v86_n11_p_Alvarez |
| work_keys_str_mv |
AT alvareze chargedztoconciliatetheapparentdisagreementbetweentttevatronforwardbackwardasymmetryandlhcchargeasymmetry AT leskowec chargedztoconciliatetheapparentdisagreementbetweentttevatronforwardbackwardasymmetryandlhcchargeasymmetry |
| _version_ |
1807323547760066560 |