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Abstract:

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.

Registro:

Documento: Artículo
Título:Charged Z′ to conciliate the apparent disagreement between tt̄ Tevatron forward-backward asymmetry and LHC charge asymmetry
Autor:Álvarez, E.; Leskow, E.C.
Filiación:CONICET, IFIBA, Universidad de Buenos Aires, 1428 Ciudad de Buenos Aires, Argentina
CONICET, INFAP, Universidad Nacional de San Luis, Avenida Ejército de los Andes 950, 5700 San Luis, Argentina
Año:2012
Volumen:86
Número:11
DOI: http://dx.doi.org/10.1103/PhysRevD.86.114034
Título revista:Physical Review D - Particles, Fields, Gravitation and Cosmology
Título revista abreviado:Phys Rev D Part Fields Gravit Cosmol
ISSN:15507998
CODEN:PRVDA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v86_n11_p_Alvarez

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Citas:

---------- APA ----------
Álvarez, E. & Leskow, E.C. (2012) . Charged Z′ to conciliate the apparent disagreement between tt̄ Tevatron forward-backward asymmetry and LHC charge asymmetry. Physical Review D - Particles, Fields, Gravitation and Cosmology, 86(11).
http://dx.doi.org/10.1103/PhysRevD.86.114034
---------- CHICAGO ----------
Álvarez, E., Leskow, E.C. "Charged Z′ to conciliate the apparent disagreement between tt̄ Tevatron forward-backward asymmetry and LHC charge asymmetry" . Physical Review D - Particles, Fields, Gravitation and Cosmology 86, no. 11 (2012).
http://dx.doi.org/10.1103/PhysRevD.86.114034
---------- MLA ----------
Álvarez, E., Leskow, E.C. "Charged Z′ to conciliate the apparent disagreement between tt̄ Tevatron forward-backward asymmetry and LHC charge asymmetry" . Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 86, no. 11, 2012.
http://dx.doi.org/10.1103/PhysRevD.86.114034
---------- VANCOUVER ----------
Álvarez, E., Leskow, E.C. Charged Z′ to conciliate the apparent disagreement between tt̄ Tevatron forward-backward asymmetry and LHC charge asymmetry. Phys Rev D Part Fields Gravit Cosmol. 2012;86(11).
http://dx.doi.org/10.1103/PhysRevD.86.114034