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Abstract:

We present a phenomenological analysis of the recent Tevatron results on the tt̄ forward-backward asymmetry and invariant-mass spectrum assuming a new contribution from an s-channel gluon resonance with a mass in the range from 700 to 2500GeV. In contrast to most of the previous works, this analysis shows that for masses below ∼ 1TeV resonant New Physics could accommodate the experimental data. In general, we find that axial-like couplings are preferred for light and top quark couplings, and that only top quark couples strongly to New Physics. We find that composite model scenarios arise naturally from only phenomenological analyses of the experimental results. We show that our results are compatible with recent LHC limits in dijet and tt̄ production, and find some tension for large resonance mass ∼ 2.5 TeV. We indicate as best observables for discriminating a relatively light new gluon a better resolution in CDF forward-backward asymmetry, as well as the tt̄ charge asymmetry and invariant-mass spectrum at the LHC. © SISSA 2011.

Registro:

Documento: Artículo
Título:Phenomenology of a light gluon resonance in top-physics at Tevatron and LHC
Autor:Álvarez, E.; Rold, L.D.; Vietto, J.I.S.; Szynkman, A.
Filiación:CONICET, INFAP and Departamento de Física, FCFMN, Ejército de los Andes 950, 5700, San Luis, Argentina
CONICET, Centro Atómico Bariloche and Instituto Balseiro, Bustillo 9500, 8400, S. C. de Bariloche, Argentina
CONICET, IFIBA and Departamento de Física, FCEyN, (1428) Buenos Aires, Argentina
IFLP, CONICET - Dpto. de Física, Universidad Nacional de la Plata, C.C. 67, 1900 La Plata, Argentina
Palabras clave:Heavy Quark Physics; Quark Masses and SM Parameters; Standard Mode; Technicolor and Composite Models
Año:2011
Volumen:2011
Número:9
DOI: http://dx.doi.org/10.1007/JHEP09(2011)007
Título revista:Journal of High Energy Physics
Título revista abreviado:J. High Energy Phys.
ISSN:11266708
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_11266708_v2011_n9_p_Alvarez

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Citas:

---------- APA ----------
Álvarez, E., Rold, L.D., Vietto, J.I.S. & Szynkman, A. (2011) . Phenomenology of a light gluon resonance in top-physics at Tevatron and LHC. Journal of High Energy Physics, 2011(9).
http://dx.doi.org/10.1007/JHEP09(2011)007
---------- CHICAGO ----------
Álvarez, E., Rold, L.D., Vietto, J.I.S., Szynkman, A. "Phenomenology of a light gluon resonance in top-physics at Tevatron and LHC" . Journal of High Energy Physics 2011, no. 9 (2011).
http://dx.doi.org/10.1007/JHEP09(2011)007
---------- MLA ----------
Álvarez, E., Rold, L.D., Vietto, J.I.S., Szynkman, A. "Phenomenology of a light gluon resonance in top-physics at Tevatron and LHC" . Journal of High Energy Physics, vol. 2011, no. 9, 2011.
http://dx.doi.org/10.1007/JHEP09(2011)007
---------- VANCOUVER ----------
Álvarez, E., Rold, L.D., Vietto, J.I.S., Szynkman, A. Phenomenology of a light gluon resonance in top-physics at Tevatron and LHC. J. High Energy Phys. 2011;2011(9).
http://dx.doi.org/10.1007/JHEP09(2011)007