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Abstract:

We study single production and detection at the LHC run II of exotic partners of the bottom quark. For masses larger than 1 TeV single production can dominate over pair production that is suppressed due to phase space. The presence of exotic partners of the bottom is motivated in models aiming to solve the AFB b anomaly measured at LEP and SLC. Minimal models of this type with partial compositeness predict, as the lightest bottom partner, a new fermion V of electric charge -4/3, also called mirror. The relevant coupling for our study is a WVb vertex, which yields a signal that corresponds to a hard W, a hard b-jet and a forward light jet. We design a search strategy for the leptonic decay of the W, which avoids the large QCD multijet background and its large uncertainties. We find that the main backgrounds are W+ jets and tt̄, and the key variables to enhance the signal over them are a hard b-jet and the rapidity of the light jet. We determine the discovery reach for the LHC run II, in particular we predict that, for couplings of order ∼ g/10, this signal could be detected at a 95% confidence level with a mass up to 2.4TeV using the first 100 fb-1. © The Authors.

Registro:

Documento: Artículo
Título:Single production of an exotic bottom partner at LHC
Autor:Álvarez, E.; Da Rold, L.; Sanchez Vietto, J.I.
Filiación:CONICET, IFIBA, Ciudad Universitaria, (1428) Buenos Aires, Argentina
CONICET, Centro Atómico Bariloche, Instituto Balseiro, Av. Bustillo 9500, 8400 S. C. de Bariloche, Argentina
Palabras clave:Beyond Standard Model; Heavy Quark Physics; Technicolor and Composite Models
Año:2014
Volumen:2014
Número:2
DOI: http://dx.doi.org/10.1007/JHEP02(2014)010
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_v2014_n2_p_Alvarez

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Citas:

---------- APA ----------
Álvarez, E., Da Rold, L. & Sanchez Vietto, J.I. (2014) . Single production of an exotic bottom partner at LHC. Journal of High Energy Physics, 2014(2).
http://dx.doi.org/10.1007/JHEP02(2014)010
---------- CHICAGO ----------
Álvarez, E., Da Rold, L., Sanchez Vietto, J.I. "Single production of an exotic bottom partner at LHC" . Journal of High Energy Physics 2014, no. 2 (2014).
http://dx.doi.org/10.1007/JHEP02(2014)010
---------- MLA ----------
Álvarez, E., Da Rold, L., Sanchez Vietto, J.I. "Single production of an exotic bottom partner at LHC" . Journal of High Energy Physics, vol. 2014, no. 2, 2014.
http://dx.doi.org/10.1007/JHEP02(2014)010
---------- VANCOUVER ----------
Álvarez, E., Da Rold, L., Sanchez Vietto, J.I. Single production of an exotic bottom partner at LHC. J. High Energy Phys. 2014;2014(2).
http://dx.doi.org/10.1007/JHEP02(2014)010