Asymmetries in tt¯ production: LHC versus Tevatron
Metadatos
Mostrar el registro completo del ítemEditorial
American Physical Society
Materia
Asymmetry LHC (Large Hadron Collider) Tevatron Top quark Hadron colliders
Fecha
2011Referencia bibliográfica
Aguilar-Saavedra, J.A.; Pérez-Victoria, M. Asymmetries in tt¯ production: LHC versus Tevatron. Physical Review D, 84: 115013 (2011). [http://hdl.handle.net/10481/30543]
Patrocinador
This work has been partially supported by projects FPA2010-17915 (MICINN), FQM 101 and FQM 437 (Junta de Andalucía) and CERN/FP/116397/2010 (FCT).Resumen
The measurement of a charge asymmetry in tt¯ production at the LHC constitutes more than an independent confirmation of the forward-backward asymmetry found at the Tevatron. Indeed, both measurements together can be used to identify the source of the asymmetry. This is demonstrated for the case of new Z′, W′ vector bosons and color-sextet and triplet scalars, exchanged in t, u channels, respectively, and a very heavy axigluon in the s channel. In particular, current LHC measurements disfavor Z′, W′ models above the 2σ level.