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19 April 2024 |
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Forward-Backward Asymmetry as a Discovery Tool for Z' Bosons at the LHC | | E. Accomando
; A. Belyaev
; J. Fiaschi
; K. Mimasu
; S. Moretti
; C. Shepherd-Themistocleous
; | | Date: |
9 Mar 2015 | | Abstract: | The Forward-Backward Asymmetry (AFB) in Z’ physics is commonly only perceived
as the observable which possibly allows one to interpret a Z’ signal by
distinguishing different models of such (heavy) spin-1 bosons. In this paper,
we examine the potential of AFB in setting bounds on or even discovering a Z’
boson at the Large Hadron Collider (LHC) and show that it might be a powerful
tool for this purpose. We analyse two different scenarios: Z’ bosons with a
narrow and wide width, respectively. We find that, in the first case, the
significance of the AFB search can be comparable with that of the bump search
usually adopted by the experimental collaborations; however, being a ratio of
(differential) cross sections the AFB has the advantage of reducing
systematical errors. In the second case, the AFB search can win over the bump
search in terms of event shape, as the structure of the AFB distribution as a
function of the invariant mass of the reconstructed Z’boson could nail down the
new broad resonance much better than the event counting strategy usually
adopted in such cases. | | Source: | arXiv, 1503.2672 | | Services: | Forum | Review | PDF | Favorites | |
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