Cornering dimension-6 HV V interactions at high energy LHC: the role of event ratios

Banerjee, Shankha ; Mandal, Tanumoy ; Mellado, Bruce ; Mukhopadhyaya, Biswarup (2015) Cornering dimension-6 HV V interactions at high energy LHC: the role of event ratios Journal of High Energy Physics, 2015 (9). Article ID 057. ISSN 1029-8479

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We suggest a way of improving the probes on dimension-6 CP-conserving HV V interactions (V = W,Z,γ), from the LHC data on the Higgs boson to be available in the 14 TeV run with an integrated luminosity of 3000 fb−1. We find that the ratios of total rates in different channels can be quite useful in this respect. This includes ratios of event rates in (a) different final states for the Higgs produced by the same production mechanism, and (b) the same final state from two different production modes. While most theoretical uncertainties cancel in the former, the latter helps in the case of those operators which shift the numerator and denominator in opposite directions. Our analysis, incorporating theoretical, systematic and statistical uncertain, leads to projected limits that are better than the strongest ones obtained so far from precision electroweak as well as LHC Higgs data. Moreover, values of the coefficients of the dimension-6 operators, which are allowed in disjoint intervals, can have their ranges narrowed down substantially in our approach.

Item Type:Article
Source:Copyright of this article belongs to Springer Verlag.
Keywords:Higgs Physics; Beyond Standard Model
ID Code:114488
Deposited On:04 Jun 2018 11:40
Last Modified:04 Jun 2018 11:40

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