Discovery and mass spectroscopy via mixed diboson production at the LHC in a 4-site model with a composite Higgs boson

作者：Fedeli Luca^*; Moretti Stefano; De Curtis Stefania; Dominici Daniele

来源：Physical Review D - Particles, Fields, Gravitation and Cosmology, 2013, 87(1): 015021.

DOI：10.1103/PhysRevD.87.015021

We investigate the scope of the Large Hadron Collider in probing the parameter space of a 4-site model supplemented by one composite Higgs state. We concentrate on the yield of %26quot;mixed%26apos;%26apos; diboson production giving three leptons and missing (transverse) energy in the final state, i.e., events induced via the subprocess q (q) over bar%26apos; -%26gt; l(+) v(l)l%26apos;(+) l%26apos;(-) + c.c., where q, q%26apos; are quarks and l, l%26apos; = e, mu in all possible combinations, a signature which enables the production in the intermediate steps of all additional-with respect to the standard model-neutral and charged gauge bosons belonging to the spectrum of this scenario. We not only find this channel to be accessible over the background but also show that, after a dedicated cut-based analysis, kinematical reconstruction of all such resonances is always possible. We finally compare the yield of the mixed diboson mode to that of the %26quot;charged%26apos;%26apos; diboson one and find that the former is of lesser scope than the latter at smaller gauge boson masses but it overcomes it at higher values, thereby revealing itself as a viable search mode covering new regions of parameter space. DOI: 10.1103/PhysRevD.87.015021

• 出版日期2013-1-15