Composite Higgs at high transverse momentum

Abstract

In this paper we explore composite Higgs scenarios through the effects of light top-partners in Higgs+Jet production at the LHC. The pseudo-Goldstone boson nature of the Higgs field means that single-Higgs production via gluon fusion is insensitive to the mass spectrum of the top-partners. However in associated production this is not the case, and new physics scales may be probed. In the course of the work we consider scenarios with both one and two light top-partner multiplets in the spectrum of composite states. We study corrections to the Higgs couplings and the effects that the light top-partner multiplets have on the transverse momentum spectrum of the Higgs. Interestingly, we find that the corrections to the Standard Model expectation depend strongly on the representation of the top-partners in the global symmetry.

Higgs Transverse Momentum with a Jet Veto: A Double-Differential Resummation

“…A full exploitation of such measurements requires an unprecedented level of precision in the theoretical description of the relevant observables. In this context, a prominent role is played by kinematic distributions of the Higgs boson and the accompanying QCD radiation, which are sensitive to potential new-physics effects, such as modifications of light-quark Yukawa couplings [4,5], or heavy new-physics states [6][7][8][9][10][11]. Experimental analyses of Higgs processes typically categorize the collected events in jet bins, according to the different number of jets-collimated bunches of hadrons in the final state-produced in association with the Higgs boson.…”

“…The corrections (10) and (11) describe the aforementioned effects for a single pair of emissions. At NNLL, all remaining emissions can be considered to be far in angle from the pair k a , k b , and therefore they never get clustered with the jets resulting from Eqs.…”

“…At NNLL, all remaining emissions can be considered to be far in angle from the pair k a , k b , and therefore they never get clustered with the jets resulting from Eqs. (10) and (11). As a final step towards a NNLL prediction, one must account for non-soft collinear emissions off the initial-state particles.…”

Dilaton portal in strongly interacting twin Higgs models

“…It is well known that in composite Higgs models this effective coupling is modified due to the pseudo-Goldstone nature of the Higgs, and that the correction depends strongly on the form of the couplings to the colored top-partners. This has been studied both in the 4D [63][64][65] and 5D [66] contexts where the results match once one properly considers the presence of all relevant top-partners. Here we will consider the effective description of our holographic top sector, in which the left-handed top quark resides in an 8 of SO(8), the righthanded top quark resides in a singlet, and vector-like top-partners appear both in the 8 and in the singlet.…”

H1jet, a fast program to compute transverse momentum distributions

“…The top-partner can also be considered in the explicit composite Higgs models of Ref. [27], all with finite f . Four different models are implemented, M1 5 , M1 14 , M4 5 , and M4 14 , which modify the Yukawa coupling factors in the following way:…”