Abstract
In this paper, we consider the possibility that a new stage of matter stemming from hidden/dark sectors beyond the Standard Model, to be formed in p p collisions at the LHC (Large Hadron Collider), can significantly modify the correlations among final-state particles. In particular, two-particle azimuthal correlations are studied by means of a Fourier series sensitive to the near-side ridge effect while assuming that hidden/dark particles decay on top of the conventional parton shower. Then, new (fractional) harmonic terms should be included in the Fourier analysis of the azimuthal anisotropies, encoding the hypothetical new physics contribution and enabling its detection in a complementary way to other signatures.
Highlights
The interest in discovering new physics (NP) beyond the Standard Model (SM) at the LargeHadron Collider (LHC) is beyond doubt
Focusing only on the particle content relevant to the study presented here, we collectively denote by Qv the hidden partners of the SM quarks, charged under both Gv and GSM, while gv and qv stand for the v-gluon and v-quark only charged under the Gv hidden group, respectively
NP contribution, extra selection cuts beyond high multiplicity and usual p T ranges of charged hadrons should be applied on events, in particular high p T leptons and/or missing transverse energy/momentum
Summary
The interest in discovering new physics (NP) beyond the Standard Model (SM) at the Large. The SM sector could feebly couple to the HS (and the equivalent hadronic v-particles and states) via a neutral Z 0 or via heavy particles bearing both GSM and Gv charges We consider the latter possibility along the lines of the Monte Carlo (MC) study using PYTHIA [17], where the hidden shower is basically controlled by two parameters: the coupling strength αv , assumed to be a constant (i.e., no running is considered), and the lower cut-off scale set equal to 0.4 GeV as by default in QCD showers, consistent with a low hidden confinement scale Λv. The ultimate goal in this paper is to show that long-range azimuthal correlations among final-state particles should emerge as a consequence of such a scenario
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