Production of Z'-Boson Resonances with Large Width at the LHC

Abstract

Di-lepton searches for Beyond the Standard Model (BSM) Z' bosons that rely on the analysis of the Breit-Wigner (BW) line shape are appropriate in the case of narrow resonances, but likely not sufficient in scenarios featuring Z' states with large widths. Conversely, alternative experimental strategies applicable to wide Z' resonances are much more dependent than the default bump search analyses on the modelling of QCD higher-order corrections to the production processes, for both signal and background. For heavy Z' boson searches in the di-lepton channel at the CERN Large Hadron Collider (LHC), the transverse momentum q_T of the di-lepton system peaks at q_T \ltap 10^{-2} M_{ll}, where M_{ll} is the di-lepton invariant mass. We exploit this to treat the QCD corrections by using the logarithmic resummation methods in M_{ll} / q_T to all orders in the strong coupling constant α_s. We carry out studies of Z' states with large width at the LHC by employing the program {\tt reSolve}, which performs QCD transverse momentum resummation up to Next-to-Next-to-Leading Logarithmic (NNLL) accuracy. We consider two benchmark BSM scenarios, based on the Sequential Standard Model (SSM) and dubbed `SSM wide' and `SSM enhanced'. We present results for the shape and size of Z' boson signals at the differential level, mapped in both cross section (σ) and Forward-Backward Asymmetry (A_{\rm FB}), and perform numerical investigations of the experimental sensitivity at the LHC Run 3 and High-Luminosity LHC (HL-LHC).

arXiv comment9 pages, 4 figures

References in corpus (30)

• New parton distribution functions from a global analysis of quantum chromodynamics
• The Minimal Composite Higgs Model
• The Physics of Heavy Z' Gauge Bosons
• Next-to-Next-to-Leading Order Higgs Production at Hadron Colliders
• Tevatron Run-1 Z Boson Data and Collins-Soper-Sterman Resummation Formalism
• Search for high-mass dilepton resonances using 139 fb${}^{-1}$ of $pp$ collision data collected at $\sqrt{s}=$13 TeV with the ATLAS detector
• Production of Drell--Yan lepton pairs in hadron collisions: transverse-momentum resummation at next-to-next-to-leading logarithmic accuracy
• QCD transverse-momentum resummation in gluon fusion processes
• Universality of transverse-momentum resummation and hard factors at the NNLO
• Universality of the Collins-Soper-Sterman nonperturbative function in gauge boson production
• Analysis of vector boson production within TMD factorization
• Next-to-next-to-leading logarithmic corrections at small transverse momentum in hadronic collisions
• Z' physics with early LHC data
• Z'_{B-L} discovery potential at the LHC for \sqrt{s}=7 TeV
• Soft-gluon resolution scale in QCD evolution equations
• Collinear and TMD parton densities from fits to precision DIS measurements in the parton branching method
• Technicolor Walks at the LHC
• The transverse momentum spectrum of weak gauge bosons at N${}^3$LL+NNLO
• Production of Z-bosons in the parton branching method
• Width and Partial Widths of Unstable Particles in the Light of the Nielsen Identities
• New Physics in the Third Family and its Effect on Low Energy Data
• Constraining Parton Distribution Functions from Neutral Current Drell-Yan Measurements
• reSolve - A Transverse Momentum Resummation Tool
• Neutral Current Forward-Backward Asymmetry: from ${\theta }_W$ to PDF Determinations
• Multiple Z' -> t-tbar signals in a 4D Composite Higgs Model
• Direct search for heavy gauge bosons at the LHC in the nonuniversal SU(2) model
• Constraining $Z^{\prime }$ widths from $p_T$ measurements in Drell-Yan processes
• Constraining PDFs from neutral current Drell-Yan measurements and effects of resummation in slepton pair production
• Forward-Backward Drell-Yan Asymmetry and PDF Determination
• Discriminating Z' signals in semileptonic top pair production at the LHC

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• $E_6$ Motivated UMSSM Confronts Experimental Data
• Measurement of the Drell-Yan forward-backward asymmetry at high dilepton masses in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Interference effects in dilepton resonance searches for Z' bosons and dark matter mediators
• Signals of $W^{\prime }$ and $Z^{\prime }$ bosons at the LHC in the $SU(3)\times SO(5)\times U(1)$ gauge-Higgs unification
• Cross-fertilising extra gauge boson searches at the LHC
• Model-independent searches for new physics in multi-body invariant masses
• Heavy $Z^{\prime }$ Bosons in the Secluded $U(1{)}^{\prime }$ Model at Hadron Colliders
• Exploring SMEFT Couplings Using the Forward-Backward Asymmetry in Neutral Current Drell-Yan Production at the LHC
• A combined approach to the analysis of space and ground experimental data within a simplified E6SSM
• Electroweak $t\bar{t}$ hadroproduction in the presence of heavy $Z^{\prime }$ and $W^{\prime }$ bosons at NLO QCD in POWHEG