Anticipating Non-Resonant New Physics in Dilepton Angular Spectra at the LHC

Abstract

At the LHC, dileptonic events may turn up new physics interacting with quarks and leptons. The poster child for this scenario is a resonant $Z^{\prime }$, much anticipated in ${\ell }^{+}{\ell }^{-}$ invariant mass spectra. However, angular spectra of dileptons may play an equal or stronger role in discovering a non-resonant species. This paper avails of their LHC measurements to corner the couplings and masses of leptoquarks (LQs), that can mediate $q\bar{q}\to {\ell }^{+}{\ell }^{-}$ in the $t$-channel and dramatically alter Standard Model angular spectra. Also derived are constraints from alterations to $m_{\ell \ell }$ distributions. These dilepton probes, exploiting the high rates and small uncertainties of the Drell-Yan process, rival or outdo dedicated LHC searches for LQs in single and pair production modes. The couplings of LQs with electronic interactions are best bound today by low-energy measurements of atomic parity violation, but can be probed better by ${\ell }^{+}{\ell }^{-}$ measurements in the high luminosity runs of the LHC, with the angular spectra leading the way. This work also advocates the experimental presentation of boost-invariant angular asymmetries that vanish in the SM.

arXiv comment20 pages, 10 figures

References in corpus (45)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Final Report of the Muon E821 Anomalous Magnetic Moment Measurement at BNL
• R-parity violating supersymmetry
• Physics of leptoquarks in precision experiments and at particle colliders
• Observation of Anomalous Internal Pair Creation in ${}^8$Be: A Possible Signature of a Light, Neutral Boson
• Search for high-mass dilepton resonances in pp collisions at sqrt(s) = 8 TeV with the ATLAS detector
• Forward-backward asymmetry in top quark-antiquark production
• Electroweak Radiative Corrections to Neutral-Current Drell-Yan Processes at Hadron Colliders
• Revisiting parity non-conservation in cesium
• Search for physics beyond the standard model in dilepton mass spectra in proton-proton collisions at sqrt(s) = 8 TeV
• Unification without supersymmetry: neutrino mass, proton decay and light leptoquarks
• Measurement of the charge asymmetry in top quark pair production in pp collisions at sqrt(s) = 7 TeV using the ATLAS detector
• Much Ado About Leptoquarks: A Comprehensive Analysis
• Search for scalar leptoquarks in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS experiment
• Measurement of the charge asymmetry in top-quark pair production in proton-proton collisions at sqrt(s) = 7 TeV
• Cornering Scalar Leptoquarks at LHC
• Searches for scalar leptoquarks in $pp$ collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector
• Flavourful Production at Hadron Colliders
• Leptoquark Single and Pair production at LHC with CalcHEP/CompHEP in the complete model
• Measuring Z' couplings at the LHC
• Global Constraints on Lepton-Quark Contact Interactions
• The Coannihilation Codex
• Search for pair production of first and second generation leptoquarks in proton-proton collisions at sqrt(s) = 8 TeV
• Search for contact interactions and large extra dimensions in the dilepton channel using proton-proton collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector
• Running Electroweak Couplings as a Probe of New Physics
• Effective Theory and Simple Completions for Neutrino Interactions
• Search for single production of scalar leptoquarks in proton-proton collisions at sqrt(s) = 8 TeV
• Forward-Backward Asymmetry as a Discovery Tool for Z' Bosons at the LHC
• Forward-backward asymmetry of Drell-Yan lepton pairs in pp collisions at sqrt(s) = 8 TeV
• Using Final State Pseudorapidities to Improve s-channel Resonance Observables at the LHC
• Constraining Extra Neutral Gauge Bosons with Atomic Parity Violation Measurements
• Discovery in Drell-Yan Processes at the LHC
• Estimated constraints on t-channel Leptoquark exchange from LHC contact interaction searches
• LHC and dark matter signals of Z' bosons
• Dark Matter Signals in Dilepton Production at Hadron Colliders
• Separating Electroweak and Strong interactions in Drell-Yan processes at LHC: leptons angular distributions and reference frames
• Measuring R-parity-violating couplings in dilepton production at the LHC
• Testing Grand Unification at the (S)LHC
• Testing Parity with Atomic Radiative Capture of ${\mu }^{-}$
• Leptogluons in dilepton production at LHC
• t-channel production of heavy charged leptons
• Discovering and profiling Z' bosons using asymmetry observables in top quark pair production with the lepton-plus-jets final state at the LHC
• Top-quark forward-backward asymmetry from a color-octet t-channel resonance
• Estimates of Z'couplings within data on the A_{FB} for Drell-Yan process at the LHC at s^(1/2) = 7 TeV and 8 TeV
• Probing new physics with tau-leptons at the LHC

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• First-Generation New Physics in Simplified Models: From Low-Energy Parity Violation to the LHC
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• On the Minimal Flavor Violating Leptoquark Explanation of the $R_{D^{(\ast )}}$ Anomaly
• Signatures of ${\tilde{R}}_2$ class of Leptoquarks at the upcoming $ep$ colliders
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• Constraining R-parity-violating couplings in $\tau$-processes at the LHC and in electroweak precision measurements
• Establishing the Isolated Standard Model
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• Constraining scalars of $16_H$ through proton decays in non-renormalisable $SO(10)$ models