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Recent measurements in $B \to K^{(*)} \mu^+ \mu^-$ decays are somewhat discrepant with Standard Model predictions. They may be harbingers of new physics at an energy scale potentially accessible to direct discovery. We estimate the…

High Energy Physics - Phenomenology · Physics 2018-04-04 B. C. Allanach , Ben Gripaios , Tevong You

We estimate the future sensitivity of the high luminosity (HL-) and high energy (HE-) modes of the Large Hadron Collider (LHC) and of a 100 TeV future circular collider (FCC-hh) to leptoquark (LQ) pair production in the muon-plus-jet decay…

High Energy Physics - Phenomenology · Physics 2020-03-18 B. C. Allanach , Tyler Corbett , Maeve Madigan

We conduct a comprehensive investigation into the flavour phenomenology and collider signatures of flavon of $\mathcal{Z}_{\rm N} \times \mathcal{Z}_{\rm M}$ flavour symmetries for the soft symmetry-breaking scenario and a new…

High Energy Physics - Phenomenology · Physics 2024-12-12 Gauhar Abbas , Ashutosh Kumar Alok , Neetu Raj Singh Chundawat , Najimuddin Khan , Neelam Singh

The Large Hadron Collider (LHC) will open a new era in high energy physics. The expected large cross section for heavy flavour production in proton-proton collisions at $\sqrt{s}$ = 14 TeV will allow detailed studies of the production…

High Energy Physics - Experiment · Physics 2014-11-20 Alessandro Grelli , Andre Mischke

We estimate that the LHC could set bounds BR(Z -> mu^\pm e^\mp) < 4.1 * 10^{-7} and BR(Z -> tau^\pm mu^\mp)< 3.5 * 10^{-6} (at 95% C.L.) with 20 inverse fb of data at 8 TeV. A similar sensitivity can be anticipated for Z -> tau^\pm e^\mp,…

High Energy Physics - Phenomenology · Physics 2015-06-05 Sacha Davidson , Sylvain Lacroix , Patrice Verdier

We present sensitivity projections for discovering a heavy resonance decaying to electron and muon pairs and for probing the charged lepton non-universality in such decays at the HL-LHC and FCC-hh. The analysis takes into account the…

High Energy Physics - Phenomenology · Physics 2022-10-05 F. Conventi , G. D'Ambrosio , A. M. Iyer , E. Rossi

This paper explores the physics reach of the proton-proton Future Circular Collider (FCC-hh) and of the High-Energy LHC (HE-LHC) for searches of new particles produced in the $s$-channel and decaying to two high-energy leptons, jets…

High Energy Physics - Phenomenology · Physics 2019-07-24 Clement Helsens , David Jamin , Michelangelo L. Mangano , Thomas G. Rizzo , Michele Selvaggi

Lepton flavor violating Higgs decays could appear in scenarios beyond the Standard Model of particle physics. In this article, we study the sensitivity of a future Compact Linear Collider (CLIC) to such processes, namely, $h\rightarrow…

High Energy Physics - Phenomenology · Physics 2026-05-12 Francisca Garay , Gabriel Vega , Philipp Roloff

The Future Circular Collider (FCC-hh) is a proposed successor of the Large Hadron Collider (LHC). FCC-hh would push both the energy and intensity frontiers of searches for new physics particles. In particular, due to higher energy and…

High Energy Physics - Phenomenology · Physics 2023-01-16 Alexey Boyarsky , Oleksii Mikulenko , Maksym Ovchynnikov , Lesya Shchutska

Recent measurements have revealed a number of intriguing deviations from the Standard Model predictions in $B$ meson decays, in particular in observables testing lepton flavour universality. We review their experimental status and…

High Energy Physics - Phenomenology · Physics 2017-07-13 Monika Blanke

Precision measurements of heavy-flavor hadroproduction at the Large Hadron Collider (LHC) have the ability to probe heavy-flavor parton distribution functions (PDFs) in the proton. Sensitivity of inclusive $B^\pm$ meson production cross…

High Energy Physics - Phenomenology · Physics 2022-03-15 Keping Xie , Marco Guzzi , Pavel Nadolsky

We compare the sensitivity of precision measurements of lepton flavour observables to the reach of the LHC in a case study of lepton-flavour violating operators of dimension six with two leptons and two quarks. For light quarks precision…

High Energy Physics - Phenomenology · Physics 2016-02-29 Yi Cai , Michael A. Schmidt

Motivated by recently observed anomalies in the flavour sector, we analyse the potential of measurements of top quarks at the Large Hadron Collider (LHC) to provide complementary constraints on interactions that shape low-energy precision…

High Energy Physics - Phenomenology · Physics 2025-03-13 Oliver Atkinson , Christoph Englert , Matthew Kirk , Gilberto Tetlalmatzi-Xolocotzi

We present the Large Hadron Collider (LHC) discovery potential in the $Z'$ sector of a $U(1)_{B-L}$ enlarged Standard Model (that also includes three heavy Majorana neutrinos and an additional Higgs boson) for $\sqrt{s}=7$, 10 and 14 TeV…

High Energy Physics - Phenomenology · Physics 2011-04-13 Lorenzo Basso , Alexander Belyaev , Stefano Moretti , Giovanni Marco Pruna , Claire H. Shepherd-Themistocleous

The juxtaposition of the precision of lepton flavour measurements and the limited energy range of the Large Hadron Collider (LHC) to discover dynamical degrees of freedom linked to the generation of the observed lepton mass patterns naively…

High Energy Physics - Phenomenology · Physics 2024-09-06 Upalaparna Banerjee , Christoph Englert , Wrishik Naskar

Precision studies of flavour-changing processes involving quarks and leptons provide a number of ways to improve knowledge of the Standard Model and search for physics beyond it. There are excellent short- and mid-term prospects for…

High Energy Physics - Experiment · Physics 2025-05-07 The ATLAS Collaboration , Belle II Collaboration , CMS Collaboration , LHCb Collaboration

The discovery of lepton flavour violating interactions will be striking evidence for physics beyond the Standard Model. Focusing on the three decays $\tau^\mp \to \mu^\pm \mu^\mp \mu^\mp$, $\tau^\mp \to e^\pm \mu^\mp \mu^\mp$ and $\tau^\mp…

High Energy Physics - Phenomenology · Physics 2017-05-09 Chris Hays , Manimala Mitra , Michael Spannowsky , Philip Waite

Majorana neutrinos may have transitional dipole moments, which violate lepton number as well as lepton flavour. We estimate the sensitivity of future colliders to the electron-muon neutrino dipole moment, $\lambda_{e\mu}$, by considering…

High Energy Physics - Phenomenology · Physics 2025-04-07 Michele Frigerio , Natascia Vignaroli

The LHCb experiment at the Large Hadron Collider specialises in high-precision measurements of flavour physics with hadrons containing $b$ and $c$ quarks. Lepton flavour universality tests provide an accurate and clear approach to…

High Energy Physics - Experiment · Physics 2023-05-16 Alex Seuthe

Motivated by the notorious anomaly in the lepton flavor universality ratios $R_{D^{(*)}}$, we study the sensitivity of the Large Hadron Collider (LHC) to a low-mass charged Higgs boson $H^-$ lighter than $400\,$GeV in a generic two Higgs…

High Energy Physics - Phenomenology · Physics 2022-06-13 Monika Blanke , Syuhei Iguro , Hantian Zhang
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