Highpt: A Tool for High-Pt Drell-Yan Tails Beyond the Standard Model

Allwicher, Lukas; Faroughy, Darius A.; Jaffredo, Florentin; Sumensari, Olcyr; Wilsch, Felix

doi:10.2139/ssrn.4360930

2023

DOI: 10.2139/ssrn.4360930

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Highpt: A Tool for High-Pt Drell-Yan Tails Beyond the Standard Model

Lukas Allwicher

Darius A. Faroughy

Florentin Jaffredo³

et al.

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Cited by 3 publications

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Drell-Yan tails beyond the Standard Model

Allwicher

Faroughy

Jaffredo

et al. 2023

J. High Energ. Phys.

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We investigate the high-pT tails of the pp → ℓν and pp → ℓℓ Drell-Yan processes as probes of New Physics in semileptonic interactions with an arbitrary flavor structure. For this purpose, we provide a general decomposition of the 2 → 2 scattering amplitudes in terms of form-factors that we match to specific scenarios, such as the Standard Model Effective Field Theory (SMEFT), including all relevant operators up to dimension-8, as well as ultraviolet scenarios giving rise to tree-level exchange of new bosonic mediators with masses at the TeV scale. By using the latest LHC run-II data in the monolepton (eν, μν, τν) and dilepton (ee, μμ, ττ, eμ, eτ, μτ) production channels, we derive constraints on the SMEFT Wilson coefficients for semileptonic four-fermion and dipole operators with the most general flavor structure, as well as on all possible leptoquark models. For the SMEFT, we discuss the range of validity of the EFT description, the relevance of $$ \mathcal{O} $$ O (1/Λ2) and $$ \mathcal{O} $$ O (1/Λ4) truncations, the impact of d = 8 operators and the effects of different quark-flavor alignments. Finally, as a highlight, we extract for several New Physics scenarios the combined limits from high-pT processes, electroweak pole measurements and low-energy flavor data for the b → cτν transition, showing the complementarity between these different observables. Our results are compiled in HighPT (https://highpt.github.io), a package in Mathematica which provides a simple way for users to extract the Drell-Yan tails likelihoods for semileptonic effective operators and for leptoquark models.

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Drell-Yan tails beyond the Standard Model

Allwicher

Faroughy

Jaffredo

et al. 2023

J. High Energ. Phys.

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Phenomenology of a Deconstructed Electroweak Force

Davighi,

Gosnay,

Miller

et al. 2024

J. High Energ. Phys.

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We study an effective theory of flavour in which the SU(2)L interaction is ‘flavour-deconstructed’ near the TeV scale. This arises, for example, in UV models that unify all three generations of left-handed fermions via an Sp(6)L symmetry. Flavour-universality of the electroweak force emerges accidentally (but naturally) from breaking the $$ {\prod}_{i=1}^3\textrm{SU}{(2)}_{L,i} $$ ∏ i = 1 3 SU 2 L , i gauge group to its diagonal subgroup, delivering hierarchical fermion masses and left-handed mixing angles in the process. The heavy gauge bosons transform as two SU(2)L triplets that mediate new flavour non-universal forces. The lighter of these couples universally to the light generations, allowing consistency with flavour bounds even for a TeV scale mass. Constraints from flavour, high mass LHC searches, and electroweak precision are then highly complementary, excluding masses below 9 TeV. The heavier triplet must instead be hundreds of TeV to be consistent with meson mixing constraints. Because only the lighter triplet couples to the Higgs, we find radiative Higgs mass corrections of a few hundred GeV, meaning this model of flavour is arguably natural. The natural region will, however, be almost completely covered by the planned electroweak programme at FCC-ee. On shorter timescales, significant parameter space will be explored by the High-Luminosity LHC measurements at high-pT, and upcoming lepton flavour violation experiments, principally Mu3e.

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Theoretical underpinnings of CP-violation at the high-energy frontier

Bar-Shalom,

Soni,

Wudka

2025

Physics Letters B

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Highpt: A Tool for High-Pt Drell-Yan Tails Beyond the Standard Model

Cited by 3 publications

References 49 publications

Drell-Yan tails beyond the Standard Model

Drell-Yan tails beyond the Standard Model

Phenomenology of a Deconstructed Electroweak Force

Theoretical underpinnings of CP-violation at the high-energy frontier

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