On the EFT validity for Drell–Yan tails at the LHC

The European Physical Journal C, vol. 85

Abstract

Abstract In this article, we examine the validity range of the Effective Field Theory (EFT) description of high-energy Drell–Yan processes at the LHC. To this purpose, we consider explicit mediators that contribute to these processes in the s - and t -channels, comparing their effects in Drell–Yan distributions with the ones obtained by matching onto the corresponding EFT. We determine the conditions for the EFT results to accurately describe these scenarios. In particular, we explore the impact of including dimension-eight $$(d=8)$$ ( d = 8 ) operators in the faster convergence of the EFT series, at the analytical and numerical level, considering contributions to the cross section up to the square of $$d=8$$ d = 8 EFT operator insertions. Moreover, we discuss the possible implications of clipping LHC data and illustrate results for a specific New-Physics scenario motivated by low-energy flavor data.

Authors 5

1. Lukas Allwicher

   Deutsches Elektronen-Synchrotron DESY

   Affiliation as printed

   Deutsches Elektronen-Synchrotron DESY

2. Darius A. Faroughy

   Rutgers, The State University of New Jersey

   Affiliation as printed

   Rutgers University

3. Matheus Martines

   Centre National de la Recherche Scientifique · Universidade de São Paulo · Université Paris-Saclay · Institut National de Physique Nucléaire et de Physique des Particules

   Affiliation as printed

   CNRS/IN2P3 et Université Paris-Saclay

   Universidade de São Paulo

4. Olcyr Sumensari

   Centre National de la Recherche Scientifique · Université Paris-Saclay · Institut National de Physique Nucléaire et de Physique des Particules

   Affiliation as printed

   CNRS/IN2P3 et Université Paris-Saclay

5. Felix Wilsch corresponding Aachen

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University