SMEFTsim 3.0 — a practical guide

Brivio, Ilaria

doi:10.1007/jhep04(2021)073

Cited by 69 publications

(34 citation statements)

References 94 publications

(151 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…values for these K-factors, which have been obtained using SMEFTsim [85,151] interfaced with MadGraph5_aMC@NLO, with the analytic calculation presented in [27].…”

Section: Jhep07(2021)122mentioning

confidence: 99%

Parton distributions in the SMEFT from high-energy Drell-Yan tails

Greljo

Iranipour

Kassabov

et al. 2021

J. High Energ. Phys.

View full text Add to dashboard Cite

The high-energy tails of charged- and neutral-current Drell-Yan processes provide important constraints on the light quark and anti-quark parton distribution functions (PDFs) in the large-x region. At the same time, short-distance new physics effects such as those encoded by the Standard Model Effective Field Theory (SMEFT) would induce smooth distortions to the same high-energy Drell-Yan tails. In this work, we assess for the first time the interplay between PDFs and EFT effects for high-mass Drell-Yan processes at the LHC and quantify the impact that the consistent joint determination of PDFs and Wilson coefficients has on the bounds derived for the latter. We consider two well-motivated new physics scenarios: 1) electroweak oblique corrections ($$ \hat{W},\hat{Y} $$ W ̂ , Y ̂ ) and 2) four-fermion interactions potentially related to the LHCb anomalies in R(K(*)). We account for available Drell-Yan data, both from unfolded cross sections and from searches, and carry out dedicated projections for the High-Luminosity LHC. Our main finding is that, while the interplay between PDFs and EFT effects remains moderate for the current dataset, it will become a significant challenge for EFT analyses at the HL-LHC.

show abstract

“…values for these K-factors, which have been obtained using SMEFTsim [85,151] interfaced with MadGraph5_aMC@NLO, with the analytic calculation presented in [27].…”

Section: Jhep07(2021)122mentioning

confidence: 99%

Parton distributions in the SMEFT from high-energy Drell-Yan tails

Greljo

Iranipour

Kassabov

et al. 2021

J. High Energ. Phys.

View full text Add to dashboard Cite

show abstract

“…[78] in order to put upper bounds on [ us X ] τ α (X = S, P ). We simulate the new physics signal (τ + MET) in MadGraph 5 v 2.9.2 [95] with the SMEFTsim plugin [96,97] for the hard process, Pythia v 8.2 [98] for the showering and hadronization, and Delphes v 3.4.2 [99] as a simple detector simulation. In Delphes, we use the default implementation of the ATLAS detector, but we set the tau tagging efficiency to one in order to prevent Delphes from discarding events.…”

Section: Collider Boundsmentioning

confidence: 99%

EFT at FASERν

Falkowski

González–Alonso

Kopp

et al. 2021

J. High Energ. Phys.

View full text Add to dashboard Cite

We investigate the sensitivity of the FASERν detector to new physics in the form of non-standard neutrino interactions. FASERν, which will be installed 480 m downstream of the ATLAS interaction point, will for the first time study interactions of multi-TeV neutrinos from a controlled source. Our formalism — which is applicable to any current and future neutrino experiment — is based on the Standard Model Effective Theory (SMEFT) and its counterpart, Weak Effective Field Theory (WEFT), below the electroweak scale. Starting from the WEFT Lagrangian, we compute the coefficients that modify neutrino production in meson decays and detection via deep-inelastic scattering, and we express the new physics effects in terms of modified flavor transition probabilities. For some coupling structures, we find that FASERν will be able to constrain interactions that are two to three orders of magnitude weaker than Standard Model weak interactions, implying that the experiment will be indirectly probing new physics at the multi-TeV scale. In some cases, FASERν constraints will become comparable to existing limits — some of them derived for the first time in this paper — already with 150 fb−1 of data.

show abstract

“…The most commonly employed UFO models are SMEFT [3,23] and SMEFT@NLO [24]. Both implementations use the Warsaw basis of dimension-6 operators [25] and were validated using the dedicated protocol suggested in [26].…”

Section: Pos(lhcp2021)078mentioning

confidence: 99%