Slepton pair production with aNNLO+NNLL precision

Fiaschi, Juri; Klasen, M.; Sunder, Marthijn

doi:10.1007/jhep04(2020)049

Cited by 16 publications

(17 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The corresponding K-factor for the LHC with √ s = 13 TeV is the same as for slepton pair production, as both the scalars φ and sleptons carry only electroweak quantum numbers. 5 The resulting values are modest: K = 1.18 at NLO [150], with small corrections of order a percent arising from next-to-leading logarithm (NNL) and next-to-next-to-leading logarithmic (NNLL) resummations matched to approximate next-to-next-to-leading order (aNNLO) QCD corrections [151]. To my knowledge, the corresponding computations do not exist for the HL-LHC or a 100 TeV pp collider, so for purposes of comparison among the different collider options I do not apply a K-factor correction for the HL-LHC results.…”

Section: Jhep09(2020)179mentioning

confidence: 99%

The electroweak phase transition: a collider target

Ramsey-Musolf

2020

J. High Energ. Phys.

100

View full text Add to dashboard Cite

Determining the thermal history of electroweak symmetry breaking (EWSB) is an important challenge for particle physics and cosmology. Lattice simulations indicate that EWSB in the Standard Model (SM) occurs through a crossover transition, while the presence of new physics beyond the SM could alter this thermal history. The occurrence of a first order EWSB transition would be particularly interesting, providing the needed pre-conditions for generation of the cosmic matter-antimatter asymmetry and sources for potentially observable gravitational radiation. I provide simple, generic arguments that if such an alternate thermal history exists, the new particles involved cannot be too heavy with respect to the SM electroweak temperature, nor can they interact too feebly with the SM Higgs boson. These arguments do not rely on the decoupling limit. I derive corresponding quantitative expectations for masses and interaction strengths which imply that their effects could in principle be observed (or ruled out) by prospective next generation high energy colliders. The simple, generic arguments provide a quantitative, parametric understanding of results obtained in a wide range of explicit model studies; relate them explicitly to the electroweak temperature; and delineate broad contours of collider phenomenology pertaining to a non-standard history of EWSB.

show abstract

Section: Jhep09(2020)179mentioning

confidence: 99%

The electroweak phase transition: a collider target

Ramsey-Musolf

2020

J. High Energ. Phys.

100

View full text Add to dashboard Cite

show abstract

“…that has to be performed for the resummed and the perturbatively expanded results in Mellin space can be found in Ref. [69].…”

Section: Analytical Approachmentioning

confidence: 99%

“…In this paper, we take our precision calculations for higgsino and gaugino pair production to the next level by resumming not only the leading and next-to-leading logarithms (NLL), but also the next-to-next-to-leading logarithms (NNLL) and matching them not only to the full NLO QCD and SUSY-QCD corrections, but also an approximate next-to-next-to-leading order (aNNLO) calculation in QCD. The corresponding analytical formulae are available in the literature [66][67][68][69], so that we collect here only the most important results required at NNLL accuracy. Similar calculations, based on full NLO SUSY-QCD and aNNLO QCD calculations [28,29], have also been performed previously for sleptons [69] as well as for squarks, gluinos [48] and stops [53] and are available through the public codes RESUMMINO [58] and NNLL-fast [51].…”

Section: Introductionmentioning

confidence: 99%

“…The corresponding analytical formulae are available in the literature [66][67][68][69], so that we collect here only the most important results required at NNLL accuracy. Similar calculations, based on full NLO SUSY-QCD and aNNLO QCD calculations [28,29], have also been performed previously for sleptons [69] as well as for squarks, gluinos [48] and stops [53] and are available through the public codes RESUMMINO [58] and NNLL-fast [51]. Other groups have employed soft-collinear effective theory for sleptons [43], squarks [70], gluinos [50] and stops [52,71] with similar conclusions.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Higgsino and gaugino pair production at the LHC with aNNLO+NNLL precision

Fiaschi

Klasen

2020

Phys. Rev. D

Self Cite

View full text Add to dashboard Cite

We present a calculation of higgsino and gaugino pair production at the LHC at next-to-nextto-leading logarithmic (NNLL) accuracy, matched to approximate next-to-next-to-leading order (aNNLO) QCD corrections. We briefly review the formalism for the resummation of large threshold logarithms and highlight the analytical results required at aNNLO+NNLO accuracy. Our numerical results are found to depend on the mass and nature of the produced charginos and neutralinos. The differential and total cross sections for light higgsinos, which like sleptons are produced mostly at small x and in the s-channel, are found to be again moderately increased with respect to our previous results. The differential and total cross sections for gauginos are, however, not increased any more due to the fact that gauginos, like squarks, are now constrained by ATLAS and CMS to be heavier than about 1 TeV, so that also t-and u-channels play an important role.The valence quarks probed at large x then also induce substantially different cross sections for positively and negatively charged gauginos. The higgsino and gaugino cross sections are both further stabilized at aNNLO+NNLL with respect to the variation of renormalization and factorization scales. We also now take mixing in the squark sector into account and study the dependence of the total cross sections on the squark and gluino masses as well as the trilinear coupling controlling the mixing in particular in the sbottom sector.

show abstract

“…However resolutions to the g − 2 anomalies can simultaneously be accommodated when the chargino, neutralino and sleptons are very light (∼ O(100) GeV) [70]. The collider experiments are expected to impose strong constraints on such solutions, especially during the LHC-Run3 [71].…”

Section: Introductionmentioning

confidence: 99%

Electron and muon magnetic moments and implications for dark matter and model characterisation in non-universal U(1)′ supersymmetric models

Frank

Hiçyılmaz

Mondal

et al. 2021

J. High Energ. Phys.

View full text Add to dashboard Cite

We attribute deviations of the muon and electron magnetic moments from the theoretical predictions to the presence of an additional U(1)′ supersymmetric model. We interpret the discrepancies between the muon and electron anomalous magnetic moments to be due to the presence of non-universal U(1)′ charges. In a minimally extended model, we show that requiring both deviations to be satisfied imposes constraints on the spectrum of the model, in particular on dark matter candidates and slepton masses and ordering. Choosing three benchmarks with distinct dark matter features, we study implications of the model at colliders, concentrating on variables that can distinguish our non-universal scenario from other U(1)′ implementations.

show abstract

Slepton pair production with aNNLO+NNLL precision

Cited by 16 publications

References 55 publications

The electroweak phase transition: a collider target

The electroweak phase transition: a collider target

Higgsino and gaugino pair production at the LHC with aNNLO+NNLL precision

Electron and muon magnetic moments and implications for dark matter and model characterisation in non-universal U(1)′ supersymmetric models

Contact Info

Product

Resources

About