Electroweak corrections and Bloch-Nordsieck violations in 2-to-2 processes at the LHC

Stirling, W. J.; Vryonidou, Eleni

doi:10.1007/jhep04(2013)155

Cited by 33 publications

(15 citation statements)

References 28 publications

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“…There is a well known cancellation between real and virtual emission so that as the p T become larger these tree level calculations are not reliable [44][45][46][47]. Due these simplifying assumptions, our estimates are only accurate up to O(1) numbers.…”

Section: Resultsmentioning

confidence: 88%

Unbroken SU(2) at a 100 TeV collider

Hook

Katz²

2014

J. High Energ. Phys.

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A future 100 TeV pp collider will explore energies much higher than the scale of electroweak (EW) symmetry breaking. In this paper we study some of the phenomenological consequences of this fact, concentrating on enhanced bremsstrahlung of EW gauge bosons. We survey a handful of possible new physics experimental searches one can pursue at a 100 TeV collider using this phenomenon. The most dramatic effect is the non-negligible radiation of EW gauge bosons from neutrinos, making them partly visible objects. The presence of collinear EW radiation allows for the full reconstruction of neutrinos under certain circumstances. We also show that the presence of EW radiation allows one to distinguish the SU(2) quantum numbers of various new physics particles. We consider examples of two completely different new physics paradigms, additional gauge groups and SUSY, where the bremsstrahlung radiation of W and Z from W s, Z s or stops allows one to determine the couplings and the mixing angles of the new particles (respectively). Finally, we show how the emission of W s and Zs from high p T Higgs bosons can be used to test the couplings of new physics to the Higgs boson.

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Section: Resultsmentioning

confidence: 88%

Unbroken SU(2) at a 100 TeV collider

Hook

Katz²

2014

J. High Energ. Phys.

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“…There are lots of infrared issues here, similar to those for the Photon in the Standard Model or Quantum Electrodynamics. Those gave rise to the Block-Nordsieck treatment [22], and these Photinos look like they might have similar issues.…”

Section: Resultsmentioning

confidence: 99%

The SSM with Suppressed SUSY Charge

Dixon

2016

Physics Letters B

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An earlier paper showed that it is possible to write down new SUSY Actions in which it is not possible to define a Supersymmetry Charge. SUSY is defined in these new Actions by the fact that they satisfy Master Equations. The new SUSY Actions are very easy to write down. One simply takes a Chiral SUSY Action, coupled to Gauge and other Chiral Multiplets, and even Supergravity, if desired. Then one creates a new Action from this by exchanging all or part of the Scalar Field S for a new Zinn Source J, and the corresponding part of the Zinn Source Γ for a new Antighost Field η. Since the original Action satisfies a Master Equation, this exchange guarantees that the new Action will satisfy the new Master Equation. As was shown in the earlier paper, the new multiplets have fewer bosonic degrees of freedom than fermionic degrees of freedom. This is possible because they do not have a Supercharge.The resulting new SSM has no need for Squarks or Sleptons. It does not need spontaneous breaking of SUSY, so that the cosmological constant problem does not arise (at least at tree level). It mimics the usual non-supersymmetric Standard Model very well, and the absence of large flavour changing neutral currents is natural. There is no need for a hidden sector, or a messenger sector, or explicit 'soft' breaking of SUSY. Spontaneous Gauge Symmetry Breaking from SU (3) × SU (2) × U (1) to SU (3) × U (1) implies the existence of two new very heavy Higgs Bosons with mass 13.4 TeV, slightly smaller than the energy of the LHC at 14 TeV. There is also a curious set of Gauginos and Higgsinos which have exactly the same masses as the Higgs and Gauge Bosons. These do not couple to the Quarks and Leptons, except through the Higgs and Gauge

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“…The Sudakov logarithms basically correspond to the infrared regime of the virtual one loop weak corrections, where the gauge boson masses can be neglected if compared to the other energy scales involved. In the Sudakov limit the weak boson masses play the role of physical regulators for the infrared singularities of the loop diagrams, which in turn manifest themselves as logarithms of the energy scale over the infrared cutoffs M W and M Z [88][89][90][91][92][93][94][95][96]. The Sudakov corrections are negative and usually have a moderate impact on the total cross sections.…”

Section: A Physical Motivationsmentioning

confidence: 99%

Automation of electroweak corrections for LHC processes

Chiesa

Greiner²,

Tramontano

2015

J. Phys. G: Nucl. Part. Phys.

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For the Run 2 of the LHC next-to-leading order electroweak corrections will play an important role. Even though they are typically moderate at the level of total cross sections they can lead to substantial deviations in the shapes of distributions. In particular for new physics searches but also for a precise determination of Standard Model observables their inclusion in the theoretical predictions is mandatory for a reliable estimation of the Standard Model contribution. In this article we review the status and recent developments in electroweak calculations and their automation for LHC processes. We discuss general issues and properties of NLO electroweak corrections and present some examples, including the full calculation of the NLO corrections to the production of a W -boson in association with two jets computed using GoSam interfaced to MadDipole.

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Electroweak corrections and Bloch-Nordsieck violations in 2-to-2 processes at the LHC

Cited by 33 publications

References 28 publications

Unbroken SU(2) at a 100 TeV collider

Unbroken SU(2) at a 100 TeV collider

The SSM with Suppressed SUSY Charge

Automation of electroweak corrections for LHC processes

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