Gluino-pair production at the Tevatron

Beenakker, W.; Höpker, R.; Spira, M.; Zerwas, P.M.

doi:10.1007/s002880050016

Cited by 62 publications

(79 citation statements)

References 14 publications

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“…For the sake of simplicity we dene the eective couplings e (Q 2 ) and^ e (Q 2 ) in the limit of on-shell quarks/squarks and almost on-shell gluons/gluinos, with virtuality Q 2 m 2q = m 2 q ; in this limit the couplings do not contain gauge-dependent terms. In the M S scheme we nd, after charge renormalization: : (16) The singular term 1= " represents the combination 1=" E + log(4). The remaining 1=" poles are IR and collinear singularities.…”

Section: Renormalization Of Uv Divergencesmentioning

confidence: 99%

“…Only recently have the predictions been improved by next-to-leading order (NLO) SUSY-QCD corrections for squark{antisquark [15] and gluino-pair production [16] in p p collisions 2 . In the present paper we give a systematic analysis of the next-to-leading order SUSY-QCD corrections of all possible supersymmetric pair channels, p p=pp !qq;q q;qg;gg+X ( q6 =t ) (1) in the proton{antiproton collisions at the Tevatron and the proton{proton collisions at the LHC.…”

Section: Introductionmentioning

confidence: 99%

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Squark and gluino production at hadron colliders

1997

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We h a v e determined the theoretical predictions for the cross-sections of squark and gluino production at p p and pp colliders (Tevatron and LHC) in next-to-leading order of supersymmetric QCD. By reducing the dependence on the renormalization/factorization scale considerably, the theoretically predicted values for the cross-sections are much more stable if these higher-order corrections are implemented. If squarks and gluinos are discovered, this improved stability translates into a reduced error on the masses, as extracted experimentally from the size of the production cross-sections. The cross-sections increase signicantly if the next-to-leading order corrections are included at a renormalization/factorization scale near the average mass of the produced massive particles. This rise results in improved lower bounds on squark and gluino masses. By contrast, the shape of the transverse-momentum and rapidity distributions remains nearly unchanged when the next-to-leading order corrections are included.Research supported by a fellowship of the Royal Dutch Academy of Arts and Sciences.

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Section: Renormalization Of Uv Divergencesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Squark and gluino production at hadron colliders

1997

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“…For example, the original theoretical studies of squark production at hadron colliders usually assume degenerate squark masses [20][21][22][23][24]. The NLO computation of stop pair production allows for separate stop masses [25].…”

Section: Introductionmentioning

confidence: 99%

Automated third generation squark production to next-to-leading order

Gonçalves

López-Val

Mawatari³

et al. 2014

Phys. Rev. D

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If light-flavor squarks and gluinos are indeed heavy and chargino pair production is plagued with overwhelming backgrounds, pair production and associated production of stops and charginos will become the key signatures in the upcoming LHC runs. We present fully automated next-to-leading order predictions for heavy flavor squark production at the LHC, including stop-chargino associated production, based on MadGolem. We compute the total and differential NLO rates for a variety of MSSM scenarios with a light third generation. We focus on theoretical uncertainties on differential rates, including a comparison to multi-jet merging and the impact of bottom parton densities for stop-chargino associated production. We find that for the associated production channel the rates can reach tens of femtobarns, but the scale dependence does not provide a conservative estimate of the theoretical uncertainties. Contents

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“…The mass bounds are deduced from the comparison of experimental cross section exclusion limits and theoretical cross section predictions. So far, the interpretation of the experimental search results have relied on calculations of the squark and gluino cross sections at next-to-leading order (NLO) in SUSY-QCD [9][10][11][12]. Recently, the accuracy of these cross section predictions has been improved further by the resummation of soft-gluon emission to all orders in perturbation theory [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Improved squark and gluino mass limits from searches for supersymmetry at hadron colliders

Beenakker¹,

Brensing²,

D’Onofrio

et al. 2012

Phys. Rev. D

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Squarks and gluinos have been searched for at hadron colliders in events with multiple jets and missing transverse energy. No excess has been observed to date, and from a comparison of experimental cross section limits and theoretical cross section predictions one can deduce lower bounds on the squark and gluino masses. We present an improved analysis of squark and gluino mass bounds which is based on state-of-the-art cross section calculations including the summation of large threshold corrections. For illustration, we consider experimental data obtained by the CDF collaboration at the Fermilab Tevatron and discuss the impact of the improved cross section predictions on the squark and gluino mass limits.

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Gluino-pair production at the Tevatron

Cited by 62 publications

References 14 publications

Squark and gluino production at hadron colliders

Squark and gluino production at hadron colliders

Automated third generation squark production to next-to-leading order

Improved squark and gluino mass limits from searches for supersymmetry at hadron colliders

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