Same-sign W pair production as a probe of double-parton scattering at the LHC

Gaunt, Jonathan R.; Kom, C. H.; Kulesza, Anna; Stirling, W. J.

doi:10.1140/epjc/s10052-010-1362-y

Cited by 151 publications

(242 citation statements)

References 48 publications

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“…W ± W ± pairs may also occur via two overlapping events: such events will mainly have low p T W s and possibly distinct production vertices. Double parton scattering will also lead to SSdB events at a rate somewhat lower than the qq → W ± W ± q ′ q ′ process [35]. Additional physics backgrounds come from tt production where a lepton from a daughter b is accidentally not isolated, from ttW production and from 4t production.…”

Section: Same-sign Diboson Signaturementioning

confidence: 99%

Radiatively-driven natural supersymmetry at the LHC

Baer

Barger

Huang

et al. 2013

J. High Energ. Phys.

112

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Radiatively-driven natural supersymmetry (RNS) potentially reconciles the Z and Higgs boson masses close to ∼ 100 GeV with gluinos and squarks lying beyond the TeV scale. Requiring no large cancellations at the electroweak scale in constructing M Z = 91.2 GeV while maintaining a light Higgs scalar with m h ≃ 125 GeV implies a sparticle mass spectrum including light higgsinos with mass ∼ 100 − 300 GeV, electroweak gauginos in the 300 − 1200 GeV range, gluinos at 1 − 4 TeV and top/bottom squarks in the 1-4 TeV range (probably beyond LHC reach), while first/second generation matter scalars can exist in the 5-30 TeV range (far beyond LHC reach). We investigate several characteristic signals for RNS at LHC14. Gluino pair production yields a reach up to mg ∼ 1.7 TeV for 300 fb −1 . Wino pair production -pp → W 2 Z 4 and W 2 W 2 -leads to a unique same-sign diboson (SSdB) signature accompanied by modest jet activity from daughter higgsino decays; this signature provides the best reach up to mg ∼ 2.1 TeV within this framework. Wino pair production also leads to final states with (W Z → 3ℓ) + E miss T as well as 4ℓ + E miss T which give confirmatory signals up to mg ∼ 1.4 TeV. Directly produced light higgsinos yield a clean, soft trilepton signature (due to very low visible energy release) which can be visible, but only for a not-too-small a Z 2 − Z 1 mass gap. The clean SSdB signal -as well as the distinctive mass shape of the dilepton mass distribution from Z 2,3 → Z 1 ℓℓ decays if this is accessible -will mark the presence of light higgsinos which are necessary for natural SUSY. While an e + e − collider operating with √ s ∼ 600 GeV should unequivocally reveal the predicted light higgsinos, the RNS model with m 1/2 1 TeV may elude all LHC14 search strategies even while maintaining a high degree of electroweak naturalness.-1 -

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Section: Same-sign Diboson Signaturementioning

confidence: 99%

Radiatively-driven natural supersymmetry at the LHC

Baer

Barger

Huang

et al. 2013

J. High Energ. Phys.

112

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“…The cross section of the DPS samples is estimated using its factorization into the product of two single scattering cross sections [56] and the effective area parameter for hard double-parton interactions recently measured by ATLAS [57].…”

Section: B Background Samplesmentioning

confidence: 99%

Measurements ofW±Zproduction cross sections inppcollisions ats=8<

Aad¹,

Abbott²,

Abdallah³

et al. 2016

Phys. Rev. D

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This paper presents measurements of W AE Z production in pp collisions at a center-of-mass energy of 8 TeV. The gauge bosons are reconstructed using their leptonic decay modes into electrons and muons. The data were collected in 2012 by the ATLAS experiment at the Large Hadron Collider and correspond to an integrated luminosity of 20.3 fb −1 . The measured inclusive cross section in the detector fiducial region is σ W AE Z→l 0 νll ¼ 35.1 AE 0.9ðstatÞ AE 0.8ðsysÞ AE 0.8ðlumiÞ fb, for one leptonic decay channel. In comparison, the next-to-leading-order Standard Model expectation is 30.0 AE 2.1 fb. Cross sections for W þ Z and W − Z production and their ratio are presented as well as differential cross sections for several kinematic observables. Limits on anomalous triple gauge boson couplings are derived from the transverse mass spectrum of the W AE Z system. From the analysis of events with a W and a Z boson associated with two or more forward jets an upper limit at 95% confidence level on the W AE Z scattering cross section of 0.63 fb, for each leptonic decay channel, is established, while the Standard Model prediction at next-to-leading order is 0.13 AE 0.01 fb. Limits on anomalous quartic gauge boson couplings are also extracted.

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“…in refs. [15][16][17]. The W + W − final states constitutes a background to the Higgs boson production.…”

Section: Jhep02(2015)098mentioning

confidence: 99%

W + W − pair production in proton-proton collisions: small missing terms

Łuszczak

Szczurek

Royon

2015

J. High Energ. Phys.

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W + W − production is one of the golden channels for testing the Standard Model as well for searches beyond the Standard Model. We discuss many new subleading processes for inclusive production of W + W − pairs generally not included in the literature so far. We focus on photon-photon induced processes. We include elastic-elastic, elastic-inelastic, inelastic-elastic and inelastic-inelastic contributions. We also calculate the contributions with resolved photons including the partonic substructure of the virtual photon. Predictions for the total cross section and differential distributions in W -boson rapidity and transverse momentum as well as W W invariant mass are presented. The γγ components constitute only about 1-2 % of the inclusive W + W − cross section but increases up to about 10 % at large W ± transverse momenta, and are even comparable to the dominant qq component at large M W W , i.e. are much larger than the gg → W + W − one.

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Same-sign W pair production as a probe of double-parton scattering at the LHC

Cited by 151 publications

References 48 publications

Radiatively-driven natural supersymmetry at the LHC

Radiatively-driven natural supersymmetry at the LHC

Measurements ofW±Zproduction cross sections inppcollisions ats=8<

W + W − pair production in proton-proton collisions: small missing terms

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