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doi:10.1103/physrevlett.95.249905

Cited by 23 publications

(21 citation statements)

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“…A detailed analysis of the Drell-Yan cross section for the process pp → Z ′ → ℓ + ℓ − as a function of M Z ′ in StSM is given in Fig.(1). The analysis is done at √ s = 1.96 TeV, with a flat K factor of 1.3 for the appropriate comparisons with other models and with the CDF [32] and D0 [33] combined data in the dilepton channel. (For more recent CDF data, see [34].)…”

Section: Probing Narrow Z ′ Resonance At Tevatronmentioning

confidence: 99%

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Hidden Sector Models and Signatures

Liu

2010

Nuclear Physics B - Proceedings Supplements

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In the Stueckelberg extension of the Standard Model (StSM), matter in the hidden sector can act as dark matter. Due to an interplay of mixings produced by the usual Higgs mechanism and the Stueckelberg mechanism in the neutral gauge boson sector, the hidden sector matter acquires a milli charge. The Stueckelberg extension also produces a narrow width Z prime which is detectable at the Large Hadron Collider. The hidden sector dark matter naturally explains the PAMELA positron excess by means of a Breit-Wigner enhancement through a Z prime resonance. We also discuss the origin of milli charge in the context of the kinetic mixing and the Stueckelberg mixing.Comment: 10 pages, 8 figures, based on a talk presented at BSM-LHC 09; Boston, 2-4 June, 200

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Section: Probing Narrow Z ′ Resonance At Tevatronmentioning

confidence: 99%

“…An exhibition of the Z ′ leptonic signal for different ǫ values in StSM, in comparison with the CDF[32] data with 200 pb −1 and D0[33] data with 246-275 pb −1 . The data (at 95% C.L.)…”

mentioning

confidence: 99%

Hidden Sector Models and Signatures

Liu

2010

Nuclear Physics B - Proceedings Supplements

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“…The most stringent direct limits on new neutral resonances come from searches at the Tevatron. Run II searches at the CDF and D0 experiments have probed resonance decays to pairs of electrons [37,38,39,40,41,42], muons [39,41,42], taus [42,43,44,45], light quarks [42,46], top quarks [42,47], gluons [42,46], photons [40,41,42,48], and W [49] and Z [50] bosons. The most sensitive searches use long-lived final-state particles, while other searches cover parameter space where couplings to long-lived particles are suppressed.…”

Section: Collider Searches For Neutral Resonancesmentioning

confidence: 99%

New Techniques in the Search for Z′ Bosons and Other Neutral Resonances

2009

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The search for neutral resonances at the energy frontier has a long and illustrious history, resulting in multiple discoveries. The canonical search scans the reconstructed invariant mass distribution of identified fermion pairs. Two recent analyses from the CDF experiment at the Fermilab Tevatron have applied novel methods to resonance searches. One analysis uses simulated templates to fit the inverse mass distribution of muon pairs, a quantity with approximately constant resolution for momenta measured with a tracking detector. The other analysis measures the angular distribution of electron pairs as a function of dielectron mass, gaining sensitivity over a probe of the mass spectrum alone. After reviewing several models that predict new neutral resonances, we discuss these CDF analyses and potential future applications.

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“…[9][10][11], and experimental angular analysis were attempted at the Tevatron in Ref. [12]. A potential difficulty of the direct-fit angular analysis at the LHC is that generally, due to the symmetry of the proton-proton initial configuration, the determination on an event-by-event basis of the direction of the initial parton, hence of the sign of cos θ, is in principle not fully unambiguous, so that cuts in phase space must be applied in this regard.…”

Section: Introductionmentioning

confidence: 99%