Search for New Heavy Particles Decaying to Z0 Z0 to Llll, Lljj in P Pbar Collisions at Sqrt(s)
Title | Search for New Heavy Particles Decaying to Z0 Z0 to Llll, Lljj in P Pbar Collisions at Sqrt(s) PDF eBook |
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Release | 2011 |
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We report on a search for anomalous production of Z pairs through a massive resonance decay in data corresponding to 2.5-2.9 fb−1 of integrated luminosity in p{bar p} collisions at √s = 1.96 TeV using the CDF II detector at the Fermilab Tevatron. This analysis, with more data and channels where the Z bosons decay to muons or jets, supersedes the 1.1 fb−1 four-electron channel result previously published by CDF. In order to maintain high efficiency for muons, we use a new forward tracking algorithm and muon identification requirements optimized for these high signal-to-background channels. Predicting the dominant backgrounds in each channel entirely from sideband data samples, we observe four-body invariant mass spectra above 300 GeV/c2 that are consistent with background. We set limits using the acceptance for a massive graviton resonance that are 7-20 times stronger than the previously published direct limits on resonant ZZ production.
Search for New Heavy Particles Decaying to Z0 Z0 ---] Eeee in P - Anti-p Collisions at S**ư
Title | Search for New Heavy Particles Decaying to Z0 Z0 ---] Eeee in P - Anti-p Collisions at S**ư PDF eBook |
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Pages | 12 |
Release | 2008 |
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We report the results of a search for the anomalous production of a massive particle decaying to four electrons via two Z° bosons in 1.1 fb−1 of p{bar p} collisions at √s =1.96 TeV collected by the CDF II detector at Fermilab. We employ optimized electron identification criteria to maximize acceptance and efficiency. We estimate the backgrounds in the invariant mass range 500-1000 GeV/c2 to be 0.028 ± 0.009 (stat) ± 0.011 (syst) events. We observe zero events in this search region. Assuming a Randall-Sundrum graviton production model, we set 95% CL limits on? x BF(G → Z°Z°)
Search for New Heavy Particles Decaying to Z0 Z0 ---] Eeee in P - Anti-p Collisions at S**1/2
Title | Search for New Heavy Particles Decaying to Z0 Z0 ---] Eeee in P - Anti-p Collisions at S**1/2 PDF eBook |
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Pages | 12 |
Release | 2008 |
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We report the results of a search for the anomalous production of a massive particle decaying to four electrons via two Z° bosons in 1.1 fb−1 of p{bar p} collisions at √s =1.96 TeV collected by the CDF II detector at Fermilab. We employ optimized electron identification criteria to maximize acceptance and efficiency. We estimate the backgrounds in the invariant mass range 500-1000 GeV/c2 to be 0.028 ± 0.009 (stat) ± 0.011 (syst) events. We observe zero events in this search region. Assuming a Randall-Sundrum graviton production model, we set 95% CL limits on [sigma] x BF(G → Z°Z°)
Search for New Particles Decaying to Dijets in Pbar P Collisions at Radicals
Title | Search for New Particles Decaying to Dijets in Pbar P Collisions at Radicals PDF eBook |
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Release | 1994 |
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Search for Heavy Resonances Decaying to Z($\nu\bar\nu}$)V(q$\bar{q}$') in Proton-proton Collisions at $\sqrts}$
Title | Search for Heavy Resonances Decaying to Z($\nu\bar\nu}$)V(q$\bar{q}$') in Proton-proton Collisions at $\sqrts}$ PDF eBook |
Author | Armen Tumasyan |
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Pages | 0 |
Release | 2021 |
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Search for Heavy, Long-lived Particles that Decay to Photons in Ppbar Collisions at Sqrt(s)
Title | Search for Heavy, Long-lived Particles that Decay to Photons in Ppbar Collisions at Sqrt(s) PDF eBook |
Author | Peter Wagner |
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Release | 2010 |
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This dissertation presents the results of the first search for heavy, neutral, longlived particles that decay to photons at a hadron collider. We use a sample of +jet+missing transverse energy events in pp̄ collisions at s = 1.96 TEV taken with the Collider Detector at Fermilab. Candidate events are selected based on the arrival time of a high-energy photon at the electromagnetic calorimeter as measured with a timing system that was recently installed. The final result is that we find 2 events, using 570"34 pb−1 of data collected during 2004-2005 at the Fermilab Tevatron, consistent with the background estimate of 1.3"0.7 events.
Search for a Heavy Resonance Decaying Into a Z+jet Final State in P Anti-p Collisions at S**1/2
Title | Search for a Heavy Resonance Decaying Into a Z+jet Final State in P Anti-p Collisions at S**1/2 PDF eBook |
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Pages | 8 |
Release | 2006 |
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We have searched for a heavy resonance decaying into a Z+jet final state in p{bar p} collisions at a center of mass energy of 1.96 TeV at the Fermilab Tevatron collider using the D0 detector. No indication for such a resonance was found in a data sample corresponding to an integrated luminosity of 370 pb−1. We set upper limits on the cross section times branching fraction for heavy resonance production at the 95% C.L. as a function of the resonance mass and width. The limits are interpreted within the framework of a specific model of excited quark production.