# Search for High-Mass e+e- Resonances in pp̅ Collisions at √s=1.96  TeV

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http://hdl.handle.net/10138/25904

#### Citation

Aaltonen , T , Mehtälä , P , Orava , R , Mäki , T , Saarikko , H , Österberg , K & CDF Collaboration 2009 , ' Search for High-Mass e+e- Resonances in pp̅ Collisions at √s=1.96  TeV ' , Physical Review Letters , vol. 102 , no. 3 , pp. 031801 . https://doi.org/10.1103/PhysRevLett.102.031801

 Title: Search for High-Mass e+e- Resonances in pp̅ Collisions at √s=1.96  TeV Alternative title: Search for High-Mass \boldmath$e^+e^-$ Resonances in \boldmath$p\bar{p}$ Collisions at \boldmath$\sqrt{s}=$1.96 TeV Author: Aaltonen, T.; Mehtälä, Petteri; Orava, Risto; Mäki, Tuula; Saarikko, Heimo; Österberg, Kenneth; CDF Collaboration Contributor organization: Helsinki Institute of PhysicsDepartment of PhysicsParticle Physics and Astrophysics Date: 2009 Language: eng Number of pages: 8 Belongs to series: Physical Review Letters ISSN: 0031-9007 DOI: https://doi.org/10.1103/PhysRevLett.102.031801 URI: http://hdl.handle.net/10138/25904 Abstract: A search for high-mass resonances in the $e^+e^-$ final state is presented based on 2.5 fb$^{-1}$ of $\sqrt{s}=$1.96 TeV $p\bar{p}$ collision data from the CDF II detector at the Fermilab Tevatron. The largest excess over the standard model prediction is at an $e^+e^-$ invariant mass of 240 GeV/$c^2$. The probability of observing such an excess arising from fluctuations in the standard model anywhere in the mass range of 150--1,000 GeV/$c^2$ is 0.6% (equivalent to 2.5 $\sigma$). We exclude the standard model coupling $Z'$ and the Randall-Sundrum graviton for $k/\overline{M}_{Pl}=0.1$ with masses below 963 and 848 GeV/$c^2$ at the 95% credibility level, respectively.A search for high-mass resonances in the e+e- final state is presented based on 2.5  fb-1 of √s=1.96  TeV pp̅ collision data from the CDF II detector at the Fermilab Tevatron. The largest excess over the standard model prediction is at an e+e- invariant mass of 240  GeV/c2. The probability of observing such an excess arising from fluctuations in the standard model anywhere in the mass range of 150–1000  GeV/c2 is 0.6% (equivalent to 2.5σ). We exclude the standard model coupling Z′ and the Randall-Sundrum graviton for k/M̅ Pl=0.1 with masses below 963 and 848  GeV/c2 at the 95% credibility level, respectively. Subject: 114 Physical sciences hep-ex Peer reviewed: Yes Usage restriction: restrictedAccess Self-archived version: submittedVersion
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