Search for heavy long-lived particles that decay to photons at CDF II

被引：18

作者：

Abulencia, A. ^{[1
]}

Adelman, J.

Affolder, T.

Akimoto, T.

Albrow, M. G.

Amerio, S.

Amidei, D.

Anastassov, A.

Anikeev, K.

Annovi, A.

Antos, J.

Aoki, M.

Apollinari, G.

Arisawa, T.

Artikov, A.

Ashmanskas, W.

Attal, A.

Aurisano, A.

Azfar, F.

Azzi-Bacchetta, P.

Azzurri, P.

Bacchetta, N.

Badgett, W.

Barbaro-Galtieri, A.

Barnes, V. E.

Barnett, B. A.

Baroiant, S.

Bartsch, V.

Bauer, G.

Beauchemin, P. -H.

Bedeschi, F.

Behari, S.

Bellettini, G.

Bellinger, J.

Belloni, A.

Benjamin, D.

Beretvas, A.

Beringer, J.

Berry, T.

Bhatti, A.

Binkley, M.

Bisello, D.

Bizjak, I.

Blair, R. E.

Blocker, C.

Blumenfeld, B.

Bocci, A.

Bodek, A.

Boisvert, V.

Bolla, G.

机构：

[1] Okayama Univ, Okayama 7008530, Japan

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 12期

基金：

英国科学技术设施理事会;

关键词：

D O I：

10.1103/PhysRevLett.99.121801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present the first search for heavy, long-lived particles that decay to photons at a hadron collider. We use a sample of gamma+jet+missing transverse energy events in p (p) over bar collisions at root s=1.96 TeV taken with the CDF II detector. Candidate events are selected based on the arrival time of the photon at the detector. Using an integrated luminosity of 570 pb(-1) of collision data, we observe 2 events, consistent with the background estimate of 1.3 +/- 0.7 events. While our search strategy does not rely on model-specific dynamics, we set cross section limits in a supersymmetric model with (chi) over tilde (0)(1)->gamma(G) over tilde and place the world-best 95% C.L. lower limit on the (chi) over tilde (0)(1) mass of 101 GeV/c(2) at tau(0)((chi) over tilde1)=5 ns.

引用

页数：7

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