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Type: Artigo de periódico
Title: Search for the Rare Decays K-L -> pi(0)pi(0)mu(+)mu(-) and K-L -> pi(0)pi X-0(0) -> pi(0)pi(0)mu(+)mu(-)
Author: Abouzaid, E
Arenton, M
Barker, AR
Bellantoni, L
Blucher, E
Bock, GJ
Cheu, E
Coleman, R
Corcoran, MD
Cox, B
Erwin, AR
Escobar, CO
Glazov, A
Golossanov, A
Gomes, RA
Gouffon, P
Hsiung, YB
Jensen, DA
Kessler, R
Kotera, K
Ledovskoy, A
McBride, PL
Monnier, E
Nguyen, H
Niclasen, R
Phillips, DG
Ping, H
Ramberg, EJ
Ray, RE
Ronquest, M
Santos, E
Slater, W
Smith, D
Solomey, N
Swallow, EC
Toale, PA
Tschirhart, R
Velissaris, C
Wah, YW
Wang, J
White, HB
Whitmore, J
Wilking, MJ
Winston, R
Worcester, ET
Worcester, M
Yamanaka, T
Zimmerman, ED
Zukanovich, RF
Abstract: The KTeV E799 experiment has conducted a search for the rare decays, K-L -> pi(0)pi(0)mu(+)mu(-) and K-L -> pi(0)pi X-0(0) -> pi(0)pi(0)mu(+)mu(-), where the X-0 is a possible new neutral boson that was reported by the HyperCP experiment with a mass of (214: 3 +/- 0: 5) MeV/c(2). We find no evidence for either decay. We obtain upper limits of Br(K-L -> pi(0)pi(0)mu(+)mu(-) -> pi(0)pi X-0(0) -> pi(0)pi(0)mu(+)mu(-) ) < 1.0 x 10(-10) and Br(K-L -> pi(0)pi(0)mu(+)mu(-)) < 9.2 x 10(-11) at the 90% confidence level. This result rules out the pseudoscalar X-0 as an explanation of the HyperCP K-L result under the scenario that the (d) over bar sX(0) coupling is completely real.
Country: EUA
Editor: Amer Physical Soc
Citation: Physical Review Letters. Amer Physical Soc, v. 107, n. 20, 2011.
Rights: aberto
Identifier DOI: 10.1103/PhysRevLett.107.201803
Date Issue: 2011
Appears in Collections:Unicamp - Artigos e Outros Documentos

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