First Search for {ital CP} Violation in Tau Lepton Decay

Journal Article · Sun Nov 01 00:00:00 EST 1998 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.81.3823· OSTI ID:298629

Anderson, S; Kubota, Y; Lee, S J; ONeill, J J; Poling, R; Riehle, T; Smith, A ^[1]; Alam, M S; Athar, S B; Ling, Z; Mahmood, A H; Timm, S; Wappler, F ^[2]; Anastassov, A; Duboscq, J E; Fujino, D; Gan, K K; Hart, T; Honscheid, K; Kagan, H ; Kass, R; Lee, J; Schwarthoff, H; Spencer, M B; Sung, M; Undrus, A; Wolf, A; Zoeller, M M ^[3]; Richichi, S J; Severini, H; Skubic, P ^[4]; Bishai, M; Fast, J; Hinson, J W; Menson, N; Miller, D H; Shibata, E I; Shipsey, I P; Yurko, M ^[5]; Glenn, S; Kwon, Y; Lyon, A L; Roberts, S; Thorndike, E H ^[6]; Jessop, C P; Lingel, K; Marsiske, H; Perl, M L; Savinov, V; Ugolini, D; Zhou, X ^[7]; Coan, T E; Fadeyev, V; Korolkov, I; Maravin, Y; Narsky, I; Shelkov, V; Staeck, J; Stroynowski, R; Volobouev, I; Ye, J ^[8]; Artuso, M; Azfar, F; Efimov, A; Goldberg, M; He, D; Kopp, S; Moneti, G C; Mountain, R; Schuh, S; Skwarnicki, T; Stone, S; Viehhauser, G; Wang, J C; Xing, X ^[9]; Bartelt, J; Csorna, S E; Jain, V; McLean, K W; Marka, S ^[10]; Godang, R; Kinoshita, K; Lai, I C; Pomianowski, P; Schrenk, S ^[11]; Bonvicini, G; Cinabro, D; Greene, R; Perera, L P; Zhou, G J ^[12]

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1. University of Minnesota, Minneapolis, Minnesota 55455 (United States)
2. State University of New York at Albany, Albany, New York 12222 (United States)
3. The Ohio State University, Columbus, Ohio 43210 (United States)
4. University of Oklahoma, Norman, Oklahoma 73019 (United States)
5. Purdue University, West Lafayette, Indiana 47907 (United States)
6. University of Rochester, Rochester, New York 14627 (United States)
7. Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309 (United States)
8. Southern Methodist University, Dallas, Texas 75275 (United States)
9. Syracuse University, Syracuse, New York 13244 (United States)
10. Vanderbilt University, Nashville, Tennessee 37235 (United States)
11. Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061 (United States)
12. Wayne State Univ., (United States)

We have performed the first search for CP violation in tau lepton decay. CP violation in lepton decay does not occur in the minimal standard model but can occur in extensions such as the multi-Higgs doublet model. It appears as a characteristic difference between the {tau}{sup {minus}} and {tau}{sup +} decay angular distributions for the semileptonic decay modes such as {tau}{sup {minus}}{r_arrow}K{sup 0}{pi}{sup {minus}}{nu} . We define an observable asymmetry to exploit this and find no evidence for any CP violation. {copyright} {ital 1998} {ital The American Physical Society }

• OSTI ID: 298629
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 18 Vol. 81; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CP INVARIANCE
HIGGS BOSONS
KAONS
KAONS NEUTRAL
NEUTRINOS
PARTICLE DECAY
PIONS
PIONS MINUS
PIONS NEUTRAL
PIONS PLUS
SEMILEPTONIC DECAY
STANDARD MODEL
TAU NEUTRINOS
TAU PARTICLES