Study of the Decay {ital {tau}}{sup {minus}}{r_arrow}2{ital {pi} }{sup {minus}}{ital {pi}}{sup +} 3{ital {pi}}{sup 0}{ital {nu}}{sub {ital {tau} }}

Journal Article · Sat Nov 01 00:00:00 EST 1997 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.79.3814· OSTI ID:628716

Anderson, S; Kubota, Y; Lee, S; ONeill, J J; Patton, S; Poling, R; Riehle, T; Savinov, V; Smith, A ^[1]; Alam, M S; Athar, S B; Ling, Z; Mahmood, A H; Severini, H; Timm, S; Wappler, F ^[2]; Anastassov, A; Duboscq, J E; Fujino, D; Gan, K K ; Hart, T; Homoelle, D; Honscheid, K; Kagan, H; Kass, R; Lee, J; Spencer, M B; Sung, M; Undrus, A; Wanke, R; Wolf, A; Zoeller, M M ^[3]; Nemati, B; Richichi, S J; Ross, W R; Skubic, P ^[4]; Bishai, M; Fast, J; Hinson, J W; Menon, N; Miller, D H; Shibata, E I; Shipsey, I P; Yurko, M ^[5]; Gibbons, L; Glenn, S; Johnson, S D; Kwon, Y; Roberts, S; Thorndike, E H ^[6]; Jessop, C P; Lingel, K; Marsiske, H; Perl, M L; Ugolini, D; Wang, R; 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; Efimov, A; Goldberg, M; He, D; Kopp, S; Moneti, G C; Mountain, R; Schuh, S; Skwarnicki, T; Stone, S; Viehhauser, G; 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; others, and

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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)

The decay {tau}{sup {minus}}{r_arrow}2{pi}{sup {minus}}{pi}{sup + }3{pi}{sup 0}{nu}{sub {tau}} has been studied with the CLEOII detector at the Cornell Electron Storage Ring. The branching fraction is measured to be (2.85{plus_minus}0.56{plus_minus}0.51){times}10{sup {minus}4} . The result is in good agreement with the isospin expectation but somewhat below the conserved-vector-current prediction. We have searched for resonance substructure in the decay. Within the statistical precision, the decay is saturated by the channels {tau}{sup {minus}}{r_arrow}{pi}{sup {minus}}2{pi}{sup 0 }{omega}{nu}{sub {tau}} , 2{pi}{sup {minus}}{pi}{sup +}{eta}{nu}{sub {tau}} , and {pi}{sup {minus}}2{pi}{sup 0}{eta}{nu}{sub {tau}} . This is the first observation of this {omega} decay mode and the branching fraction is measured to be (1.89{sup +0.74}{sub {minus}0.67}{plus_minus}0.40) {times}10{sup {minus}4} . {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 628716
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 20 Vol. 79; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BRANCHING RATIO
CVC THEORY
ISOSPIN
OMEGA PARTICLES
PIONS
RESONANCE
SEMILEPTONIC DECAY
STORAGE RINGS
TAU NEUTRINOS
TAU PARTICLES