First observation of tau->3 pi eta nu(tau) and tau->f(1)pi nu(tau) decays

被引：32

作者：

Bergfeld, T

Eisenstein, BI

Ernst, J

Gladding, GE

Gollin, GD

Hans, RM

Johnson, E

Karliner, I

Marsh, MA

Palmer, M

Selen, M

Thaler, JJ

Edwards, KW

Bellerive, A

Janicek, R

MacFarlane, DB

Patel, PM

Sadoff, AJ

Ammar, R

Baringer, P

Bean, A

Besson, D

Coppage, D

Darling, C

Davis, R

Hancock, N

Kotov, S

Kravchenko, I

Kwak, N

Anderson, S

Kubota, Y

Lee, SJ

ONeill, JJ

Patton, S

Poling, R

Riehle, T

Savinov, V

Smith, A

Alam, MS

Athar, SB

Ling, Z

Mahmood, AH

Severini, H

Timm, S

Wappler, F

Anastassov, A

Blinov, S

Duboscq, JE

Fujino, D

Gan, KK

机构：

[1] CARLETON UNIV,OTTAWA,ON K1S 5B6,CANADA

[2] INST PARTICLE PHYS,MONTREAL,PQ,CANADA

[3] MCGILL UNIV,MONTREAL,PQ H3A 2T8,CANADA

[4] ITHACA COLL,ITHACA,NY 14850

[5] UNIV KANSAS,LAWRENCE,KS 66045

[6] UNIV MINNESOTA,MINNEAPOLIS,MN 55455

[7] SUNY ALBANY,ALBANY,NY 12222

[8] OHIO STATE UNIV,COLUMBUS,OH 43210

[9] UNIV OKLAHOMA,NORMAN,OK 73019

[10] PURDUE UNIV,W LAFAYETTE,IN 47907

[11] UNIV ROCHESTER,ROCHESTER,NY 14627

[12] STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309

[13] SO METHODIST UNIV,DALLAS,TX 75275

[14] SYRACUSE UNIV,SYRACUSE,NY 13244

[15] VANDERBILT UNIV,NASHVILLE,TN 37235

[16] VIRGINIA POLYTECH INST & STATE UNIV,BLACKSBURG,VA 24061

[17] WAYNE STATE UNIV,DETROIT,MI 48202

[18] CALTECH,PASADENA,CA 91125

[19] UNIV CALIF SAN DIEGO,LA JOLLA,CA 92093

[20] UNIV CALIF SANTA BARBARA,SANTA BARBARA,CA 93106

[21] UNIV COLORADO,BOULDER,CO 80309

[22] CORNELL UNIV,ITHACA,NY 14853

[23] UNIV FLORIDA,GAINESVILLE,FL 32611

[24] HARVARD UNIV,CAMBRIDGE,MA 02138

[25] UNIV HAWAII MANOA,HONOLULU,HI 96822

[26] BINP,RU-630090 NOVOSIBIRSK,RUSSIA

[27] LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551

[28] UNIV TEXAS,AUSTIN,TX 78712

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 79卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.79.2406

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have observed new channels for tau decays with an eta in the final state. We study 3-prong tau decays, using the eta --> gamma gamma and eta --> 3 pi(0) decay modes and 1-prong decays with two pi(0)'s using the eta --> gamma channel. The measured branching fractions B(tau(-)-->pi(-)pi(-)pi(+)eta nu(tau)) = (3.4-(0.6)(0.5) +/- 0.6) x 10(-4) and B(tau(-) --> pi(-)2 pi(0) eta nu<(tau>)) = (1.4 +/- 0.6 +/- 0.3) x 10(-4). We observe clear evidence for f(1) --> eta pi pi substructure and measure B(pi(-) --> F-1 pi(-)nu(tau)) = (5.8(-1.3)(+1.4) +/- 1.8) x 10(-4). We have also searched for eta'(958) production and obtain 90% C.L. upper limits B(tau(-) --> pi(-)eta'nu(tau)) < 7.4 x 10(-5) 10-5 and B(tau(-) --> pi(-) --> pi(-)pi(0) eta'nu(tau)) < 8.0 x 10(-5).

引用

页码：2406 / 2410

页数：5

共 21 条

[1] QUARK SUSCEPTIBILITY IN HOT QCD [J].

PRAKASH, M ;

ZAHED, I .

PHYSICAL REVIEW LETTERS, 1992, 69 (23) :3282-3285

[2] Particles and field .1. Review of particle physics [J].

Barnett, RM ;

Carone, CD ;

Groom, DE ;

Trippe, TG ;

Wohl, CG ;

Armstrong, B ;

Gee, PS ;

Wagman, GS ;

James, F ;

Mangano, M ;

Monig, K ;

Montanet, L ;

Feng, JL ;

Murayama, H ;

Hernandez, JJ ;

Manohar, A ;

AguilarBenitez, M ;

Caso, C ;

Crawford, RL ;

Roos, M ;

Tornqvist, NA ;

Hayes, KG ;

Hagiwara, K ;

Nakamura, K ;

Tanabashi, M ;

Olive, K ;

Honscheid, K ;

Burchat, PR ;

Shrock, RE ;

Eidelman, S ;

Schindler, RH ;

Gurtu, A ;

Hikasa, K ;

Conforto, G ;

Workman, RL ;

Grab, C ;

Amsler, C .

PHYSICAL REVIEW D, 1996, 54 (01) :1-+

[3] Two-loop QCD corrections to b->c transitions at zero recoil [J].

Czarnecki, A .

PHYSICAL REVIEW LETTERS, 1996, 76 (22) :4124-4127

[4]

BRUN R, DDEE841 CERN

[5] Intermittency regions at high energies [J].

Golyak, I ;

Andre, T .

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS, 1997, 74 (02) :275-278

[6] COMPARATIVE-ANALYSIS OF TAU-LEPTON DECAY AND ELECTRON-POSITRON ANNIHILATION [J].

DONNACHIE, A ;

CLEGG, AB .

PHYSICAL REVIEW D, 1995, 51 (09) :4979-4991

[7]

GAN KK, OHSTPYHEPE97009

[8] MONTE-CARLO SIMULATION OF THE PROCESS E+E-]TAU+TAU-,TAU+/--]X+/- INCLUDING RADIATIVE OMICRON(ALPHA-3) QED CORRECTIONS, MASS AND SPIN EFFECTS [J].

JADACH, S ;

WAS, Z .

COMPUTER PHYSICS COMMUNICATIONS, 1985, 36 (02) :191-211

[9] THE TAU-DECAY LIBRARY TAUOLA, VERSION 2.4 [J].

JADACH, S ;

WAS, Z ;

DECKER, R ;

KUHN, JH .

COMPUTER PHYSICS COMMUNICATIONS, 1993, 76 (03) :361-380

[10] KORALB VERSION 2.1 - AN UPGRADE WITH THE TAUOLA LIBRARY OF TAU-DECAYS [J].

JADACH, S ;

WAS, Z .

COMPUTER PHYSICS COMMUNICATIONS, 1991, 64 (02) :267-274

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