BABAR Collaboration (Including: UNSPECIFIED). (2005) Search for the decay tau(-->)4 pi(-)3 pi(+)(pi(0))nu(tau). PHYSICAL REVIEW D, 72 (1). -. doi:10.1103/PhysRevD.72.012003 ISSN 1550-7998.

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Abstract

A search for the decay of the tau lepton to seven charged pions and one or zero pi(0) mesons was performed using the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) collider. The analysis uses 232.2 fb(-1) of data at center-of-mass energies on or near the Upsilon(4S) resonance. We observe 24 events with an expected background of 21.6 +/- 1.3 events. Without evidence for a signal, we calculate an upper limit of B(tau(-)-> 4 pi(-)3 pi(+)(pi(0))nu(tau))< 3.0 x 10(-7) at 90% confidence level. This is an improvement by nearly an order of magnitude over the previously established limit. In addition, we set upper limits for the exclusive decays tau(-)-> 4 pi(-)3 pi(+)nu(tau) and tau(-)-> 4 pi(-)3 pi(+)pi(0)nu(tau).

Item Type:	Journal Article
Subjects:	Q Science > QB Astronomy Q Science > QC Physics
Journal or Publication Title:	PHYSICAL REVIEW D
Publisher:	AMERICAN PHYSICAL SOC
ISSN:	1550-7998
Official Date:	July 2005
Dates:	Date Event July 2005 UNSPECIFIED
Volume:	72
Number:	1
Number of Pages:	8
Page Range:	-
DOI:	10.1103/PhysRevD.72.012003
Publication Status:	Published

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