How to search for an electric dipole form factor of the. tau. lepton at a. tau. -charm factory

Conference · Wed Aug 09 04:00:00 EDT 1989

OSTI ID:5522610

Bernreuther, W ^[1]; Nachtmann, O ^[2]

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1. Lawrence Berkeley Lab., CA (USA)
2. Heidelberg Univ. (Germany, F.R.) Stanford Linear Accelerator Center, Menlo Park, CA (USA)

We investigate some CP-odd correlations which can be used to search for an electric dipole form factor d{sub {tau}}(s) of the {tau} in the reaction e{sup +}e{sup {minus}} {yields} {tau}{sup +}{tau} {sup {minus}} at c.m. energies {radical}s relevant for a {tau}-charm factory. These observables require measurement of the {tau} polarizations. Using the channel e{sup +}e{sup {minus}} {yields} {pi}{sup +} {nu}{sub {tau}}{pi}{sup {minus}}{nu}{sub {tau}} one should be able to measure d{sub {tau}} at {radical}s = 4 GeV with an accuracy {delta}(d{sub {tau}}) {approx equal} 2.5 {times} 10{sup {minus}16}e cm, assuming the production of 10{sup 7} {tau} pairs. The same accuracy can be reached with 10{sup 6} {tau} pairs at {radical}s = 10 GeV, the typical c.m. energy of a B-factory. 8 refs., 2 figs., 1 tab.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• Sponsoring Organization: DOE; USDOE, Washington, DC (USA)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5522610
• Report Number(s): LBL-27467; CONF-8905144--19; ON: DE91014714
• Country of Publication: United States
• Language: English

Related Subjects

645203* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
CP INVARIANCE
DIPOLES
ELECTRIC DIPOLES
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
FERMIONS
FORM FACTORS
HEAVY LEPTONS
INTERACTIONS
INVARIANCE PRINCIPLES
LEPTON-LEPTON INTERACTIONS
LEPTONS
MULTIPOLES
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
POSTULATED PARTICLES
SCATTERING AMPLITUDES
TAU PARTICLES