Search for spontaneous R-parity violation at s**(1/2) = 183-GeV and 189-GeV

Searches for spontaneous R -parity-violating signals at s =183 GeV and s =189 GeV have been performed using the 1997 and 1998 DELPHI data, under the assumption of R -parity breaking in the third lepton family. The expected topology for the decay of a pair of charginos into two acoplanar taus plus missing energy was investigated and no evidence for a signal was found. The results were used to derive a limit on the chargino mass and to constrain the allowed domains of the MSSM parameter space.

Note:

18 pages, 6 figures, Accepted by Physics Letters B Report-no: CERN-EP/2000-124

electron positron: colliding beams
electron positron: annihilation
supersymmetry
R parity: spontaneously broken
sparticle: search for
chargino: pair production
chargino: decay
Majoron: production
channel cross section: upper limit
chargino: mass

References(37)

Figures(0)

[1]

Supersymmetry, Supergravity and Particle Physics

Hans Peter Nilles
(
- Geneva U. and
- CERN
)

- Phys.Rept. 110 (1984) 1-162
•
DOI:
- 10.1016/0370-1573(84)90008-5

[1]

The Search for Supersymmetry: Probing Physics Beyond the Standard Model

Howard E. Haber
(
- UC, Santa Cruz and
- SLAC
)
,
Gordon L. Kane
(
- Michigan U.
)

- Phys.Rept. 117 (1985) 75-263
•
DOI:
- 10.1016/0370-1573(85)90051-1

[2]

Neutrino as the Supersymmetric Partner of the Majoron

- Phys.Lett.B 119 (1982) 136-140
•
DOI:
- 10.1016/0370-2693(82)90262-3

[2]

Spontaneous R-Parity Violation in Supersymmetry: A Model for Solar Neutrino Oscillations

A. Santamaria
(
- Valencia U.
)
,
J.W.F. Valle
(
- Valencia U.
)

- Phys.Lett.B 195 (1987) 423-428
•
DOI:
- 10.1016/0370-2693(87)90042-6

[2]

Supersymmetric Majoron Signatures and Solar Neutrino Oscillations

A. Santamaria
(
- Valencia U. and
- LBL, Berkeley
)
,
J.W.F. Valle
(
- Valencia U. and
- LBL, Berkeley
)

- Phys.Rev.Lett. 60 (1988) 397-400
•
DOI:
- 10.1103/PhysRevLett.60.397

[2]

Solar Neutrino Oscillation Parameters and the Broken R Parity Majoron

A. Santamaria
(
- Carnegie Mellon U. and
- Valencia U.
)
,
J.W.F. Valle
(
- Valencia U.
)

- Phys.Rev.D 39 (1989) 1780-1783
•
DOI:
- 10.1103/PhysRevD.39.1780

[3]

Neutrino Mass and New Light Gauge Boson in Superstring Models

J.W.F. Valle
(
- Valencia U.
)

- Phys.Lett.B 196 (1987) 157-162
•
DOI:
- 10.1016/0370-2693(87)90596-X

[3]

Supersymmetry with spontaneous R-parity breaking in $Z^0$ decays: The Case of an additional $Z$

M.C. Gonzalez-Garcia
(
- CERN and
- Valencia U.
)
,
J.W.F. Valle
(
- CERN and
- Valencia U.
)

- Nucl.Phys.B 355 (1991) 330-350
•
DOI:
- 10.1016/0550-3213(91)90117-G

[4]

A Model for Spontaneous R Parity Breaking

A. Masiero
(
- INFN, Padua
)
,
J.W.F. Valle
(
- Valencia U.
)

- Phys.Lett.B 251 (1990) 273-278
•
DOI:
- 10.1016/0370-2693(90)90935-Y

[4]

How to spontaneously break R-parity

- Phys.Lett.B 288 (1992) 311-320
•
DOI:
- 10.1016/0370-2693(92)91109-M

[5]

R-parity violating signals for chargino production at LEP-2

F. de Campos
(
- Sao Paulo U., Guaratingueta
)
,
Oscar J.P. Eboli
(
- Sao Paulo U.
)
,
M.A. Garcia-Jareno
(
- Valencia U.
)
,
J.W.F. Valle
(
- Valencia U.
)

- Nucl.Phys.B 546 (1999) 33-51
•
e-Print:
- hep-ph/9710545
•
DOI:
- 10.1016/S0550-3213(99)00032-2

[6]

Supersymmetry phenomenology with spontaneous R-parity breaking in $Z^0$ decays

- Phys.Lett.B 251 (1990) 142-149
•
DOI:
- 10.1016/0370-2693(90)90244-Z

[6]

Rare $\Z^0$ Decays From R Parity Violation

Riccardo Barbieri
(
- Pisa U. and
- INFN, Pisa
)
,
David E. Brahm
(
- UC, Berkeley and
- LBL, Berkeley
)
,
Lawrence J. Hall
(
- UC, Berkeley and
- LBL, Berkeley
)
,
Stephen D.H. Hsu
(
- UC, Berkeley and
- LBL, Berkeley
)

- Phys.Lett.B 238 (1990) 86-91
•
DOI:
- 10.1016/0370-2693(90)92104-Q

[7]

Single photon decays of the Z0 and SUSY with spontaneously broken R-parity

- Phys.Lett.B 351 (1995) 497-503
•
e-Print:
- hep-ph/9502211
•
DOI:
- 10.1016/0370-2693(95)00432-K

[7]

Supersymmetric signals in muon and $\tau$ decays

- Nucl.Phys.B 363 (1991) 369-384
•
DOI:
- 10.1016/0550-3213(91)80025-H

[8]

Neutrino Mass and Baryon Number Nonconservation in Superstring Models

R.N. Mohapatra
(
- Maryland U.
)
,
J.W.F. Valle
(
- Barcelona, Autonoma U.
)

- Phys.Rev.D 34 (1986) 1642,
•
DOI:
- 10.1103/PhysRevD.34.1642

[8]

Nucl. Phys. B11(Proc. Suppl.) (1989) 118

J.W.F. Valle

[9]

Gauge Models with Spontaneously Broken Local Supersymmetry

Riccardo Barbieri
(
- Pisa, Scuola Normale Superiore and
- INFN, Pisa
)
,
S. Ferrara
(
- CERN
)
,
Carlos A. Savoy
(
- Geneva U.
)

- Phys.Lett.B 119 (1982) 343,
- Phys. Lett. B119 (1982) 343-347 and CERN Geneva - TH. 3365 (82,REC.AUG.) 10p,
- IN *FERRARA, S. (ED.): SUPERSYMMETRY, VOL. 2*, 1038-1042. (PHYS. LETT. B119 (1982) 343-347) AND CERN GENEVA - TH. 3365 (82,REC.AUG.) 10 P. (SEE BOOK INDEX)
•
DOI:
- 10.1016/0370-2693(82)90685-2