Signals for supersymmetry at HERA

. We can probe very small Yukawa couplings \lam' \gsim 3\cdot 10~{-6}, limited only by the decay length of the LSP. We assume the LSP to be the lightest neutralino and study its decays in detail. We present the matrix element squared for the tree-level decay amplitude of a generally mixed neutralino explicitly. We find that the branching fraction to charged leptons strongly depends on the SUSY parameters and can differ significantly from the naively expected

50\%

. The SUSY mass reaches of the studied processes in the ZEUS detector at HERA were found to be: (m({\tilde e}, {\tilde \nu})+m({\tilde q}))\leq 170\gev, 195\gev and 205\gev for the

L_\tau Q{\bar D}, L_\mu Q{\bar D}

and

L_e Q{\bar D}

couplings respectively. These are well above existing limits on R-parity violating (\rpv) SUSY from previous experiments. We conclude that HERA offers a {\it very promising} discovery potential for \rpv\ SUSY.

electron p: inclusive reaction
supersymmetry
sparticle: search for
sparticle: pair production
pair production: sparticle
neutral current
charged current
baryon: parity
parity: baryon
lepton number: violation

References(32)

Figures(0)

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

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

Explicit R-Parity Breaking in Supersymmetric Models

Lawrence J. Hall
(
- LBL, Berkeley and
- UC, Berkeley
)
,
Mahiko Suzuki
(
- LBL, Berkeley and
- UC, Berkeley
)

- Nucl.Phys.B 231 (1984) 419-444
•
DOI:
- 10.1016/0550-3213(84)90513-3

Supersymmetry at Ordinary Energies. 1. Masses and Conservation Laws

Steven Weinberg
(
- Harvard U. and
- Texas U.
)

- Phys.Rev.D 26 (1982) 287,
- IN *FERRARA, S. (ED.): SUPERSYMMETRY, VOL. 1*, 699-714. (PHYS. REV. D26 (1982) 287-302) AND HARVARD UNIV. CAMBRIDGE - HUTP-81-A047 (81,REC.MAR.82) 42 P. (SEE BOOK INDEX)
•
DOI:
- 10.1103/PhysRevD.26.287

- Nucl.Phys.B 197 83

Proton Decay in Supersymmetric Models

Savas Dimopoulos
(
- Michigan U. and
- Stanford U., Phys. Dept.
)
,
Stuart Raby
(
- Los Alamos
)
,
Frank Wilczek
(
- Santa Barbara, KITP
)

- Phys.Lett.B 112 (1982) 133,
- IN *FERRARA, S. (ED.): SUPERSYMMETRY, VOL. 1*, 744-747, (PHYS. LETT. B112 (1982) 133-136) AND CALIF. UNIV. SANTA BARBARA - NSF-ITP-82-008 (82,REC.MAR.) 17 P. (SEE BOOK INDEX)
•
DOI:
- 10.1016/0370-2693(82)90313-6

Discrete gauge symmetry anomalies

Luis E. Ibanez
(
- CERN
)
,
Graham G. Ross
(
- Oxford U.
)

- Phys.Lett.B 260 (1991) 291-295
•
DOI:
- 10.1016/0370-2693(91)91614-2

Discrete gauge symmetries and the origin of baryon and lepton number conservation in supersymmetric versions of the standard model

Luis E. Ibanez
(
- CERN
)
,
Graham G. Ross
(
- Oxford U.
)

- Nucl.Phys.B 368 (1992) 3-37
•
DOI:
- 10.1016/0550-3213(92)90195-H

Sphaleron erasure of primordial baryogenesis

Herbert K. Dreiner
(
- Oxford U.
)
,
Graham G. Ross
(
- Oxford U.
)

- Nucl.Phys.B 410 (1993) 188-216
•
e-Print:
- hep-ph/9207221
•
DOI:
- 10.1016/0550-3213(93)90579-E

Cross-Sections for Lepton and Baryon Number Violating Processes from Supersymmetry at p anti-p Colliders

Savas Dimopoulos
(
- Stanford U., Phys. Dept.
)
,
Rahim Esmailzadeh
(
- SLAC
)
,
Lawrence J. Hall
(
- UC, Berkeley
)
,
G.D. Starkman
(
- Princeton, Inst. Advanced Study
)

- Phys.Rev.D 41 (1990) 2099
•
DOI:
- 10.1103/PhysRevD.41.2099

R-parity violation at hadron colliders

Herbert K. Dreiner
(
- Oxford U.
)
,
Graham G. Ross
(
- Oxford U.
)

- Nucl.Phys.B 365 (1991) 597-613,
- Nucl. Phys. B365 (1991) 597-613 and Oxford Univ. - OUTP-91-15P (91,rec.Jun.) 21 p
•
DOI:
- 10.1016/0550-3213(91)90443-2

Squark and gluino mass limits in R-parity violating SUSY model from the Tevatron dilepton data

D.P. Roy
(
- CERN
)

- Phys.Lett.B 283 (1992) 270-277
•
DOI:
- 10.1016/0370-2693(92)90018-Y

Like sign dilepton signature for gluino production at CERN LHC with or without R conservation

- Phys.Rev.D 49 (1994) 3270-3282
•
e-Print:
- hep-ph/9310291
•
DOI:
- 10.1103/PhysRevD.49.3270

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

Tau signals of R-parity breaking at LEP-200

- Nucl.Phys.B 401 (1993) 67-92
•
e-Print:
- hep-ph/9209251
•
DOI:
- 10.1016/0550-3213(93)90298-4

R-parity violation at HERA

J. Butterworth
(
- Oxford U.
)
,
Herbert K. Dreiner
(
- Oxford U.
)

- Nucl.Phys.B 397 (1993) 3-34
•
e-Print:
- hep-ph/9211204
•
DOI:
- 10.1016/0550-3213(93)90334-L

Gaugino - Higgsino Mixing and Slepton - Squark Production in $e p$ Collisions

H. Komatsu
(
- Dortmund U.
)
,
R. Ruckl
(
- DESY
)

- Nucl.Phys.B 299 (1988) 407-430
•
DOI:
- 10.1016/0550-3213(88)90543-3

Signatures for Sneutrino and Squark Production in $e p$ Collisions

- Z.Phys.C 41 (1988) 475
•
DOI:
- 10.1007/BF01585633

Some New Aspects of Supersymmetry R-Parity Violating Interactions

Vernon D. Barger
(
- Wisconsin U., Madison
)
,
G.F. Giudice
(
- Fermilab
)
,
Tao Han
(
- Wisconsin U., Madison
)

- Phys.Rev.D 40 (1989) 2987
•
DOI:
- 10.1103/PhysRevD.40.2987

Constraints on Supersymmetric Particles From the {LEP} Data on Z $^0$ Decay Properties

- Phys.Rev.D 41 (1990) 3414
•
DOI:
- 10.1103/PhysRevD.41.3414

Weak Symmetry Breaking by Radiative Corrections in Broken Supergravity

- Phys.Lett.B 125 (1983) 275,
- IN *FERRARA, S. (ED.): SUPERSYMMETRY, VOL. 2*, 1138-1144. (PHYS. LETT. B125 (1983) 275-281) AND SLAC STANFORD - SLAC-PUB-3042 (83,REC.MAR.) 20 P. (SEE BOOK INDEX)
•
DOI:
- 10.1016/0370-2693(83)91283-2

N=1 Supergravity, the Breaking of SU(2) x U(1) and the Top Quark Mass

Luis E. Ibanez
(
- Madrid, Autonoma U.
)
,
C. Lopez
(
- Madrid, Autonoma U.
)

- Phys.Lett.B 126 (1983) 54-58
•
DOI:
- 10.1016/0370-2693(83)90015-1

Chargino production at LEP-200

- Z.Phys.C 55 (1992) 257-264
•
DOI:
- 10.1007/BF01482587

Selectron and Squark Production in $e p$ Collisions at {HERA}

Jochen Bartels
(
- Hamburg U.
)
,
W. Hollik
(
- Hamburg U.
)

- Z.Phys.C 39 (1988) 433

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