Limits on the masses of supersymmetric particles at s**(1/2) = 189-GeV - INSPIRE

DataBETA

Limits on the masses of supersymmetric particles at s**(1/2) = 189-GeV

DELPHI

Collaboration

Jun, 2000

22 pages

Published in:

Phys.Lett.B 489 (2000) 38-54

e-Print:

hep-ex/0103014 [hep-ex]

DOI:

10.1016/S0370-2693(00)00888-1

PDG:

{{\widetilde{\mathit \chi}}_{{{2}}}^{0}}

{{\widetilde{\mathit \chi}}_{{{3}}}^{0}}

{{\widetilde{\mathit \chi}}_{{{4}}}^{0}}

(Neutralinos) mass limits

Report number:

CERN-EP-2000-088

Experiments:

CERN-LEP-DELPHI

View in:

reference search20 citations

Citations per year

Abstract: (Elsevier)

Searches for charginos, neutralinos and sleptons at LEP2 centre-of-mass energies from 130 GeV to 189 GeV have been used to set lower limits on the mass of the Lightest Supersymmetric Particle and other supersymmetric particles within the MSSM framework. R-parity conservation has been assumed. The lightest neutralino was found to be heavier than 32.3 GeV/ c 2 independent of the m 0 value. The lightest chargino, the second-to-lightest neutralino, the next-to-heaviest neutralino, the heaviest neutralino, the sneutrino and the right-handed selectron were found to be heavier than 62.4 GeV/ c 2 , 62.4 GeV/ c 2 , 99.9 GeV/ c 2 , 116.0 GeV/ c 2 , 61.0 GeV/ c 2 , and 87.0 GeV/ c 2 , respectively. These limits do not depend on m 0 or M 2 and are valid for 1≤ tan β ≤40, in the μ region where the lightest neutralino is the LSP. If the sneutrino is heavier than the chargino the lightest neutralino has to be heavier than 32.4 GeV/ c 2 . The effects of mixings in the third family of sfermions on these limits are discussed. The confidence level of all limits given is 95%.

Note:

22 pages, 7 figures Report-no: CERN-EP/2000-088 Journal-ref: Phys. Lett. B 489 (2000) 38-54

electron positron: colliding beams
electron positron: annihilation
sparticle: search for
chargino
neutralino
slepton
sparticle: decay modes
sparticle: mass
lower limit
R parity: invariance

References(28)

Figures(0)

[1]

Supersymmetry

- Phys.Rept. 32 (1977) 249-334
•
DOI:
- 10.1016/0370-1573(77)90066-7

[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]

Searches for Sleptons at √ s = 183 to 189 GeV

DELPHI Coll

Collaboration

[3]

Search for neutralinos, scalar leptons and scalar quarks in e+ e- interactions at s**(1/2) = 130-GeV and 136-GeV.

DELPHI

Collaboration

•

P. Abreu

et al.

- Phys.Lett.B 387 (1996) 651-666
•
DOI:
- 10.1016/0370-2693(96)01197-5

[4]

Eur. Phys. J. C (1), 1-20 (1998)

DELPHI Coll

Collaboration

•

P. Abreu

for the collaboration.

[5]

Search for charginos, neutralinos and gravitinos in e $^+$ e $^-$ interactions at $\sqrt s$ = 183 GeV

DELPHI

Collaboration

•

P. Abreu

et al.

- Phys.Lett.B 446 (1999) 75-91,
- Phys.Lett.B 451 (1999) 447-449 (erratum)
•
DOI:
- 10.1016/S0370-2693(98)01526-3

[6]

Search for neutralinos at 189 GeV

DELPHI Coll

Collaboration

•

Lett. B

for the collaboration.

[7]

Search for pair produced neutralinos in events with photons and missing energy from $e^{+} e^{-}$ collisions at $S^{(1/2)}$ = 130-GeV to 183-GeV

DELPHI

Collaboration

•

P. Abreu

et al.

- Eur.Phys.J.C 6 (1999) 371-384
•
DOI:
- 10.1007/s100529801044

[8]

Search for the lightest chargino at s**(1/2) = 130-GeV and 136-GeV in DELPHI

DELPHI

Collaboration

•

P. Abreu

et al.

- Phys.Lett.B 382 (1996) 323-336
•
DOI:
- 10.1016/0370-2693(96)00769-1

[9]

Hadronization properties of b quarks compared to light quarks in e $^+$ e $^-$ $\to \overline {qq}$ from 183-GeV to 200-GeV

DELPHI

Collaboration

•

P. Abreu
(
- CERN
)

et al.

- Phys.Lett.B 479 (2000) 118-128,
- Phys.Lett.B 492 (2000) 398-398 (erratum)
•
e-Print:
- hep-ex/0103022
•
DOI:
- 10.1016/S0370-2693(00)00312-9

[10]

Update of the search for charginos nearly massdegenerate with the lightest neutralino

DELPHI Coll

Collaboration

•

Lett. B

for the collaboration.

[11]

Search for anomalous production of single photons at $\sqrt{s}$ = 130-GeV and 136-GeV

DELPHI

Collaboration

•

W. Adam

et al.

- Phys.Lett.B 380 (1996) 471-479
•
DOI:
- 10.1016/0370-2693(96)00671-5

[12]

Signatures of Chargino Production in e+ e- Collisions

- Z.Phys.C 30 (1986) 441
•
DOI:
- 10.1007/BF01557609

[12]

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

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

[12]

Chargino production at LEP-200

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

[13]

Neutralino production as SUSY discovery process at LEP-2

S. Ambrosanio
(
- Rome U. and
- INFN, Rome
)
,
B. Mele
(
- Rome U. and
- INFN, Rome
)

- Phys.Rev.D 52 (1995) 3900-3918
•
e-Print:
- hep-ph/9503362
•
DOI:
- 10.1103/PhysRevD.52.3900

[13]

S. Ambrosanio
,
B. Mele

- Phys.Rev.D 53 (1996) 2451

[14]

Searches for Neutral Higgs Bosons in e+ e- Collisions around (s) ≤ 189 GeV

DELPHI Collaboration

Collaboration

[15]

A search for invisible Higgs bosons produced in e+ e- interactions up to √ s = 189 GeV

DELPHI Collaboration

Collaboration

•

Lett. B

for the collaboration.

[16]

in Physics at LEP2, CERN 96-01, Vol. 2, p. 328. S. Katsanevas and P. Morawitz

S. Katsanevas
,
S. Melachroinos

- Comput.Phys.Commun. 122 (1998) 227

[17]

erratum

V.F. Obraztsov

- Nucl.Instrum.Meth. 316 (1992) 388

[18]

LEPSUSYWG, ALEPH, DELPHI, L3 and OPAL experiments, note LEPSUSYWG/99-03.1

[19]

Search for charginos and neutralinos in e+ e- collisions at s**(1/2) = 188.6-GeV and mass limit for the lightest neutralino

ALEPH

Collaboration

•

G. Ganis
(
- CERN
)

for the collaboration.

[20]

Search for charginos and neutralinos in $e^{+} e^{-}$ collisions at $\sqrt{S}$ = 189-GeV

L3

Collaboration

•

M. Acciarri

et al.

- Phys.Lett.B 472 (2000) 420-433
•
e-Print:
- hep-ex/9910007
•
DOI:
- 10.1016/S0370-2693(99)01388-X

1-25 of 28
1
2
25 / page