-
D Buskulic,
D Casper,
I De Bonis,
D Decamp,
P Ghez,
C Goy,
J.-P Lees,
M.-N Minard,
P Odier,
B Pietrzyk, [......],
I.J Scott,
V Sharma,
J.D Turk,
A.M Walsh,
F.V Weber,
Sau Lan Wu,
X Wu,
J.M Yamartino,
M Zheng,
G Zobernig
[show abstract]
[hide abstract]
ABSTRACT: From a sample of 152,000 τ decays collected by the ALEPH detector at LEP an upper limit of 24 MeV at 95% CL on the τ neutrino mass has been determined. The limit is obtained using a two dimensional likelihood fit of the visible energy and the invariant mass distribution of 25 τ → 5π(π0)ντ events.
Physics Letters B 03/2013; · 3.95 Impact Factor
-
D. Buskulic,
I. De Bonis,
D. Decamp,
P. Ghez,
C. Goy,
J.-P. Lees,
A. Lucotte,
M.-N. Minard,
P. Odier,
B. Pietrzyk, [......],
M. Schmitt,
I.J. Scott,
V. Sharma,
J.D. Turk,
A.M. Walsh,
Sau Lan Wu,
X. Wu,
J.M. Yamartino,
M. Zheng,
G. Zobernig
[show abstract]
[hide abstract]
ABSTRACT: Searches for supersymmetric particles produced in e+e− collisions at centre-of-mass energies of 130 and 136 GeV have been performed in a data sample of 5.7 pb−1 collected in the autumn of 1995 by the ALEPH detector at LEP. No candidate events were found, allowing limits to be set on the masses and production cross-sections of scalar leptons, scalar tops, charginos and neutralinos. The domains previously excluded at LEP1 are substantially extended. For instance, masses of gaugino-like charginos smaller than 67.8 GeV/c2 are excluded at the 95% C.L. for scalar neutrino masses larger than 200 GeV/c2.
Physics Letters B 03/2013; · 3.95 Impact Factor
-
D. Buskulic,
I. De Bonis,
D. Decamp,
P. Ghez,
C. Goy,
J.-P. Lees,
A. Lucotte,
M.-N. Minard,
J.-Y. Nief,
P. Odier, [......],
W. Orejudos,
Y.B. Pan,
Y. Saadi,
I.J. Scott,
A.M. Walsh,
Sau Lan Wu,
X. Wu,
J.M. Yamartino,
M. Zheng,
G. Zobernig
[show abstract]
[hide abstract]
ABSTRACT: A search for pair production of new heavy leptons has been performed assuming different scenarios for the mixing of the new particles with Standard Model leptons. No candidate events were found in a data sample corresponding to an integrated luminosity of 5.6 pb−1 collected by the ALEPH detector at centre-of-mass energies of 130 and 136 GeV. New limits on production cross-sections and on masses of sequential leptons were obtained which significantly extend the mass regions excluded at LEP1. For instance, charged heavy leptons with masses below 63.5 GeV/c2 are excluded at 95% C.L. for mass differences to the associated neutral lepton of more than 7 GeV/c2.
Physics Letters B 03/2013; · 3.95 Impact Factor
-
D. Buskulic,
I. De Bonis,
D. Decamp,
P. Ghez,
C. Goy,
J.-P. Lees,
A. Lucotte,
M.-N. Minard,
P. Odier,
B. Pietrzyk, [......],
Y. Saadi,
M. Schmitt,
I.J. Scott,
V. Sharma,
A.M. Walsh,
Sau Lan Wu,
X. Wu,
J.M. Yamartino,
M. Zheng,
G. Zobernig
[show abstract]
[hide abstract]
ABSTRACT: Searches for charginos and neutralinos produced in e+e− collisions at centre-of-mass energies of 130 and 136 GeV have been performed under the assumptions that R-parity is not conserved, that the dominant R-parity violating coupling involves only leptonic fields, and that the lifetime of the lightest supersymmetric particle can be neglected. In the 5.7 pb−1 data sample collected by ALEPH, no candidate events were found. As a result, chargino and neutralino masses and couplings are constrained and the domains previously excluded at LEP1 are extended.
Physics Letters B 03/2013; · 3.95 Impact Factor
-
Damir Buskulic,
I De Bonis,
D Décamp,
P Ghez,
C Goy,
J P Lees,
A Lucotte,
M N Minard,
J Y Nief,
P Odier, [......],
W Orejudos,
Y B Pan,
Y Saadi,
I J Scott,
A M Walsh,
Wu Sau Lan,
X Wu,
J M Yamartino,
M Zheng,
G Zobernig
[show abstract]
[hide abstract]
ABSTRACT: Using data obtained with the ALEPH detector at the Z resonance, a measure based on transverse momentum is shown to exhibit a correlation between the two halves of a hadronic event which cannot be explained by energy-momentum conservation, flavour conservation, the imposition of an event axis or imperfect event reconstruction. Two possible explanations based on Monte Carlo models are examined: a) ARIADNE, with the correlation forming early in the parton shower and with the transition from partons to hadrons playing only a minor part; b) JETSET, with the correlation forming at the fragmentation stage. A correlation technique based on a jet cluster analysis is used to make a comparison of the models with the data. It is concluded that both non-perturbative and perturbative effects make important contributions to the observed correlation.
Zeitschrift für Physik C 12/2012; 73(3):421.
-
D Buskulic,
D Casper,
I De Bonis,
D Decamp,
P Ghez,
C Goy,
J.-P Lees,
A Lucotte,
M.-N Minard,
P Odier, [......],
M Schmitt,
I.J Scott,
V Sharma,
J.D Turk,
A.M Walsh,
Sau Lan Wu,
X Wu,
J.M Yamartino,
M Zheng,
G Zobernig
[show abstract]
[hide abstract]
ABSTRACT: The lifetime of the Bs0 meson is measured in approximately 3 million hadronic Z decays accumulated using the ALEPH detector at LEP from 1991 to 1994. Seven different Ds− decay modes were reconstructed and combined with an opposite sign lepton as evidence of semileptonic Bs0 decays. Two hundred and eight Ds−ℓ+ candidates satisfy selection criteria designed to ensure precise proper time reconstruction and yield a measured Bs0 lifetime of τ(Bs0) = 1.59−0.15+0.17 (stat) ±0.03 (syst) ps. Using a larger, less constrained sample of events, the product branching ratio is measured to be (stat) −0.14+0.13 (syst) %.
Physics Letters B 12/2012; · 3.95 Impact Factor
-
D. Buskulic,
I. De Bonis,
D. Decamp,
P. Ghez,
C. Goy,
J.-P. Lees,
A. Lucotte,
M.-N. Minard,
P. Odier,
B. Pietrzyk, [......],
Y. Saadi,
M. Schmitt,
I.J. Scott,
V. Sharma,
A.M. Walsh,
Sau Lan Wu,
X. Wu,
J.M. Yamartino,
M. Zheng,
G. Zobernig
[show abstract]
[hide abstract]
ABSTRACT: The B0 - B̄0 average mixing parameter and b forward-backward asymmetry AFB0(b) are measured from a sample of about 4 200 000 Z → qq̄ events recorded with the ALEPH detector at LEP in the years 1990–1995. High transverse momentum electrons and muons produced in b semileptonic decays provide the tag of the quark flavour and of its charge.The average mixing parameter and the pole b asymmetry are measured to be = 0.1246 ± 0.0051stat ± 0.0052syst, AFB0(b) = 0.1008 ± 0.0043stat ± 0.0028syst. The value of sin2θweff = 0.23198 ± 0.00092 is extracted from the asymmetry measurement.
Physics Letters B 12/2012; · 3.95 Impact Factor
-
The CMS Collaboration,
S Chatrchyan,
G Hmayakyan,
V Khachatryan,
A M Sirunyan,
W Adam,
T Bauer,
T Bergauer,
H Bergauer,
M Dragicevic, [......],
G Abdullaeva,
A Avezov,
M I Fazylov,
E M Gasanov,
A Khugaev,
Y N Koblik,
M Nishonov,
K Olimov,
A Umaraliev,
B S Yuldashev
[show abstract]
[hide abstract]
ABSTRACT: The Compact Muon Solenoid (CMS) detector is described. The detector operates at the Large Hadron Collider (LHC) at CERN. It was conceived to study proton-proton (and lead-lead) collisions at a centre-of-mass energy of 14 TeV (5.5 TeV nucleon-nucleon) and at luminosities up to 1034 cm−2 s−1 (1027 cm−2 s−1). At the core of the CMS detector sits a high-magnetic-field and large-bore superconducting solenoid surrounding an all-silicon pixel and strip tracker, a lead-tungstate scintillating-crystals electromagnetic calorimeter, and a brass-scintillator sampling hadron calorimeter. The iron yoke of the flux-return is instrumented with four stations of muon detectors covering most of the 4π solid angle. Forward sampling calorimeters extend the pseudorapidity coverage to high values (|η| ≤ 5) assuring very good hermeticity. The overall dimensions of the CMS detector are a length of 21.6 m, a diameter of 14.6 m and a total weight of 12500 t.
Journal of Instrumentation 08/2008; 3(08):S08004. · 1.87 Impact Factor
-
P. Adzic,
R. Alemany-Fernandez,
C.B. Almeida,
N.M. Almeida,
G. Anagnostou,
M.G. Anfreville,
I. Anicin,
Z. Antunovic,
E. Auffray,
S. Baccaro, [......],
I. Yaselli,
A. Zabi,
N. Zamiatin,
S. Zelepoukine,
M. Zeller,
L.Y. Zhang,
Y. Zhang,
K. Zhu,
R.Y. Zhu,
The CMS Electromagnetic Calorimeter Group
[show abstract]
[hide abstract]
ABSTRACT: The amplitude of the signal collected from the PbWO4 crystals of the CMS electromagnetic calorimeter is reconstructed by a digital filtering technique. The amplitude reconstruction
has been studied with test beam data recorded from a fully equipped barrel supermodule. Issues specific to data taken in the
test beam are investigated, and the implementation of the method for CMS data taking is discussed.
European Physical Journal C 06/2006; 46:23-35. · 3.63 Impact Factor
-
The CMS Electromagnetic Calorimeter Group,
P. Adzic,
R. Alemany-Fernandez,
C. B. Almeida,
N. M. Almeida,
G. Anagnostou,
M. G. Anfreville,
I. Anicin,
Z. Antunovic,
A. Asimidis, [......],
T. Virdee,
M. Wang,
J. H. Williams,
I. Yaselli,
N. Zamiatin,
S. Zelepoukine,
M. Zeller,
L. Y. Zhang,
K. Zhu,
R. Y. Zhu
[show abstract]
[hide abstract]
ABSTRACT: Performance tests of some aspects of the CMS ECAL were carried out on modules of the "barrel" sub-system in 2002 and 2003.
A brief test with high energy electron beams was made in late 2003 to validate prototypes of the new Very Front End electronics.
The final versions of the monitoring and cooling systems, and of the high and low voltage regulation were used in these tests.
The results are consistent with the performance targets including those for noise and overall energy resolution, required
to fulfil the physics programme of CMS at the LHC.
European Physical Journal C 12/2005; 44:1-10. · 3.63 Impact Factor
-
P. Abreu,
W. Adam,
T. Adye,
P. Adzic,
I. Ajinenko,
Z. Albrecht,
T. Alderweireld,
G. D. Alekseev,
R. Alemany,
T. Allmendinger, [......],
O. Yushchenko,
A. Zalewska,
P. Zalewski,
D. Zavrtanik,
E. Zevgolatakos,
N. I. Zimin,
A. Zintchenko,
P. Zoller,
G. C. Zucchelli,
G. Zumerle
[show abstract]
[hide abstract]
ABSTRACT: The rapidity-rank structure of pp¯ pairs is used to analyze the
mechanism of baryon production in hadronic Z0 decay. The
relative occurrence of the rapidity-ordered configuration pMp¯,
where /M is a meson, and that of pp¯ adjacent pairs is compared.
The data are found to be consistent with predictions from a mechanism
producing adjacent-rank pp¯ pairs, without requiring
`string-ordered' pMp¯ configurations. An upper limit of 15% at 90%
confidence is determined for the pMp¯ contribution.
Physics Letters B 08/2000; 490:61-70. · 3.95 Impact Factor
-
P. Abreu,
W. Adam,
T. Adye,
P. Adzic,
I. Ajinenko,
Z. Albrecht,
T. Alderweireld,
G. D. Alekseev,
R. Alemany,
T. Allmendinger, [......],
O. Yushchenko,
A. Zalewska,
P. Zalewski,
D. Zavrtanik,
E. Zevgolatakos,
N. I. Zimin,
A. Zintchenko,
P. Zoller,
G. C. Zucchelli,
G. Zumerle
[show abstract]
[hide abstract]
ABSTRACT: A study of b semileptonic decays into D, Dπ+/- and
D*π+/- final states is presented. The
D0, D+ and D*+ mesons are exclusively
reconstructed in Z decay data recorded from 1992 to 1995 in the DELPHI
experiment at LEP. The overall branching fractions are measured to
be:BR(b-->D0l-ν¯lX)=(7.04+/-
0.34(stat)+/-0.36(syst.exp)+/-0.17(BRD))%,BR(b--
>D+l-ν¯lX)=(2.72+/-
0.19(stat)+/-0.16(syst.exp)+/-0.18(BRD))%,BR(b--
>D*+l-ν¯lX)=(2.75+/-
0.17(stat)+/-0.13(syst.exp)+/-0.09(BRD))%,where the
D0 and D+ results include also contributions from
D*0 and D*+ decays. A fit to the distribution of
the π+/- impact parameter to the primary interaction
vertex provides a measurement of the b semileptonic branching fractions
into the D0π+/-X,
D+π+/-X and D*+π+/-X
final states. Assuming that single pion decay modes of B mesons
dominate, the partial rates for
B¯-->Dπl-νl¯ and
B¯-->D*πl-νl¯ have been
obtained, corresponding to a total branching
fraction:BR(B¯-->Dπl-νl¯)+BR(B¯--
>D*πl-νl¯)=(3.40+/-0.52(stat)+/-
0.32(syst))%.This result agrees well with the observed difference
between the total B semileptonic branching fraction and the sum of the
B¯-->Dl-νl¯ and
D*l-νl¯ branching fractions.
Physics Letters B 02/2000; 475:407-428. · 3.95 Impact Factor
-
DELPHI Collaboration,
P. Abreu,
W. Adam,
T. Adye,
P. Adzic,
Z. Albrecht,
T. Alderweireld,
G. D. Alekseev,
R. Alemany,
T. Allmendinger, [......],
J. Yi,
O. Yushchenko,
A. Zaitsev,
A. Zalewska,
P. Zalewski,
D. Zavrtanik,
E. Zevgolatakos,
N. I. Zimin,
G. C. Zucchelli,
G. Zumerle
[show abstract]
[hide abstract]
ABSTRACT: The cross-section for the process
e+e--->W+W- has been
measured with the data sample collected by DELPHI at an average
centre-of-mass energy of 182.65 GeV and corresponding to an integrated
luminosity of 53 pb-1. Based on the 770 events selected as WW
candidates, the cross-section for the doubly resonant process
σ(e+e--->W+W-
)=15.86 +/-0.69 (stat) +/-0.26 (syst) pb has been measured and
found to be in good agreement with the Standard Model expectation. The
branching fractions of the W decay were also measured. From these a
value of the CKM mixing matrix element Vcs=0.985+/-0.073
(stat)+/-0.025 (syst) was derived. Our previously published WW
cross-section measurements and the derived measurement of mW
have been revised and updated with the present cross-section measurement
to yield mW=80.49+/-0.43(stat)+/-0.09(syst)+/-0.03(LEP)
GeV/c2.
Physics Letters B 05/1999; 456:310-321. · 3.95 Impact Factor
-
DELPHI Collaboration,
P. Abreu,
T. Adye,
P. Adzic,
I. Ajinenko,
G. D. Alekseev,
R. Alemany,
P. P. Allport,
S. Almehed,
U. Amaldi, [......],
G. Wolf,
J. Yi,
O. Yushchenko,
A. Zalewska,
P. Zalewski,
D. Zavrtanik,
E. Zevgolatakos,
N. I. Zimin,
G. C. Zucchelli,
G. Zumerle
[show abstract]
[hide abstract]
ABSTRACT: The events with two photons and missing (transverse) energy collected by the DELPHI detector at centre-of-mass energies between
130 GeV and 183 GeV have been studied to search for processes of the type e+e- → YY with the subsequent decay Y → X7, where X is an undetectable neutral particle. Reactions of this kind are expected in
supersymmetric models, where the Y particle can be either the lightest neutralino, decaying to a photon and a gravitino, or
the next-to-lightest neutralino, decaying to a photon and the lightest neutralino. To study the case of long-lived Y particles,
a search for single-photon events with the reconstructed photon axis pointing far from the beam interaction region has also
been performed. No evidence for a deviation from Standard Model expectations has been observed in the data and upper limits
have been derived on the signal cross-section as a function of the the X and Y masses and of the Y mean decay path.
European Physical Journal C 04/1999; 6(3):371-384. · 3.63 Impact Factor
-
DELPHI Collaboration,
H. B. Crawley,
A. Firestone, J. Grahl,
J. W. Lamsa,
D. W. Lane,
R. Mc Kay,
W. T. Meyer,
E. I. Rosenberg,
L. Gorn, [......],
U. Mueller,
K. Muenich,
O. Passon,
R. Reinhardt,
M. A. E. Schyns,
M. Siebel,
P. Sponholz,
B. Ueberschaer,
H. Wahlen,
D. Wicke
[show abstract]
[hide abstract]
ABSTRACT: Data taken by DELPHI during the 1995 and 1996 LEP runs have been used to search for the supersymmetric partners of electron,
muon and tau leptons and of top and bottom quarks. The observations are in agreement with standard model predictions. Limits
are set on sfermion masses. Searches for long lived scalar leptons from low scale supersymmetry breaking models exclude stau
masses below 55 GeV/c2 at the 95% confidence level, irrespective of the gravitino mass.
European Physical Journal C 04/1999; 6(3):385-401. · 3.63 Impact Factor
-
D. Buskulic,
I. de Bonis,
D. Decamp,
P. Ghez,
C. Goy,
J.-P. Lees,
A. Lucotte,
M.-N. Minard,
J.-Y. Nief,
P. Odier, [......],
Y. B. Pan,
Y. Saadi,
I. J. Scott,
A. M. Walsh,
J. Walsh,
Lan Wu Sau,
X. Wu,
J. M. Yamartino,
M. Zheng,
G. Zobernig
[show abstract]
[hide abstract]
ABSTRACT: Two samples of exclusive semileptonic decays, 579 B0 ->
D*+l-νl events and 261 B0
-> D+l-νl events, are selected
from approximately 3.9 million hadronic Z decays collected by the ALEPH
detector at LEP. From the reconstructed differential decay rate of each
sample, the product of the hadronic form factor F(ω) at zero
recoil of the D(*)+ meson and the CKM matrix element
Vcb are measured to be FD*+ (1)
Vcb = (31.9 +/- 1.8stat +/- 1.9syst)
× 10-3,FD+ (1) Vcb =
(27.8 +/- 6.8stat +/- 6.5syst) ×
10-3. The ratio of the form factorsFD+
(1) and FD*+ (1) is measured to
beFD+ (1)/FD*+ (1) = 0.87
+/- 0.22stat +/- 0.21syst. A value of
Vcb is extracted from the two samples, using theoretical
constraints on the slope and curvature of the hadronic form factors and
their normalization at zero recoil, with the result Vcb =
(34.4 +/- 1.6stat +/- 2.3syst +/-
1.4th) × 10-3. The branching fractions are
measured from the two integrated spectra to be Br(B0 ->
D*+l-νl) = (5.53 +/-
0.26stat +/- 0.52syst) %, Br(B0 ->
D+l-νl) = (2.35 +/-
0.20stat +/- 0.44syst) %.
Physics Letters B 01/1997; 395:373-387. · 3.95 Impact Factor
-
ALEPH Collaboration,
D. Buskulic,
I. De Bonis,
D. Decamp,
P. Ghez,
C. Goy,
J. P. Lees,
A. Lucotte,
M. N. Minard,
P. Odier, [......],
M. Schmitt,
I. J. Scott,
V. Sharma,
J. D. Turk,
A. M. Walsh,
Sau Lan Wu,
X. Wu,
J. M. Yamartino,
M. Zheng,
G. Zobernig
[show abstract]
[hide abstract]
ABSTRACT: The electroweak mixing angle is determined with high precision from measurements of the mean difference between forward and
backward hemisphere charges in hadronic decays of the Z. A data sample of 2.5 million hadronic Z decays recorded over the
period 1990 to 1994 in the ALEPH detector at LEP is used. The mean charge separation between event hemispheres containing
the original quark and antiquark is measured for
b[`(b)]b\bar b
and
c[`(c)]c\bar c
events in subsamples selected by their long lifetimes or using fastD*’s. The corresponding average charge separation for light quarks is measured in an inclusive sample from the anticorrelation
between charges of opposite hemispheres and agrees with predictions of hadronisation models with a precision of 2%. It is
shown that differences between light quark charge separations and the measured average can be determined using hadronisation
models, with systematic uncertainties constrained by measurements of inclusive production of kaons, protons andΛ’s. The separations are used to measure the electroweak mixing angle precisely as sin2
ϑ
w
eff
=0.2322±0.0008(exp.stat.) ±0.0007(exp.syst.)±0.0008(sep.). The first two errors are due to purely experimental sources whereas
the third stems from uncertainties in the quark charge separations.
Zeitschrift für Physik C 06/1996; 71(3):357-378.
-
ALEPH Collaboration,
D. Buskulic,
I. De Bonis,
D. Decamp,
P. Ghez,
C. Goy,
J. P. Lees,
A. Lucotte,
M. N. Minard,
P. Odier, [......],
Y. Saadi,
M. Schmitt,
I. J. Scott,
V. Sharma,
A. M. Walsh,
Sau Lan Wu,
X. Wu,
J. M. Yamartino,
M. Zheng,
G. Zobernig
[show abstract]
[hide abstract]
ABSTRACT: The lifetimes of theB
0 andB
+ mesons have been measured with theAleph detector at LEP, using approximately 3 million hadronic Z decays collected in the period 1991–1994. In the first of three
methods, semileptonic decays ofB
0 andB
+ mesons were partially reconstructed by identifying events containing a lepton with an associatedD*− or[`(D)]0\bar D^0 meson. The second method used fully reconstructedB
0 andB
+ mesons. The third method, used to measure theB
0 lifetime, employed a partial reconstruction technique to identifyB
0→D*−
π
+
X decays.
The combined results are
t0 = 1.55 ±0.06 ±0.03 ps, t+ = 1.58 ±0.09 ±0.03 ps, \tfract+ t0 = 1.03 ±0.08 ±0.02. \begin{gathered} \tau _0 = 1.55 \pm 0.06 \pm 0.03 ps, \hfill \\ \tau _ + = 1.58 \pm 0.09 \pm 0.03 ps, \hfill \\ \tfrac{{\tau _ + }}{{\tau _0 }} = 1.03 \pm 0.08 \pm 0.02. \hfill \\ \end{gathered}
.
Zeitschrift für Physik C 04/1996; 71(1):31-44.
-
D. Buskulic,
I. de Bonis,
D. Decamp,
P. Ghez,
C. Goy,
J. P. Lees,
A. Lucotte,
M. N. Minard,
P. Odier,
B. Pietrzyk, [......],
Y. Saadi,
M. Schmitt,
I. J. Scott,
V. Sharma,
A. M. Walsh,
Sau Lan Wu,
X. Wu,
J. M. Yamartino,
M. Zheng,
G. Zobernig
[show abstract]
[hide abstract]
ABSTRACT: The lifetimes of the B 0 and B + mesons have been
measured with the Aleph detector at LEP, using approximately 3 million
hadronic Z decays collected in the period 1991 1994. In the first of
three methods, semileptonic decays of B 0 and B +
mesons were partially reconstructed by identifying events containing a
lepton with an associated D*- orbar D^0 meson. The
second method used fully reconstructed B 0 and B +
mesons. The third method, used to measure the B 0 lifetime,
employed a partial reconstruction technique to identify B
0→ D*- π + X decays. The
combined results are begin{gathered} tau _0 = 1.55 ± 0.06
± 0.03 ps, \ tau _ + = 1.58 ± 0.09 ± 0.03 ps, \
tfrac{{tau _ + }}{{tau _0 }} = 1.03 ± 0.08 ± 0.02. \ .
Zeitschrift für Physik C 02/1996; 71:31-44.
-
Damir Buskulic,
I De Bonis,
D Décamp,
P Ghez,
C Goy,
J P Lees,
A Lucotte,
M N Minard,
P Odier,
B Pietrzyk, [......],
M Schmitt,
I J Scott,
V Sharma,
J Turk,
A M Walsh,
Wu Sau Lan,
X Wu,
J M Yamartino,
M Zheng,
G Zobernig
[show abstract]
[hide abstract]
ABSTRACT: Search for supersymmetric particles in e+e- collisions at centre-of-mass energies of 130 and 136 GeV. Searches for supersymmetric particles produced in e+e- collisions at centre-of-mass energies of 130 and 136 GeV have been performed in a data sample of 5.7 pb-1 collected in the autumn of 1995 by the ALEPH detector at LEP. No candidate events were found, allowing limits to be set on the masses and production cross-sections of scalar leptons, scalar tops charginos and neutralinos. The domains previously excluded at LEP1 are substantially extended. For instance, masses of gaugino-like charginos smaller than 67.8 GeV/c2 are excluded at the 95% C.L. for scalar neutrino masses larger than 200 GeV/c2.
Physics Letters B 02/1996; 373((1-3)):246 - 260. · 3.95 Impact Factor
