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CERN Document Server Encontrados 2,048 registros  1 - 10siguientefinal  ir al registro: La búsqueda tardó 0.94 segundos. 
1.
(100)
Search for pentaquarks states in Z decays / ALEPH Collaboration
Exotic hadrons made of five quarks (pentaquarks) are searched for in hadronic Z decays collected by the ALEPH detector at LEP. No significant signal is observed. [...]
CERN-PH-EP-2004-038.- Geneva : CERN, 2004 - 18 p. ALEPH Papers - Published in : Phys. Lett. B 599 (2004) 1-16 Fulltext: PDF; - CERN library copies
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2.
(91)
Search for pentaquark states in Z decays / ALEPH Collaboration
Exotic hadrons made of five quarks (pentaquarks) are searched for in hadronic Z decays collected by the ALEPH detector at LEP. No significant signal is observed. [...]
2004 - Published in : Phys. Lett. B 599 (2004) 1-16
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3.
(72)
Search for Pentaquarks in the Hadronic Decays of the Z Boson with the DELPHI Detector at LEP / DELPHI Collaboration
The quark model does not exclude states composed of more than three quarks, like pentaquark systems. Controversial evidence for such states has been published in the last years, in particular: for a strange pentaquark Theta(1540)+; for a double-strange state, the Xi(1862)--, subsequently called Phi(1860)--; and for a charmed state, the Theta_c(3100)^0. [...]
arXiv:0708.0415; CERN-PH-EP-2007-017; CERN-DELPHI-2006-012-CONF-758; DELPHI-2006-012-CONF-758; CERN-DELPHI-PAPER-364; CERN-PH-EP-2007-017.- 2007 - 15 p. - Published in : Phys. Lett. B 653 (2007) 151-160 Fulltext: cer-002651149 - PDF; arXiv:0708.0415 - PDF; External link: Preprint
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4.
(52)
Strange b baryon production and lifetime in Z decays / ALEPH Collaboration
In a data sample of approximately four million hadronic Z decays recorded with the ALEPH detector from 1990 to 1995, a search for the strange b baryon Xi_b is performed with a study of Xi-lepton correlations. Forty-four events with same sign Xi- l- combinations are found whereas 8.4 are expected based on on the rate of opposite sign Xi- l+ combinations. [...]
CERN-PPE-96-081; FSU-SCRI-96-125.- Geneva : CERN, 1996 - 14 p. ALEPH Papers - Published in : Phys. Lett. B 384 (1996) 449-460 Fulltext: PDF;
In : 28th International Conference on High-energy Physics, Warsaw, Poland, 25 - 31 Jul 1996, pp.PA01-071 - CERN library copies
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5.
(40)
A study of the decay width difference in the $B^{0}_{s}-\overline{B}^{0}_{s}$ system using $\phi\phi$ correlations / ALEPH Collaboration
In a data sample of about four million hadronic Z decays recorded with the ALEPH detector from 1991 to 1995, the $B^{0}_{s} \to D^{(*)+}_{s}D^{(*)-}_{s}$ decay is observed, based on tagging the nal state with two $\phi$ mesons in the same hemisphere. The $D^{(*)+}_{s}D^{(*)-} _{s}$ final state is mostly CP even and corresponds to the short-lived $B^0$ mass eigenstate. [...]
CERN-EP-2000-036.- Geneva : CERN, 2000 - 20 p. ALEPH Papers - Published in : Phys. Lett. B 486 (2000) 286-99 Fulltext: ep-2000-036_version1 - PDF; ep-2000-036 - PDF; External link: Published version
In : 30th International Conference on High-energy Physics, Osaka, Japan, 27 Jul - 2 Aug 2000, pp.e-page 137 - CERN library copies
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6.
(39)
Measurement of the Michel parameters and the $\nu_{\tau}$ helicity in $\tau$ lepton decays / ALEPH Collaboration
A measurement of the Michel parameters and the average $\nu_\tau$ helicity in $\tau$ lepton decays is described. The data was collected with the ALEPH detector at LEP during the years 1991 to 1995. [...]
CERN-EP-2001-035.- Geneva : CERN, 2001 - 26 p. ALEPH Papers - Published in : Eur. Phys. J. C 22 (2001) 217 Fulltext: PDF; - CERN library copies
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7.
(38)
Measurement of charge asymmetry in hadronic Z decays / ALEPH Collaboration
CERN-PPE-91-27.- Geneva : CERN, 1991 - 23 p. ALEPH Papers - Published in : Phys. Lett. B 259 (1991) 377-388 Fulltext: PDF; - CERN library copies
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8.
(38)
A measurement of the inclusive $b \rightarrow s \gamma$ branching ratio / ALEPH Collaboration
The flavour changing neutral current decay b -> s gamma has been detected in hadronic Z decays collected by ALEPH at LEP. The signal is isolated in lifetime-tagged b-bbar events by the presence of a hard photon associated with a system of high momentum and high rapidity hadrons. [...]
CERN-EP-98-044.- Geneva : CERN, 1998 - 16 p. ALEPH Papers - Published in : Phys. Lett. B 429 (1998) 169-187 Fulltext: PDF; - CERN library copies
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9.
(38)
Measurement of the polarization of $\tau$ leptons produced in Z decays / ALEPH Collaboration
CERN-PPE-91-94.- Geneva : CERN, 1991 - 29 p. ALEPH Papers - Published in : Phys. Lett. B 265 (1991) 430-444 Fulltext: PDF; - CERN library copies
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10.
(37)
Search for pentaquark states in Z decays
A search for exotic baryons containing five quarks has been carried out in hadronic Z decays using the ALEPH detector at LEP I. No significant signal has been found [...]
CERN-ALEPH-2004-005.- Geneva : CERN, 2004 - 15 p. Fulltext: PDF;
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