CERN Accelerating science

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1.
Investigation of the Decay of Orbitally-Excited B Mesons and First Measurement of the Branching Ratio $BR(B^{*}_{J} \rightarrow B^{*}\pi(X))$ / OPAL Collaboration
From about 4 million hadronic Z decays recorded by the OPAL detector on and near to the Z resonance, we select a sample of more than 570000 inclusively reconstructed B mesons. Orbitally-excited mesons B*J are reconstructed using Bpi+- combinations. [...]
hep-ex/0010031; CERN-EP-2000-125; CERN-EP-2000-125.- Geneva : CERN, 2002 - 47 p. - Published in : Eur. Phys. J. C 23 (2002) 437-54 Fulltext: 0010031 - PDF; arXiv:hep-ex_0010031 - PDF; External link: Preprint - Please contact the library if you need to access this document.
2.
A Measurement of Semileptonic B Decays to Narrow Orbitally-Excited Charm Mesons / OPAL Collaboration
The decay chain b -> Bbar -> D^{**0} l nu X, D^{**0} -> D^{*+} pi^-, D^{*+} -> D^0 pi^+, D^0 ->(Kpi or K3pi) is identified in a sample of 3.9 million hadronic Z decays collected with the OPAL detector at LEP. The branching ratio BR (b -> Bbar) x BR (Bbar -> D^0_1 l nu X) x BR (D^0_1 -> D^{*+} pi^-) is measured to be (2.64 +- 0.79 (stat) +- 0.39 (syst)) X 10^-3 for the J^P = 1^+ (D^0_1) state. [...]
hep-ex/0301018; CERN-EP-2002-094; CERN-EP-2002-094.- Geneva : CERN, 2003 - 20 p. - Published in : Eur. Phys. J. C 30 (2003) 467-475 Fulltext: ep-2002-094 - PDF; arXiv:hep-ex_0301018 - PDF; External link: Preprint - Please contact the library if you need to access this document.
3.
Investigation of the Decay of Orbitally-Excited B Mesons and First Measurement of the Branching Ratio BR ( B*_J -- B* pi )
CERN-OPAL-PN-400 ; OPAL-PN-400.
- 1999.
Fulltext - Fulltext
4.
Measurement of the Spectroscopy of Orbitally Excited B Mesons at LEP / L3 Collaboration
We measure the masses, decay widths and relative production rate of orbitally excited B mesons using $1.25$ million hadronic Z decays recorded by the L3 detector. B-meson candidates are inclusively reconstructed and combined with charged pions produced at the primary event vertex. [...]
hep-ex/9909018; CERN-EP-99-116; CERN-EP-99-116; CERN-L3-181.- Geneva : CERN, 1999 - 16 p. - Published in : Phys. Lett. B 465 (1999) 323-334 Fulltext: arXiv:hep-ex_9909018 - PDF; ep-99-116 - PDF; External link: Preprint - Please contact the library if you need to access this document.
5.
Identified Charged Particles in Quark and Gluon Jets / DELPHI Collaboration
A sample of 2.2 million hadronic \z decays, selected fythe {\sc Delphi} detector at {\sc Lep} during 1994-199nimprovedmeasurement of inclusive distributions of \pie, \kp anrantiparticles in gluon and quark jets. The production l identified particles were found to be softer in gluon kjets, with a higher multiplicity in gluon jets as obseecharged particles. [...]
hep-ex/0106063; CERN-EP-2000-007; CERN-EP-2000-007.- Geneva : CERN, 2000 - 26 p. - Published in : Eur. Phys. J. C 17 (2000) 207-222 Fulltext: ep-2000-007_version1 - PDF; ep-2000-007_version3 - PDF; ep-2000-007_version2 - PDF; arXiv:hep-ex_0106063 - PDF; External link: Preprint - Please contact the library if you need to access this document.
6.
A Measurement of the Tau Topological Branching Ratios / DELPHI Collaboration
Using data collected in the DELPHI detector at LEP-1, measurements of the inclusive tau branching ratios for decay modes containing one, three, or five charged particles have been performed, giving the following results: B_1 = B(\tau^- -> (particle)^- \geq 0pi^0 \geq 0K^0 \nu_\tau(\bar{\nu})) = (85.316 +/- 0.093 +/- 0.049)%; B_3 = B(\tau^- -> 2h^-h^+ \geq 0pi^0 \geq 0K^0 \nu_\tau) = (14.569 +/- 0.093 +/- 0.048)%; B_5 = B(\tau^- -> 3h^-2h^+ \geq 0pi^0 \geq 0K^0 \nu_\tau) = (0.115 +/- 0.013 +/- 0.006)%, where h is either a charged pi or K meson. The first quoted uncertainties are statistical and the second systematic..
hep-ex/0105047; CERN-EP-2001-030; CERN-DELPHI-2001-091-CONF-519; CERN-EP-2001-030; DELPHI-2001-091-CONF-519.- Geneva : CERN, 2001 - 32 p. - Published in : Eur. Phys. J. C 20 (2001) 617-637 Fulltext: 0105047 - PDF; arXiv:hep-ex_0105047 - PDF; External link: Preprint - Please contact the library if you need to access this document.
7.
The $\eta_c$(2980) formation in two-photon collisions at LEP energies / DELPHI Collaboration
eta_c(2980) production in gamma-gamma interactions has been detected via its decays into K0_s K+/- pi-/+, K+ K- K+ K- and K+ K- pi+ pi- in the data taken with the DELPHI detector at LEP1 and LEP2 energies. The two-photon radiative width averaged over all observed decay channels is \Gamma_{\gamma\gamma} = 13.9 +/- 2.0 (stat.) +/- 1.4 (syst.) +/- 2.7 (BR) keV. [...]
hep-ex/0311002; CERN-EP-2003-035; CERN-EP-2003-035.- Geneva : CERN, 2003 - 12 p. - Published in : Eur. Phys. J. C 31 (2003) 481-489 Fulltext: arXiv:hep-ex_0311002 - PDF; ep-2003-035 - PDF; External link: Preprint - Please contact the library if you need to access this document.
8.
A Measurement of the Tau Hadronic Branching Ratios / DELPHI Collaboration
The exclusive and semi-exclusive branching ratios of the tau lepton hadronic decay modes (h- v_t, h- pi0 v_t, h- pi0 pi0 v_t, h- \geq 2pi0 v_t, h- \geq 3pi0 v_t, 2h- h+ v_t, 2h- h+ pi0 v_t, 2h- h+ \geq 2pi0 v_t, 3h- 2h+ v_t and 3h- 2h+ \geq 1pi0 v_t) were measured with data from the DELPHI detector at LEP..
hep-ex/0603044; CERN-PH-EP-2004-046; CERN-PH-EP-2004-046; DELPHI-2005-016-CONF-736.- Geneva : CERN, 2006 - 53 p. - Published in : Eur. Phys. J. C 46 (2006) 1-26 Fulltext: 0603044 - PDF; arXiv:hep-ex_0603044 - PDF; phep-2004-046 - PDF; External link: Preprint
9.
Measurement of the $\overline{B} \to D^{(*)}\pi l\overline{\nu}_l$ Branching Fraction / DELPHI Collaboration
A study of $b$ semileptonic decays into $D$, $D\pi^{\pm}$ and $D^*\pi^{\pm}$ final states is presented.The $D^0$, $D^+$ and $D^{*+}$ mesons are exclusively reconstructed in $Z$ decay data recorded from 1992 to 1995in the DELPHI experiment at LEP. The overall branching fractions are measured to be: $BR(b -> D^0 \ell^- \bar{\nu}_{\ell} X) = (7.04 +/- 0.34 (stat) +/- 0.36 (syst.exp) +/- 0.17 (BR_D))\%,$ $BR(b -> D^+ \ell^- \bar{\nu}_{\ell} X) = (2.72 +/- 0.19 (stat) +/- 0.16 (syst.exp) +/- 0.18 (BR_D))\%$, $BR(b -> D^{*+} \ell^- \bar{\nu}_{\ell} X) = (2.75 +/- 0.17 (stat) +/- 0.13 (syst.exp) +/- 0.09 (BR_D))\%$ where the $D^0$ and $D^+$ results include also contributions from $D^{*0}$ and $D^{*+}$ decays..
hep-ex/0105052; CERN-EP-99-174; CERN-EP-99-174.- Geneva : CERN, 2000 - 25 p. - Published in : Phys. Lett. B 475 (2000) 407-28 Fulltext: ep-1999-174 - PDF; arXiv:hep-ex_0105052 - PDF; External link: Preprint - Please contact the library if you need to access this document.
10.
A measurement of the $B^{0}_{s}$ lifetime using reconstructed $D^{-}_{s}$ mesons / OPAL Collaboration
We report a measurement of the B^0_s meson lifetime from B_s^0 -> D^-_s X decays, where D_s^- mesons are reconstructed in the D_s^- -> phi pi^- and D_s^- -> K^{*0} K^- decay channels. From approximately 3.7 million hadronic Z^0 decays recorded by the OPAL detector at LEP a sample is selected containing 911 +/- 83 candidates, of which 519 +/- 136 are estimated to be from B_s^0 meson decays. [...]
hep-ex/9708023; CERN-PPE-97-095; CERN-PPE-97-95; CERN-PPE-97-095.- Geneva : CERN, 1998 - 20 p. - Published in : Eur. Phys. J. C 2 (1998) 407-416 Fulltext: ppe-97-095 - PDF; arXiv:hep-ex_9708023 - PDF; - Please contact the library if you need to access this document.

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