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CERN Document Server 找到 124 笔记录  1 - 10下一个最後  跳到记录: 检索需时 0.62 秒. 
1.
Determination of the partial width and forward-backward asymmetry of the $Z^{o}$ boson into $b\bar{b}$ final states / De Boeck, Helene
CERN-DELPHI-THESIS-075 ; DELPHI-THESIS-075. - Antwerp : Antwerp Univ., 1994. - 190 p.

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2.
Measurement of Inclusive $\omega$ and $\eta$' Production in Hadronic Z Decays / L3 Collaboration
We present a study of the inclusive $\omega$ and $\eta^{\prime}$ production based on 3.1 million hadronic Z decays recorded with the L3 detector at LEP during 1991--1994. The production rates per hadronic Z decay have been measured to be $1.17 \pm 0.17 $ $\omega$ mesons and $0.25 \pm 0.04 $ $\eta^{\prime}$ mesons [...]
CERN-PPE-96-171; CERN-L3-106.- Geneva : CERN, 1997 - 19 p. - Published in : Phys. Lett. B 393 (1997) 465-476 Fulltext: PDF; - Please contact the library if you need to access this document.
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3.
Study of the Weak Charged Hadronic Current in b Decays / L3 Collaboration
Charged and neutral particle multiplicities of jets associated with identified semileptonic and hadronic b decays are studied. The observed differences between these jets are used to determine the inclusive properties of the weak charged hadronic current [...]
CERN-PPE-96-170; CERN-L3-107.- Geneva : CERN, 1997 - 15 p. - Published in : Phys. Lett. B 393 (1997) 477-486 Fulltext: PDF; - Please contact the library if you need to access this document.
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4.
Search for Exclusive B Decays to J and $\eta$ or $\pi^{0}$ with the L3 Detector / L3 Collaboration
A search for exclusive decays of $\ensuremath{\mathrm{B_d^0}}$ and $\ensuremath{\mathrm{B_s^0}}$ mesons has been performed in the channels $\ensuremath{\mathrm{B_d^0}\rightarrow\mathrm{J}\eta}$,\,\, $\ensuremath{\mathrm{B_s^0}\rightarrow\mathrm{J}\eta}$,\,\, $\ensuremath{\mathrm{B_d^0}\rightarrow\mathrm{J}\pi^0}$ and $\ensuremath{\mathrm{B_s^0}\rightarrow\mathrm{J}\pi^0}$. The data sample consisted of more than three and half million hadronic $\ensuremath{\mathrm {Z}}$ decays collected by the L3 experiment at LEP from 1991 through 1995 [...]
CERN-PPE-96-152; CERN-L3-105.- Geneva : CERN, 1997 - 15 p. - Published in : Phys. Lett. B 391 (1997) 481-490 Fulltext: PDF; - Please contact the library if you need to access this document.
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5.
Search for neutral B meson decays to two charged leptons / L3 Collaboration
The decays $\mathrm{B_d^0,\,B_s^0 \rightarrow e^+e^-,\,\mu^+\mu^-,\, e^\pm\mu^\mp}$ are searched for in 3.5 million hadronic ${\mathrm{Z}}$ events, which constitute the full LEP I data sample collected by the L3 detector. No signals are observed, therefore upper limits at the 90\%(95\%) confidence levels are set on the following branching fractions: % \begin{center}% {\setlength{\tabcolsep}{2pt} \begin{tabular}{lccccclcccc}% % Br$({\mathrm{B_d^0 \rightarrow {\mathrm{e^+e^-}}}})$ & $<$ & $1.4(1.8)$ & $\times$ & $ 10^{-5}$; & \hspace*{5mm} & Br$({\mathrm{B_s^0 \rightarrow {\mathrm{e^+e^-}}}})$ & $<$ & $5.4(7.0)$ & $\times$ & $ 10^{-5}$; \\% Br$({\mathrm{B_d^0 \rightarrow \mu^+\mu^-}})$ & $<$ & $1.0(1.4)$ & $\times$ & $ 10^{-5}$; & \hspace*{5mm} & Br$({\mathrm{B_s^0 \rightarrow \mu^+\mu^-}})$ & $<$ & $3.8(5.1)$ & $\times$ & $ 10^{-5}$; \\% Br$({\mathrm{B_d^0 \rightarrow {\mathrm{e^\pm\mu^\mp}}}})$ & $<$ & $1.6(2.0)$ & $\times$ & $ 10^{-5}$; & \hspace*{5mm} & Br$({\mathrm{B_s^0 \rightarrow {\mathrm{e^\pm\mu^\mp}}}})$ & $<$ & $4.1(5.3)$ & $\times$ & $ 10^{-5}$. [...]
CERN-PPE-96-151; CERN-L3-104.- Geneva : CERN, 1997 - 8 p. - Published in : Phys. Lett. B 391 (1997) 474-480 Fulltext: PDF; - Please contact the library if you need to access this document.
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6.
Measurement of the Lifetime of the $\tau$ Lepton / L3 Collaboration
The lifetime of the tau lepton is measured using data collected in 1994 by the L3 detector at LEP. The precise track position information of the Silicon Microvertex Detector is exploited. [...]
CERN-PPE-96-124; CERN-L3-103.- Geneva : CERN, 1996 - 14 p. - Published in : Phys. Lett. B 389 (1996) 187-196 Fulltext: PDF; - Please contact the library if you need to access this document.
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7.
Measurement of the B$_{d}^{0}$ meson oscillation frequency / L3 Collaboration
Time-dependent \Bd-\Bbd\ mixing is studied using 1.5 million hadronic Z decays collected by L3. Semileptonic B decays are selected by requiring at least one reconstructed lepton in both thrust hemispheres [...]
CERN-PPE-96-073; CERN-L3-101.- Geneva : CERN, 1996 - 19 p. - Published in : Phys. Lett. B 383 (1996) 487-498 Fulltext: PDF; - Please contact the library if you need to access this document.
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8.
Search for new particles in hadronic events with isolated photons / L3 Collaboration
CERN-PPE-96-050; CERN-L3-100.- Geneva : CERN, 1996 - 17 p. - Published in : Phys. Lett. B 388 (1996) 409-418 Fulltext: PDF; - Please contact the library if you need to access this document.
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9.
Measurement of the branching ratios b --> e$\nu$X, $\mu\nu$X, $\tau\nu$X and $\nu$X / L3 Collaboration
CERN-PPE-96-049; CERN-L3-099.- Geneva : CERN, 1996 - 27 p. - Published in : Z. Phys. C 71 (1996) 379-389 Fulltext: PDF; - Please contact the library if you need to access this document.
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10.
Observation of multiple hard photon final states at $\sqrt{s}$ = 130 - 140 GeV at LEP / L3 Collaboration
CERN-PPE-96-048; CERN-L3-098.- Geneva : CERN, 1996 - 16 p. - Published in : Phys. Lett. B 384 (1996) 323-332 Fulltext: PDF; - Please contact the library if you need to access this document.
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