\tau\to \mu \bar{\nu_i} \nu_i decay in the general two Higgs doublet model

We study \tau\to \mu \bar{\nu_i} \nu_i, i=e,\mu,\tau decay in the model III version of the two Higgs doublet model. We calculated the BR at the order of the magnitude of 10^{-6}-10^{-4} for the intermediate values of the Yukawa couplings. Furthermore, we predict the upper limit of the coupling for the \tau-h^0 (A^0)-\tau transition as \sim 0.3 in the case that the BR is \sim 10^{-6}. We observe that the experimental result of the process under consideration can give comprehensive information about the physics beyond the standard model and the free parameters existing.Comment: 9 pages, 5 figure

Prospects for Pentaquark Searches in e+e−e^+e^- Annihilations and γγ\gamma\gamma Collisions

Recent strong experimental evidence of a narrow exotic S = +1 baryon resonance, $\Theta^+$, suggests the existence of other exotic baryons. We discuss the prospects of confirming earlier experimental evidence of $\Theta^+$ and the observation of additional hypothetical exotic baryons in $e^+e^-$ annihilations and $\gamma\gamma$ collisions at LEP and B Factories

Search for lepton-flavour-violating decays of the Higgs and Z bosons with the ATLAS detector

Direct searches for lepton flavour violation in decays of the Higgs and Z bosons with the ATLAS detector at the LHC are presented. The following three decays are considered: H→eτ, H→μτ, and Z→μτ. The searches are based on the data sample of proton–proton collisions collected by the ATLAS detector corresponding to an integrated luminosity of 20.3 fb−1 at a centre-of-mass energy of s√=8 TeV. No significant excess is observed, and upper limits on the lepton-flavour-violating branching ratios are set at the 95 % confidence level: Br (H→eτ)<1.04%, Br (H→μτ)<1.43%, and Br (Z→μτ)<1.69×10−5

Search for charged scalar leptons using the OPAL detector at root s=161 GeV

Contains fulltext : 124919.pdf (preprint version ) (Open Access

Measurement of the Mass of the Z-Boson and the Energy Calibration of Lep

Contains fulltext : 26847___.PDF (publisher's version ) (Open Access

Measurement of the average b hadron lifetime in Z0 decays

Contains fulltext : 124444.pdf (preprint version ) (Open Access) Contains fulltext : 124444.pdf (publisher's version ) (Closed access

Search for the minimal Standard Model Higgs boson

Contains fulltext : 124485pre.pdf (preprint version ) (Open Access) Contains fulltext : 124485pub.pdf (publisher's version ) (Open Access

Measurement of the time dependence of B(d)0 <---> anti-B(d)0 mixing using leptons and D*+- mesons

Contains fulltext : 124474.pdf (preprint version ) (Open Access

Multiplicity and transverse momentum correlations in multi - hadronic final states in e+ e- interactions at S**(1/2) = 91.2-GeV

Contains fulltext : 124478.pdf (preprint version ) (Open Access