Neutrino Masses and Lepton-flavor-violating τ\tau Decays in the Supersymmetric Left-right Model

In the supersymmetric left-right model, the light neutrino masses are given by the Type-II seesaw mechanism. A duality property about this mechanism indicates that there exist eight possible Higgs triplet Yukawa couplings which result in the same neutrino mass matrix. In this paper, We work out the one-loop renormalization group equations for the effective neutrino mass matrix in the supersymmetric left-right model. The stability of the Type-II seesaw scenario is briefly discussed. We also study the lepton-flavor-violating processes ($\tau\to \mu\gamma$ and $\tau\to e\gamma$) by using the reconstructed Higgs triplet Yukawa couplings

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

Observations And Cures Of Electron-Cloud Effects At

Th luminosityofth KEKB B-Factoryis currentlylimited bya single-beam blowup at th low-energypositron ring (LER). Its major chzA2zy[z2zH4y are well-consistent with single-bunch h ead-tail instabilitycaused byth ph9fi electron cloud (Zimmermann and Ohfi""xMy Th"" remain, h wever, a few strange observationswhon are not expected fromth model

Observation Of Transverse Coupled Bunch Instability At

Transverse coupled bunch instability was experimentally studied in low energy positron ring (LER) and high energy electron ring (HER) at KEKB. The oscillations of bunches were recorded by a bunch oscillation recorder for the total of 4096 turns. The data were analysed to obtain the mode distribution and the growth rate of oscillation. The result of the analysis is presented in this paper

Special Beam Position Monitor With 8-Button Electrodes

To maintain the optimum collision condition of the two beams, two special BPMs with 8-button electrodes, called OCTOPOS, were installed inside the super-conducting quadrupole magnets (QCSs) at the interaction region (IR) of KEKB. We have commissioned the OCTOPOS BPMs for simultaneous measurements of both the electron and positron beam positions from their composite signal. A collision orbital feedback using OCTOPOS has been put into practical application since last November. The position of each beam is separable by analyzing the nonlinearity of the pickup sensitivity from the signal amplitudes of the eight button electrodes. This report describes the characterization of the OCTOPOS and its performance