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We present the first evidence of the decay B- --> tau- nu(tau), using 414 fb(-1) of data collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+ e- collider. Events are tagged by fully reconstructing one of the B mesons in hadronic modes. We detect the signal with a significance of 3.5 standard deviations including(More)
We observe evidence for D(0)-D(0) mixing by measuring the difference in the apparent lifetime when a D(0) meson decays to the CP eigenstates K(+)K(-) and pi(+)pi(-) and when it decays to the final state K(-)pi(+). We find the relative difference of the lifetimes y(CP) to be [1.31+/-0.32(stat)+/-0.25(syst)]%, 3.2 standard deviations from zero. We also search(More)
The ATLAS beam conditions monitor (BCM) was developed as a stand-alone device allowing separation of LHC p-p collisions from background events induced on beam gas or by beam accidents. This separation can be achieved by timing coincidences between two detector rings placed symmetrically around the interaction point at z=plusmn184 cm and r=55 mm (eta~4.2).(More)
This paper describes the silicon microstrip modules in the barrel section of the SemiConductor Tracker (SCT) of the ATLAS experiment at the CERN Large Hadron Collider (LHC). The module requirements, components and assembly techniques are given, as well as first results of the module performance on the fully-assembled barrels that make up the detector being(More)
We report the first measurement of the forward-backward asymmetry and the ratios of Wilson coefficients and in A9/A7 and A10/A7 in B --> K*l+l-, where l represents an electron or a muon. We find evidence for the forward-backward asymmetry with a significance of 3.4sigma. The results are obtained from a data sample containing 386 x 10(6) BB pairs that were(More)
The Collins effect connects transverse quark spin with a measurable azimuthal dependence in the yield of hadronic fragments around the quark's momentum vector. Using two different reconstruction methods, we find evidence of statistically significant azimuthal asymmetries for charged pion pairs in e(+)e(-) annihilation at a center-of-mass energy of 10.52(More)
I. Ariño, b J. Bastos, c D. Broemmelsiek, d J. Carvalho, c M. Chmeissani, b P. Conde, b J. Davila, g D. Dujmić, a R. Eckmann, a L. Garrido, b D. Gascon, b T. Hamacher, a,1 A. Gorǐsek, i I. Ivaniouchenkov, c M. Ispirian, g S. Karabekian, e,2 M. Kim, a S. Korpar, k,i P. Križan, j,i S. Kupper, i,3 K. Lau, g P. Maas, d J. McGill, a,4 R. Miquel, b,5 N. Murthy, g(More)
CP violation in B-->J/PsiK* decays is studied using an angular analysis in a data sample of 253 fb(-1) recorded with the Belle detector at the KEKB e(+)e(-) collider. The flavor separated measurements of the decay amplitudes indicate no evidence for direct CP violation. T-odd CP violation is studied using the asymmetries in triple product correlations, and(More)
Detectors and electronics inside the ATLAS detector at the large hadron collider will be exposed to high fluxes of photons, charged particles, and neutrons. Damage caused by radiation will influence the performance of the detector. It will therefore be important to continuously monitor the radiation dose to follow the level of detector degradation. It will(More)