Measurement of the B0 Lifetime and Oscillation Frequency using B0->D*+l-v decays

The lifetime and oscillation frequency of the B0 meson has been measured using B0->D*+l-v decays recorded on the Z0 peak with the OPAL detector at LEP. The D*+ -> D0pi+ decays were reconstructed using an inclusive technique and the production flavour of the B0 mesons was determined using a combination of tags from the rest of the event. The results t_B0 = 1.541 +- 0.028 +- 0.023 ps, Dm_d = 0.497 +- 0.024 +- 0.025 ps-1 were obtained, where in each case the first error is statistical and the second systematic.Comment: 17 pages, 4 figures, submitted to Phys. Lett.

Heavy quarkonium: progress, puzzles, and opportunities

A golden age for heavy quarkonium physics dawned a decade ago, initiated by the confluence of exciting advances in quantum chromodynamics (QCD) and an explosion of related experimental activity. The early years of this period were chronicled in the Quarkonium Working Group (QWG) CERN Yellow Report (YR) in 2004, which presented a comprehensive review of the status of the field at that time and provided specific recommendations for further progress. However, the broad spectrum of subsequent breakthroughs, surprises, and continuing puzzles could only be partially anticipated. Since the release of the YR, the BESII program concluded only to give birth to BESIII; the $B$-factories and CLEO-c flourished; quarkonium production and polarization measurements at HERA and the Tevatron matured; and heavy-ion collisions at RHIC have opened a window on the deconfinement regime. All these experiments leave legacies of quality, precision, and unsolved mysteries for quarkonium physics, and therefore beg for continuing investigations. The plethora of newly-found quarkonium-like states unleashed a flood of theoretical investigations into new forms of matter such as quark-gluon hybrids, mesonic molecules, and tetraquarks. Measurements of the spectroscopy, decays, production, and in-medium behavior of c\bar{c}, b\bar{b}, and b\bar{c} bound states have been shown to validate some theoretical approaches to QCD and highlight lack of quantitative success for others. The intriguing details of quarkonium suppression in heavy-ion collisions that have emerged from RHIC have elevated the importance of separating hot- and cold-nuclear-matter effects in quark-gluon plasma studies. This review systematically addresses all these matters and concludes by prioritizing directions for ongoing and future efforts.Comment: 182 pages, 112 figures. Editors: N. Brambilla, S. Eidelman, B. K. Heltsley, R. Vogt. Section Coordinators: G. T. Bodwin, E. Eichten, A. D. Frawley, A. B. Meyer, R. E. Mitchell, V. Papadimitriou, P. Petreczky, A. A. Petrov, P. Robbe, A. Vair

Fabrication and Characterization of Surfaces Modified with Carboxymethylthio Ligands for Chelate Assisted Trapping of Copper

The metal ion chelating property was conferred onto silicon Si and gold Au surfaces by direct electrografting of the 4 [ carboxymethyl thio]benzenediazonium cation 4 CMTBD . Infrared spectroscopic ellipsometry showed the presence of characteristic phenyl and carbonyl vibrational bands on the functionalized surfaces as a proof of existence of surface bound organic units of 4 [ carboxymethyl thio]benzene, 4 CMTB . The loss of diazonium group upon electrografting of 4 CMTBD was investigated using IR spectroscopy. A Faradaic efficiency of about 18.8 amp; 8722;20.0 was realized in mass deposition experiments for grafting 4 CMTB on the Au surface using an electrochemical quartz crystal microbalance technique. Raman spectroscopy performed on the Si amp; 8722; 4 CMTB surface after treatment with copper Cu ion solution provided evidence of metal ion chelation based on an observed v Cu amp; 8722;O peak at about 487 cm amp; 8722;1 and a v Cu amp; 8722;S signal at about 267 cm amp; 8722;1. The binding of Cu ions by the chelating ligands also caused a red shift of about 10 cm amp; 8722;1 in the Raman spectrum of the Si amp; 8722; 4 MTB amp; 8722;Cu surface within the spectral region, characteristic of the v C amp; 8722;O signal. X ray photoelectron spectroscopy investigations showed indications of the Cu II ion species chelated by the surface bound carboxymethylthio ligands. The functionalized surface, Si amp; 8722; 4 CMTB , constitutes an alternative metal ion chelating surface that may potentially be developed for applications in trace level trapping of Cu ion

Publishers Note Formerly Functionalization of gold and graphene electrodes by p maleimido phenyl towards thiol sensing systems investigated by EQCM and IR ellipsometric spectroscopy

Electrografting of gold and graphene surfaces by functional p N maleimido phenyl groups was performed by reduction of p N maleimido phenyldiazonium tetrafluoroborate. The reduction was carried out using cyclo voltammetry coupled with micro gravimetric measurements by means of electrochemical quartz crystal microbalance EQCM . The overall deposited mass on gold was higher than on graphene. However, the Faradaic efficiency was lower on Au 14 compared to graphene 22 after the first potential scan. Subsequently, the maleimide functional groups have been tested for immobilization of terminal thiols using 2 4 nitrobenzene ethane thiol for the functionalized graphene surface and a cysteine modified peptide for the functionalized gold surface. The functionalization by p N maleimido phenyl groups and the following thiol coupling of the particular surface was proven by infrared spectroscopic ellipsometry IRSE . In addition, the interaction of the tetrabutylammonium and tetrafluoroborate ions present in the electrolyte with the Au and graphene electrodes was investigated by EQCM and revealed less electrostatic interaction of graphene with these ions in solution compared to the metal Au surfac

Functionalization of gold and graphene electrodes by p-maleimido-phenyl towards thiol-sensing systems investigated by EQCM and IR ellipsometric spectroscopy

Electrografting of gold and graphene surfaces by functional p-(N-maleimido)phenyl groups was performed by reduction of p-(N-maleimido)phenyldiazonium tetrafluoroborate. The reduction was carried out using cyclic voltammetry coupled with micro-gravimetric measurements by means of electrochemical quartz crystal microbalance (EQCM). The overall deposited mass on gold was higher than on graphene. However, the Faradaic efficiency was lower on Au (14%) compared to graphene (22%) after the first potential scan. Subsequently, the maleimide functional groups have been tested for immobilization of terminal thiols using (4-nitrobenzyl)mercaptan for the functionalized graphene surface and a cysteine-modified peptide for the functionalized gold surface. The functionalization by p-(N-maleimido)phenyl groups and the following thiol coupling of the particular surface was proven by infrared spectroscopic ellipsometry (IRSE). In addition, the interaction of the tetrabutylammonium and tetrafluoroborate ions present in the electrolyte with the Au and graphene electrodes was investigated by EQCM and revealed less electrostatic interaction of graphene with these ions in solution compared to the metal (Au) surface

Investigating the value of information sharing in multi-echelon supply chains

Supply chain management, Multi-echelon, Information sharing, Simulation, Data envelopment analysis,