Measurement of CNGS muon neutrino speed with Borexino

We have measured the speed of muon neutrinos with the Borexino detector using short-bunch CNGS beams. The final result for the difference in time-of-flight between a =17 GeV muon neutrino and a particle moving at the speed of light in vacuum is {\delta}t = 0.8 \pm 0.7stat \pm 2.9sys ns, well consistent with zero.Comment: 6 pages, 5 figure

Measurement of the nuclear multiplicity ratio for Ks0K^0_s hadronization at CLAS

The influence of cold nuclear matter on lepto-production of hadrons in semi-inclusive deep inelastic scattering is measured using the CLAS detector in Hall B at Jefferson Lab and a 5.014 GeV electron beam. We report the $K_s^0$ multiplicity ratios for targets of C, Fe, and Pb relative to deuterium as a function of the fractional virtual photon energy $z$ transferred to the $K_s^0$ and the transverse momentum squared $p_{T}^2$ of the $K_s^0$. We find that the multiplicity ratios for $K^0_s$ are reduced in the nuclear medium at high $z$ and low $p_{T}^2$, with a trend for the $K^0_s$ transverse momentum to be broadened in the nucleus for large $p_{T}^2$.Comment: Submitted to Phys. Lett.

Precise Measurements of Beam Spin Asymmetries in Semi-Inclusive π0\pi^0 production

We present studies of single-spin asymmetries for neutral pion electroproduction in semi-inclusive deep-inelastic scattering of 5.776 GeV polarized electrons from an unpolarized hydrogen target, using the CEBAF Large Acceptance Spectrometer (CLAS) at the Thomas Jefferson National Accelerator Facility. A substantial $\sin \phi_h$ amplitude has been measured in the distribution of the cross section asymmetry as a function of the azimuthal angle $\phi_h$ of the produced neutral pion. The dependence of this amplitude on Bjorken $x$ and on the pion transverse momentum is extracted with significantly higher precision than previous data and is compared to model calculations.Comment: to be submitted PL

Absence of day-night asymmetry of 862 keV Be-7 solar neutrino rate in Borexino and MSW oscillation parameters

We report on a search for the day-night asymmetry of the Be-7 solar neutrino rate measured by Borexino at the Laboratori Nazionali del Gran Sasso (LNGS), Italy. The measured value, Adn=0.001 +- 0.012 (stat) +- 0.007 (syst), shows the absence of a significant asymmetry. This result alone rejects the so-called LOW solution at more than 8.5 sigma. Combined with the other solar neutrino data, it isolates the Large Mixing Angle (LMA) -- MSW solution at DeltaChi2 > 190 without relying on the assumption of CPT symmetry in the neutrino sector. We also show that including the day-night asymmetry, data from Borexino alone restricts the MSW neutrino oscillations to the LMA solution at 90% confidence level.Comment: 5 figures, published on Phys. Lett

Evidence for the Onset of Color Transparency in ρ0\rho^0 Electroproduction off Nuclei

We have measured the nuclear transparency of the incoherent diffractive $A(e,e'\rho^0)$ process in $^{12}$C and $^{56}$Fe targets relative to $^2$H using a 5 GeV electron beam. The nuclear transparency, the ratio of the produced $\rho^0$'s on a nucleus relative to deuterium, which is sensitive to $\rho A$ interaction, was studied as function of the coherence length ($l_c$), a lifetime of the hadronic fluctuation of the virtual photon, and the four-momentum transfer squared ($Q^2$). While the transparency for both $^{12}$C and $^{56}$Fe showed no $l_c$ dependence, a significant $Q^2$ dependence was measured, which is consistent with calculations that included the color transparency effects.Comment: 6 pages and 4 figure

Five-Year Outcomes of Ultrathin Descemet Stripping Automated Endothelial Keratoplasty.

PURPOSE: To report 5-year outcomes of ultrathin Descemet stripping automated endothelial keratoplasty (UT-DSAEK) with a central graft thickness intended to be <100 μm. METHODS: This retrospective, consecutive, interventional case series included 354 eyes with endothelial decompensation due to various causes (Fuchs endothelial dystrophy, pseudophakic or aphakic bullous keratopathy, failed previous graft, herpetic endothelitis, or buphthalmos). Donor tissue was prepared using the microkeratome-assisted double-pass technique aiming at a graft thickness <100 μm. The Descemet membrane was stripped under air. The graft was delivered into the anterior chamber using the pull-through technique through a 3.2-mm clear corneal incision using a modified Busin glide. The best spectacle-corrected visual acuity (BSCVA), endothelial cell loss, graft survival rates, and immunologic rejection rates were evaluated. RESULTS: Follow-up data at 1, 2, 3, and 5 years after UT-DSAEK were collected from 214, 172, 147, and 105 eyes, respectively. After excluding eyes with comorbidities, BSCVA better than or equal to  20/20 was recorded in 36.3%, 37.4%, 46.4%, and 53.4% of eyes, respectively, whereas BSCVA better than or equal to 20/40 was documented in 95.5%, 95.3%, 96.0%, and 96.6% of eyes, respectively. The mean endothelial cell loss was 35.4%, 42.3%, 43.3%, and 52.3%; Kaplan-Meier graft survival probability was 99.1%, 96.2%, 94.2%, and 94.2%, and Kaplan-Meier cumulative probability of a rejection episode was 3.4%, 4.3%, 5%, and 6.9% at 1, 2, 3, and 5 years, respectively. CONCLUSIONS: UT-DSAEK grafts allow excellent 5-year outcomes, including BSCVA, endothelial cell density, and survival rates comparable with those recorded post-Descemet membrane endothelial keratoplasty, but with a higher immunologic rejection rate

Neutrinos from the sun and from radioactive sources

none90A. Ianni;G. Bellini;J. Benziger;D. Bick;G. Bonfini;D. Bravo;M. Buizza Avanzini;B. Caccianiga;L. Cadonati;F. Calaprice;C. Carraro;P. Cavalcante;A. Chavarria;D. DʼAngelo;S. Davini;A. Derbin;A. Etenko;D. Franco;K. Fomenko;C. Galbiati;S. Gazzana;C. Ghiano;M. Giammarchi;M. Göger-Neff;A. Goretti;L. Grandi;E. Guardincerri;S. Hardy;Andrea Ianni;A. Kayunov;V. Kobychev;D. Korablev;G. Korga;Y. Koshio;D. Kryn;M. Laubenstein;T. Lewke;E. Litvinovich;L. Ludhova;B. Loer;F. Lombardi;P. Lombardi;I. Machulin;S. Manecki;W. Maneschg;G. Manuzio;Q. Meindl;E. Meroni;L. Miramonti;M. Misiaszek;D. Montanari;P. Mosteiro;V. Muratova;L. Oberauer;M. Obolensky;F. Ortica;K. Otis;M. Pallavicini;L. Papp;L. Perasso;S. Perasso;A. Pocar;R.S. Raghavan;G. Ranucci;A. Razeto;A. Re;P.A. Romani;A. Sabelnikov;R. Saldanha;C. Salvo;S. Schönert;H. Simgen;M. Skorokhvatov;O. Smirnov;A. Sotnikov;S. Sukhotin;Y. Suvorov;R. Tartaglia;G. Testera;D. Vignaud;R.B. Vogelaar;F. Von Feilitzsch;J. Winter;M. Wojcik;A. Wright;M. Wurm;J. Xu;O. Zaimidoroga;S. Zavatarelli;G. ZuzelA., Ianni; G., Bellini; J., Benziger; D., Bick; G., Bonfini; D., Bravo; M., Buizza Avanzini; B., Caccianiga; L., Cadonati; F., Calaprice; Carraro, Carlo; P., Cavalcante; A., Chavarria; D., Dʼangelo; Davini, Stefano; A., Derbin; A., Etenko; D., Franco; K., Fomenko; C., Galbiati; S., Gazzana; C., Ghiano; M., Giammarchi; M., Göger Neff; A., Goretti; L., Grandi; E., Guardincerri; S., Hardy; Andrea, Ianni; A., Kayunov; V., Kobychev; D., Korablev; G., Korga; Y., Koshio; D., Kryn; M., Laubenstein; T., Lewke; E., Litvinovich; L., Ludhova; B., Loer; F., Lombardi; P., Lombardi; I., Machulin; S., Manecki; W., Maneschg; Manuzio, Giulio; Q., Meindl; E., Meroni; L., Miramonti; M., Misiaszek; D., Montanari; P., Mosteiro; V., Muratova; L., Oberauer; M., Obolensky; F., Ortica; K., Otis; Pallavicini, Marco; L., Papp; L., Perasso; S., Perasso; A., Pocar; R. S., Raghavan; G., Ranucci; A., Razeto; A., Re; P. A., Romani; A., Sabelnikov; R., Saldanha; C., Salvo; S., Schönert; H., Simgen; M., Skorokhvatov; O., Smirnov; A., Sotnikov; S., Sukhotin; Y., Suvorov; R., Tartaglia; G., Testera; D., Vignaud; R. B., Vogelaar; F., Von Feilitzsch; J., Winter; M., Wojcik; A., Wright; M., Wurm; J., Xu; O., Zaimidoroga; S., Zavatarelli; G., Zuze

Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC

The article is the pre-print version of the final publishing paper that is available from the link below.Results are presented from searches for the standard model Higgs boson in proton–proton collisions At √s = 7 and 8 TeV in the Compact Muon Solenoid experiment at the LHC, using data samples corresponding to integrated luminosities of up to 5.1 fb−1 at 7TeV and 5.3 fb−1 at 8 TeV. The search is performed in five decay modes: γγ, ZZ, W+W−, τ+τ−, and bb. An excess of events is observed above the expected background, with a local significance of 5.0 standard deviations, at a mass near 125 GeV, signalling the production of a new particle. The expected significance for a standard model Higgs boson of that mass is 5.8 standard deviations. The excess is most significant in the two decay modes with the best mass resolution, γγ and ZZ; a fit to these signals gives a mass of 125.3±0.4(stat.)±0.5(syst.) GeV. The decay to two photons indicates that the new particle is a boson with spin different from one