428 research outputs found
Inclusive determination of |V<inf>cb</inf>| using a new method
No full textThe precise determination of the CKM matrix element |Vcb| is important to test the unitarity of the CKM matrix and to search for loop-level new physics effects. We present a new method for the determination of |Vcb| using q2 moments from B ? Xcl?¯l decays. With new experimental input it will be possible to determine the non-perturbative hadronic matrix elements entering the total semileptonic B ? Xcl?¯l rate in the heavy-quark expansion. Exploiting reparametrization invariance, the number of these parameters can be reduced to 8 at O(1/m4b). This method allows for the simultaneous determination of these parameters and |Vcb|, taking into account also the theoretical uncertainties from missing higher order contributions in the heavy quark expansion and corrections from the strong interaction
Inclusive determination of |V<inf>cb</inf>| using a new method
No full textThe precise determination of the CKM matrix element |Vcb| is important to test the unitarity of the CKM matrix and to search for loop-level new physics effects. We present a new method for the determination of |Vcb| using q2 moments from B ? Xcl?¯l decays. With new experimental input it will be possible to determine the non-perturbative hadronic matrix elements entering the total semileptonic B ? Xcl?¯l rate in the heavy-quark expansion. Exploiting reparametrization invariance, the number of these parameters can be reduced to 8 at O(1/m4b). This method allows for the simultaneous determination of these parameters and |Vcb|, taking into account also the theoretical uncertainties from missing higher order contributions in the heavy quark expansion and corrections from the strong interaction
PLANCK 2013 cosmological results
No full textOn behalf of the Planck CollaborationInternational audienceThe Planck collaboration released last year CMB temperature anisotropies observations from data taken during the nominal duration of the mission. From high resolution sky maps in 9 frequency bands, we derived constraints on parameters of the Lambda-CMD model and its extensions. This talk will give an overview of the main results presented, and prospects for improvements with the 2014 Planck data release
PLANCK 2013 cosmological results
No full textOn behalf of the Planck CollaborationInternational audienceThe Planck collaboration released last year CMB temperature anisotropies observations from data taken during the nominal duration of the mission. From high resolution sky maps in 9 frequency bands, we derived constraints on parameters of the Lambda-CMD model and its extensions. This talk will give an overview of the main results presented, and prospects for improvements with the 2014 Planck data release
Measurement of the electron neutrino charged-current interaction rate on water with the T2K ND280 pi(0) detector
No full text10 pages, 6 figures, Submitted to PRDhttp://journals.aps.org/prd/abstract/10.1103/PhysRevD.91.112010© 2015 American Physical Society11 pages, 6 figures, as accepted to PRD11 pages, 6 figures, as accepted to PRD11 pages, 6 figures, as accepted to PR
Recent Borexino results and prospects for the near future
No full textThe Borexino experiment, located in the Gran Sasso National Laboratory, is an organic liquid scintillator detector conceived for the real time spectroscopy of low energy solar neutrinos. The data taking campaign phase I (2007 - 2010) has allowed the first independent measurements of 7Be, 8B and pep fluxes as well as the first measurement of anti-neutrinos from the earth. After a purification of the scintillator, Borexino is now in phase II since 2011. We review here the recent results achieved during 2013, concerning the seasonal modulation in the 7Be signal, the study of cosmogenic backgrounds and the updated measurement of geo-neutrinos. We also review the upcoming measurements from phase II data (pp, pep, CNO) and the project SOX devoted to the study of sterile neutrinos via the use of a 51Cr neutrino source and a 144Ce-144Pr antineutrino source placed in close proximity of the active material
Search for short baseline nu(e) disappearance with the T2K near detector
No full text8 pages, 6 figures, submitted to PRD rapid communication8 pages, 6 figures, submitted to PRD rapid communicationWe thank the J-PARC staff for superb accelerator performance and the CERN NA61 collaboration for providing valuable particle production data. We acknowledge the support of MEXT, Japan; NSERC, NRC and CFI, Canada; Commissariat `a l’Energie Atomique and Centre National de la Recherche Scientifique–Institut National de Physique Nucle´aire et de Physique des Particules, France; DFG, Germany; INFN, Italy; National Science Centre (NCN), Poland; Russian Science Foundation, RFBR and Ministry of Education and Science, Russia; MINECO and European Regional Development Fund, Spain; Swiss National Science Foundation and State Secretariat for Education, Research and Innovation, Switzerland; STFC, UK; and DOE, USA. We also thank CERN for the UA1/NOMAD magnet, DESY for the HERA-B magnet mover system, NII for SINET4, the WestGrid and SciNet consortia in Compute Canada, GridPP, UK. In addition participation of individual researchers and institutions has been further supported by funds from ERC (FP7), EU; JSPS, Japan; Royal Society, UK; DOE Early Career program, USA
Measurements of π±, K±, p and p¯spectra in 7Be+9Be collisions at beam momenta from 19A to 150A GeV/cwith the NA61/SHINE spectrometer at the CERN SPS
No full textA. Acharya, H. Adhikary, A. Aduszkiewicz, K. K. Allison, E. V. Andronov, T. Antićić, V. Babkin, M. Baszczyk, S. Bhosale, A. Blondel, M. Bogomilov, A. Brandin, A. Bravar, W. Bryliński, J. Brzychczyk, M. Buryakov, O. Busygina, A. Bzdak, H. Cherif, M. Ćirković, M. Csanad , J. Cybowska, T. Czopowicz, A. Damyanova, N. Davis, M. Deliyergiyev, M. Deveaux, A. Dmitriev , W. Dominik, P. Dorosz, J. Dumarchez, R. Engel, G. A. Feofilov, L. Fields, Z. Fodor, A. Garibov, M. Gaździcki, O. Golosov, V. Golovatyuk , M. Golubeva, K. Grebieszkow, F. Guber, A. Haesler, S. N. Igolkin, S. Ilieva, A. Ivashkin, S. R. Johnson, K. Kadija, N. Kargin, E. Kashirin, M. Kiełbowicz, V. A. Kireyeu, V. Klochkov, V. I. Kolesnikov, D. Kolev, A. Korzenev, V. N. Kovalenko, M. Koziel, B. Kozłowski, A. Krasnoperov, W. Kucewicz, M. Kuich, A. Kurepin, D. Larsen, A. László, T. V. Lazareva, M. Lewicki, K. Łojek, V. V. Lyubushkin, M. Maćkowiak-Pawłowska, Z. Majka, B. Maksiak, A. I. Malakhov, A. Marcinek, A. D. Marino, K. Marton, H. -J. Mathes, T. Matulewicz, V. Matveev, G. L. Melkumov, A. O. Merzlaya, B. Messerly, Ł. Mik, S. Morozov, S. Mrówczyński, Y. Nagai, M. Naskręt, V. Ozvenchuk, V. Paolone, O. Petukhov, R. Płaneta, P. Podlaski, B. A. Popov, B. Porfy, M. Posiadała-Zezula, D. S. Prokhorova, D. Pszczel, J. Puzović, M. Ravonel, R. Renfordt, D. Röhrich, E. Rondio, M. Roth, B. T. Rumberger, M. Rumyantsev, A. Rustamov, M. Rybczynski, A. Rybicki, S. Sadhu, A. Sadovsky, I. Selyuzhenkov, A. Yu. Seryakov, P. Seyboth, M. Słodkowski, P. Staszel, G. Stefanek, J. Stepaniak, M. Strikhanov, H. Ströbele, T. Šuša, A. Taranenko, A. Tefelska, D. Tefelski, V. Tereshchenko, A. Toia, R. Tsenov, L. Turko, R. Ulrich, M. Unger, D. Uzhva, F. F. Valiev, D. Veberič, V. V. Vechernin, A. Wickremasinghe, Z. Włodarczyk, O. Wyszyński, E. D. Zimmerman, R. ZwaskaThe NA61/SHINE experiment at the CERN
Super Proton Synchrotron (SPS) studies the onset of deconfinement
in hadron matter by a scan of particle production
in collisions of nuclei with various sizes at a set of energies
covering the SPS energy range. This paper presents results
on inclusive double-differential spectra, transverse momentum
and rapidity distributions and mean multiplicities of π
±,
K±, p and ¯ p produced in the 20% most central 7Be+9Be
collisions at beam momenta of 19A, 30A, 40A, 75A and
150A GeV/c. The energy dependence of the K±/π
± ratios
as well as of inverse slope parameters of the K± transverse
mass distributions are close to those found in inelastic p+p
reactions. The new results are compared to the world data
on p+p and Pb+Pb collisions as well as to predictions of the
Epos, Urqmd, Ampt, Phsd and Smash models
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