529 research outputs found
8th March 2011 - Polish Under Secretary of State, Ministry of Science and Higher Education M. Banach signing the guest book with CERN Director-General R. Heuer and Head of International Relations F. Pauss.
No full text01-017: visiting SM 18 with Technology Department A. Siemko and Directorate Office E. Rondio 43-64: visiting the exhibition to celebrate the 100th anniversary of the Nobel Prize in Chemistry awarded to Maria Sklodowska-Curie 65-74:in the ATLAS visitor centre with M. Turala, Institute of Nuclear Physics PAN, Krakow and ATLAs Collaboration
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
Measurement of the decay rate
No full textThe decay rate of the neutral long-lived meson into the final state has been measured with the NA48 detector at the CERN SPS. Using data collected in 1999, a total of 132 events has been observed with negligible background. The total number of kaons was determined to be . This observation corresponds to a preliminary branching ratio of , where the first error is statistical, the second systematic, and the third error is due to the uncertainty in the normalization.The decay rate of the long-lived neutral meson into the final state has been measured with the NA48 detector at the CERN SPS. Using data collected in 1998 and 1999, a total of 200 events has been observed with negligible background. This observation corresponds to a branching ratio of Br(.The decay rate of the long-lived neutral K meson into the e+e−e+e− final state has been measured with the NA48 detector at the CERN SPS. Using data collected in 1998 and 1999, a total of 200 events has been observed with negligible background. This observation corresponds to a branching ratio of Br(KL→e+e−e+e−)=(3.30±0.24stat±0.23syst±0.10norm)×10−8 .The decay rate of the neutral long-lived K meson into the e+ e- e+ e- final state has been measured with the NA48 detector at the CERN SPS. Using data collected in 1999, a total of 132 events has been observed with negligible background. The total number of kaons was determined to be 5.1 x 10^10. This observation corresponds to a preliminary branching ratio of Gamma(K_L -> e+ e- e+ e-)/Gamma(K_L -> all) = (3.67 +- 0.32(stat) +- 0.23(sys) +- 0.08(norm)) x 10^-8, where the first error is statistical, the second systematic, and the third error is due to the uncertainty in the normalization
Measurement of the K-L -> e(+)e(-)e(+)e(-) decay rate
No full textThe decay rate of the long-lived neutral K meson into the e(+)e(-)e(+)e(-) final state has been measured with the NA48 detector at the CERN SPS. Using data collected in 1998 and 1999, a total of 200 events has been observed with negligible background. This observation corresponds to a branching ratio of Br(K-L -> e(+)e(-)e(+)e(-)) = (3.30 +/- 0.24(stat)+/- 0.23(syst)+/- 0-10(norm)) x 10(-8). (c) 2005 Elsevier B.V. All rights reserved
Observation of the decay K-S -> pi(+)pi(-)e(+)e(-)
No full textWe present the first observation of the decay K-S -> pi (+)pi (-)e(+)e(-) based upon the data collected in 1998 by the NA48 experiment at CERN. We have identified a clean sample of 56 events with negligible background contamination. Using K-L -> pi (+)pi (-)pi (0)(D) decays as normalization sample, the branching ratio is measured to be BR(K-S -> pi (+)pi (-)e(+)e(-)) = [4.5 +/- 0.7(stat) +/- 0.4(syst)] x 10(-5). This result is in good agreement with the theoretical expectations from the mechanism of inner bremsstrahlung. (C) 2000 Elsevier Science B.V. All rights reserved
Investigation of K-L,K-s -> pi(+)pi(-)e(+)e(-) decays
No full textThe and decay modes have been studied in detail using the NA48 detector at CERN SPS. Based on the data collected during the 1998 and 1999 run periods, a sample of 1162 candidates has been observed with an expected background level of 36.9 events, yielding the branching ratio measurement . The distribution of events in the sincos variable, where is the angle between the and the decay planes in the kaon centre of mass, is found to exhibit a large CP-violating asymmetry with the value %. For the decay channel, 621 candidates have been identified in the 1999 data sample with an estimated background contribution of 0.7 event. The corresponding branching ratio has been determined to be . The combined value of this measurement with the published 1998 result is . No asymmetry is observed in this decay mode. Our results are in good agreement with theoretical predictions based on a phenomenological description of radiative kaon decays. The form factor parameters a/a and in the direct emission process as well as the value of the charge radius have been extracted from the data
Search for the decay K-s -> pi(0)e(+)e(-)
No full textA search for the decay has been made using the NA48 detector at the CERN SPS. Using data collected in 1999 during a 40-hour run with a high-intensity beam, an upper limit for the branching fraction at 90\% confidence level has been obtained
23 February 2010 - Polish Under Secretary of State, Ministry of Science and Higher Education, J. Szwed visiting CERN installations with sLHC Project Office T. Kurtyka and Machine Protection and Electrical Integrity Group Leader A. Siemko.
No full textTirage 1002023-01: In LHCb experimental area with Machine Protection and Electrical Integrity Group Leader A. Siemko; Mission Counselor M. Cichucka; Counselor to the Minister M. Klimkiewicz, Under Secretary of State J. Szwed; LHCb Collaboration, national group leader, Henryk Niewodniczanski Institut of Nuclear Physics G. Polok, Collaboration Spokesperson A. Golutvin and Delegate to CERN Council A. Zalewska. Tirage 28: Visiting the Computing Centre with IT Department Head F. Hemmer Tirage 49: In CMS Control centre, buiding 354 with Collaboration Spokesperson G. Tonelli and CMS Collaboration, national group leader, University of Warsaw J. Krolikowski. Tirage 62: visiting ALICE exhibition area and counting room with Collaboration Spokesperson J. Schukraft. Tirage 82-99: Under Secretary of State address to the Polish Community Tirage 82: Machine Protection and Electrical Integrity Group Leader A. Siemko Tirage 83: Polish Delegate to CERN Council A. Zalewska. Tirage 85: Directorate Office E. Rondio Tirage 86: ATLAS Collaboration, AGH University of Science and Technology D. Kisielewska Tirage 87: LHCb Collaboration, national group leader, Henryk Niewodniczanski Institut of Nuclear Physics G. Polok Tirage 88: sLHC Project Office T. Kurtyk
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
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