33 research outputs found
The NOMAD experiment at the CERN SPS
No full textThis paper describes the detector of the NOMAD experiment at the CER SPS for the search of the neutrino(mu)-neutrino(tau) oscillation
Precision measurement of scaled momentum, charged multiplicity, and thrust in νμ and anti-νμ interactions
No full textWe report the first precision measurements of the scaled momentum, the charge multiplicity, and the thrust of hadronic
jets in the Breit frame in Deep Inelastic Scattering n N and n N charged current events over the Q2 range from 1 to 100 m m
GeV2. The neutrino data, obtained in the NOMAD experiment at the CERN SPS, extend the Q2-evolution of these parameters by two orders of magnitude, and with commensurate precision, when compared to those reported by the electron-proton and electron-positron experiments
Search for a new gauge boson in neutral pion decays
No full textA search was made for a new light gauge boson X which might be produced decay from neutral pions generated by 450 GeV protons in the CERN SPS neutrino target. The X’s would penetrate the downstream shielding and be observed in the NOMAD detector via the Primakoff effect. 20 candidate events with energy between 8 and 140 GeV were found from the analysis of neutrino data. This number is in agreement with the expectation of 18. background events from standard neutrino processes
A search for νμ → ντ oscillations using the NOMAD detector
No full textNOMAD is a neutrino oscillation experiment designed to search for neutrino-tau appearance in the CERN-SPS wide band
beam. Signal detection relies on the identification of neutrino charged current interactions using kinematic criteria. The analysis
the 1995 data sample yields no oscillation signal. Combining all studied tau decay modes, limit on the oscillation parameters are given
Evolutionary reconstruction, nomenclature and functional meta-analysis of the Kiwellin protein family.
No full textCrop diseases caused by pathogens critically affect global food security and plant ecology. Pathogens are well adapted to their host plants and have developed sophisticated mechanisms allowing successful colonization. Plants in turn have taken measures to counteract pathogen attacks resulting in an evolutionary arms race. Recent studies provided mechanistic insights into how two plant Kiwellin proteins from Zea mays mitigate the activity of the chorismate mutase Cmu1, a virulence factor secreted by the fungal pathogen Ustilago maydis during maize infection. Formerly identified as human allergens in kiwifruit, the biological function of Kiwellins is apparently linked to plant defense. We combined the analysis of proteome data with structural predictions to obtain a holistic overview of the Kiwellin protein family, that is subdivided into proteins with and without a N-terminal kissper domain. We found that Kiwellins are evolutionarily conserved in various plant species. At median five Kiwellin paralogs are encoded in each plant genome. Structural predictions revealed that Barwin-like proteins and Kiwellins cannot be discriminated purely at the sequence level. Our data shows that Kiwellins emerged in land plants (embryophyta) and are not present in fungi as suggested earlier. They evolved via three major duplication events that lead to clearly distinguishable subfamilies. We introduce a systematic Kiwellin nomenclature based on a detailed evolutionary reconstruction of this protein family. A meta-analysis of publicly available transcriptome data demonstrated that Kiwellins can be differentially regulated upon the interaction of plants with pathogens but also with symbionts. Furthermore, significant differences in Kiwellin expression levels dependent on tissues and cultivars were observed. In summary, our study sheds light on the evolution and regulation of a large protein family and provides a framework for a more detailed understanding of the molecular functions of Kiwellins. Copyright © 2022 Klemm, Christ, Altegoer, Freitag, Bange and Lechner
Study of neutrino interactions with the electronic detectors of the OPERA experiment
No full textThe OPERA experiment is based on a hybrid technology
combining electronic detectors (EDs) and nuclear emulsions. OPERA collected muon–neutrino interactions during the 2008 and 2009 physics runs of the CNGS neutrino beam, produced at CERN with an energy range of about 5–35 GeV. A total of 5.3×1019 protons on target equivalent luminosity have been analysed with the OPERA EDs: scintillator strips target trackers and magnetic muon spectrometers equipped with resistive plate gas chambers and drift tubes, allowing a detailed reconstruction of muon–neutrino interactions
Precision Measurement of Scaled Momentum, Charge Multiplicity and Thrust in
No full textWe report the first precision measurements of the scaled momentum, the charge multiplicity, and the thrust of hadronic jets in the Breit frame in Deep Inelastic Scattering N and N charged current events over the Q 2 range from 1 to 100 GeV 2 . The neutrino data, obtained in the NOMAD experiment at the CERN SPS, extend the Q 2 -evolution of these parameters by two orders of magnitude, and with commensurate precision, when compared to those reported by the ep and e + e \Gamma experiments. 1 J. Altegoer 5 C. Angelini 16 P. Astier 14 D. Autiero 8 A. Baldisseri 18 M. Baldo-Ceolin 13 G. Ballocchi 8 M. Banner 14 S. Basa 9 G. Bassompierre 1 K. Benslama 9 N. Besson 18 I. Bird 9;8 B. Blumenfeld 2 F. Bobisut 13 J. Bouchez 18 S. Boyd 19 A. Bueno 3 S. Bunyatov 6 L. Camilleri 8 A. Cardini 10 P.W. Cattaneo 15 V. Cavasinni 16 A. Cervera-Villanueva 8 G. Collazuol 13 G. Conforto 21;8 C. Conta 15 M. Contalbrigo 13 R. Cousins 10 ..
The Nomad Collaboration
No full textNOMAD is a neutrino oscillation experiment designed to search for ø appearance in the CERN-SPS wide band predominantly ¯ beam. Signal detection is based on the identification of ø charged current interactions with the help of kinematic criteria. After the completion of the detector in August, 1995 the experiment has been successfully taking data till the end of 1996. The detector performances are in good agreement with our expectations. Preliminary analysis based on the 1995 data sample allows NOMAD to achieve the limit of 4 \Theta 10 \Gamma3 on sin 2 2` ¯ø for large \Deltam 2 . NOMAD will continue to run during 1997. If no evidence for oscillations is found in all the NOMAD data the sensitivity to the oscillation parameters is expected to be improved by an order of magnitude with respect to the current limit. a Univ. of Massachusetts, Amherst, USA b LAPP, Annecy, France c Univ. of Calabria INFN, Cosenza, Italy d CERN, Geneva, Switzerland e Dortmund Univ., Dortmund, G..
First Results From The
No full textThe NOMAD experiment has been optimized to detect primary electrons with good efficiency. e charged current interactions can be analysed to search for a ¯ ! e signal: no evidence for such a signal is observed in the NOMAD data collected during 1995 run. Comparing the ratio e = ¯ of observed e and ¯ charged current interactions to expectations shows no evidence for oscillations. A preliminary limit of sin 2 2` ! 1:8 \Theta 10 \Gamma3 can be set for high \Deltam 2 . a Univ. of Massachusetts, Amherst, USA b LAPP, Annecy, France c Univ. of Calabria INFN, Cosenza, Italy d CERN, Geneva, Switzerland e Dortmund Univ., Dortmund, Germany f JINR, Dubna, Russia g Univ. of Florence INFN, Florence, Italy h Harvard Univ., Boston, USA i Johns Hopkins Univ., Baltimore, USA j University of Lausanne, Lausanne, Switzerland k UCLA, Los Angeles, USA l University of Melbourne, Melbourne, Australia m Inst. Nucl. Research, INR Moscow, Russia n Univ. of Padova INFN, Padov..
Preliminary Results from the NOMAD Neutrino Oscillation Experiment at CERN
No full textNOMAD is a short baseline neutrino oscillation experiment searching for ¯ ! ø and ¯ ! e oscillations in the CERN SPS wide band neutrino beam. The experiment has been collecting data since July 1995 and the data taking will continue until at least the end of 1997. A preliminary analysis based on the 1995 data sample allows NOMAD to set 90% confidence limits of sin 2 2` ¯ø ! 3:4 \Theta 10 \Gamma3 for ¯ ! ø and sin 2 2` ¯e ! 2 \Theta 10 \Gamma3 for ¯ ! e oscillations at large \Deltam 2 . a Univ. of Massachusetts, Amherst, USA b LAPP, Annecy, France c Univ. of Calabria INFN, Cosenza, Italy d CERN, Geneva, Switzerland e Dortmund Univ., Dortmund, Germany f JINR, Dubna, Russia g Univ. of Florence INFN, Florence, Italy h Harvard Univ., Boston, USA i Johns Hopkins Univ., Baltimore, USA j University of Lausanne, Lausanne, Switzerland k UCLA, Los Angeles, USA l University of Melbourne, Melbourne, Australia m Inst. Nucl. Research, INR Moscow, Russia n ..
