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RELATIVE COMPOSITION AND ENERGY SPECTRA OF LIGHT NUCLEI IN COSMIC RAYS: RESULTS FROM AMS-01
Aguilar, M.,Alcaraz, J.,Allaby, J.,Alpat, B.,Ambrosi, G.,Anderhub, H.,Ao, L.,Arefiev, A.,Arruda, L.,Azzarello, P.,Basile, M.,Barao, F.,Barreira, G.,Bartoloni, A.,Battiston, R.,Becker, R.,Becker, U.,Be IOP Publishing 2010 The Astrophysical journal Vol.724 No.1
ISOTOPIC COMPOSITION OF LIGHT NUCLEI IN COSMIC RAYS: RESULTS FROM AMS-01
Aguilar, M.,Alcaraz, J.,Allaby, J.,Alpat, B.,Ambrosi, G.,Anderhub, H.,Ao, L.,Arefiev, A.,Arruda, L.,Azzarello, P.,Basile, M.,Barao, F.,Barreira, G.,Bartoloni, A.,Battiston, R.,Becker, R.,Becker, U.,Be IOP Publishing 2011 The Astrophysical journal Vol.736 No.2
<P>The variety of isotopes in cosmic rays allows us to study different aspects of the processes that cosmic rays undergo between the time they are produced and the time of their arrival in the heliosphere. In this paper, we present measurements of the isotopic ratios H-2/He-4, He-3/He-4, Li-6/Li-7, Be-7/(Be-9+Be-10), and B-10/B-11 in the range 0.2-1.4 GeV of kinetic energy per nucleon. The measurements are based on the data collected by the Alpha Magnetic Spectrometer, AMS-01, during the STS-91 flight in 1998 June.</P>
A search for flaring very-high-energy cosmic γ-ray sources with the L3+C muon spectrometer
Achard, P.,Adriani, O.,Aguilar-Benitez, M.,van den Akker, M.,Alcaraz, J.,Alemanni, G.,Allaby, J.,Aloisio, A.,Alviggi, M.G.,Anderhub, H.,Andreev, V.P.,Anselmo, F.,Arefiev, A.,Azemoon, T.,Aziz, T.,Bagna Elsevier 2006 Astroparticle physics Vol.25 No.5
<P><B>Abstract</B></P><P>The L3+C muon detector at the CERN electron–positron collider, LEP, is used for the detection of very-high-energy cosmic γ-ray sources through the observation of muons of energies above 20, 30, 50 and 100GeV. Daily or monthly excesses in the rate of single-muon events pointing to some particular direction in the sky are searched for. The periods from mid July to November 1999, and April to November 2000 are considered. Special attention is also given to a selection of known γ-ray sources. No statistically significant excess is observed for any direction or any particular source.</P>
Achard, P.,Adriani, O.,Aguilar-Benitez, M.,van den Akker, M.,Alcaraz, J.,Alemanni, G.,Allaby, J.,Aloisio, A.,Alviggi, M.G.,Anderhub, H.,Andreev, V.P.,Anselmo, F.,Arefiev, A.,Azemoon, T.,Aziz, T.,Bagna Elsevier 2005 Astroparticle physics Vol.23 No.4
<P><B>Abstract</B></P><P>The shadowing of high-energy cosmic rays by the Moon has been observed with a significance of 9.4 standard deviations with the L3+C muon spectrometer at CERN. A significant effect of the Earth magnetic field is observed. Since no event deficit on the east side of the Moon has been observed, an upper limit at 90% confidence level on the antiproton to proton ratio of 0.11 is obtained for primary energies around 1TeV.</P>
( Palao J. M. ),( Garcia-de-alcaraz A. ),( Hernandez-hernandez E. ),( Ortega E. ) 한국스포츠정책과학원(구 한국스포츠개발원) 2016 International Journal of Applied Sports Sciences Vol.28 No.2
The purpose of this study was to test a protocol for establishing collective technical and tactical performance goals in elite men`s volleyball. The participants were a professional volleyball team. The period of study was one entire season. A baseline was established in the first half of the season, and the intervention was carried out in the second half of the season. The intervention involved the use of seven collective performance goals for monitoring the team in competitions. The variables studied were: the achievement of the collective performance goals that were established; the game phase; the result of the set; and the players`, coaches`, and psychologist`s perception of the use of the performance goals and the poster. The team slightly increased the number of goals achieved per game in the intervention period. There was a significant reduction in serve errors and a significant increase in block contacts. The intervention increased the players` engagement with the team, although there were differences in opinion about the effect on the different players. The intervention improved the players` understanding of the match. The effects of the goal-setting and the poster were positively perceived, due to helping the players to understand their needs and the aspects to improve.
Cosmic-ray positron fraction measurement from 1 to 30 GeV with AMS-01
AMS-01 Collaboration,Aguilar, M.,Alcaraz, J.,Allaby, J.,Alpat, B.,Ambrosi, G.,Anderhub, H.,Ao, L.,Arefiev, A.,Azzarello, P.,Baldini, L.,Basile, M.,Barancourt, D.,Barao, F.,Barbier, G.,Barreira, G.,Bat North-Holland Pub. Co 2007 Physics letters: B Vol.646 No.4
A measurement of the cosmic ray positron fraction e<SUP>+</SUP>/(e<SUP>+</SUP>+e<SUP>-</SUP>) in the energy range of 1-30 GeV is presented. The measurement is based on data taken by the AMS-01 experiment during its 10 day Space Shuttle flight in June 1998. A proton background suppression on the order of 10<SUP>6</SUP> is reached by identifying converted bremsstrahlung photons emitted from positrons.
Compton scattering of quasi-real virtual photons at LEP
Achard, P.,Adriani, O.,Aguilar-Benitez, M.,Alcaraz, J.,Alemanni, G.,Allaby, J.,Aloisio, A.,Alviggi, M.G.,Anderhub, H.,Andreev, V.P.,Anselmo, F.,Arefiev, A.,Azemoon, T.,Aziz, T.,Bagnaia, P.,Bajo, A.,Ba Elsevier 2005 Physics letters: B Vol.616 No.3
<P><B>Abstract</B></P><P>Compton scattering of quasi-real virtual photons, γ<SUP>e±</SUP>→γ<SUP>e±</SUP>, is studied with 0.6 fb<SUP>−1</SUP> of data collected by the L3 detector at the LEP <SUP>e+</SUP><SUP>e−</SUP> collider at centre-of-mass energies s=189–209 GeV. About 4500 events produced by the interaction of virtual photons emitted by <SUP>e±</SUP> of one beam with <SUP>e∓</SUP> of the opposite beam are collected for effective centre-of-mass energies of the photon–electron and photon–positron systems in the range from <SUP>s′</SUP>=35 GeV up to <SUP>s′</SUP>=175 GeV, the highest energy at which Compton scattering was ever probed. The cross sections of the γ<SUP>e±</SUP>→γ<SUP>e±</SUP> process as a function of <SUP>s′</SUP> and of the rest-frame scattering angle are measured, combined with previous L3 measurements down to <SUP>s′</SUP>≃20 GeV, and found to agree with the QED expectations.</P>
Z-boson production with two unobserved, back-to-back, hard photons at LEP
Achard, P.,Adriani, O.,Aguilar-Benitez, M.,Alcaraz, J.,Alemanni, G.,Allaby, J.,Aloisio, A.,Alviggi, M.G.,Anderhub, H.,Andreev, V.P.,Anselmo, F.,Arefiev, A.,Azemoon, T.,Aziz, T.,Bagnaia, P.,Bajo, A.,Ba Elsevier 2005 Physics letters: B Vol.613 No.3
<P><B>Abstract</B></P><P>The double-radiative process <SUP>e+</SUP><SUP>e−</SUP>→Zγγ→qq¯γγ where the two hard photons escape detection at low polar angles into opposite directions, is studied in 0.62 fb<SUP>−1</SUP> of data collected with the L3 detector at LEP at centre-of-mass energies between 188.6 and 209.2 GeV. The cross sections are measured and found to be consistent with the Standard Model expectations.</P>
Search for an invisibly-decaying Higgs boson at LEP
Achard, P.,Adriani, O.,Aguilar-Benitez, M.,Alcaraz, J.,Alemanni, G.,Allaby, J.,Aloisio, A.,Alviggi, M.G.,Anderhub, H.,Andreev, V.P.,Anselmo, F.,Arefiev, A.,Azemoon, T.,Aziz, T.,Bagnaia, P.,Bajo, A.,Ba Elsevier 2005 Physics letters: B Vol.609 No.1
<P><B>Abstract</B></P><P>A search for a Higgs boson produced in <SUP>e+</SUP><SUP>e−</SUP> collisions in association with a Z boson and decaying into invisible particles is performed. Data collected at LEP with the L3 detector at centre-of-mass energies from 189 to 209 GeV are used, corresponding to an integrated luminosity of 0.63 fb<SUP>−1</SUP>. Events with hadrons, electrons or muons with visible masses compatible with a Z boson and missing energy and momentum are selected. They are consistent with the Standard Model expectations. A lower limit of 112.3 GeV is set at 95% confidence level on the mass of the invisibly-decaying Higgs boson in the hypothesis that its production cross section equals that of the Standard Model Higgs boson. Relaxing this hypothesis, upper limits on the production cross section are derived.</P>