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1.
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Performance of a magnetized total absorption calorimeter between 15 GeV and 140 GeV
/ Holder, M (CERN) ; Bloch, P (Saclay) ; Devaux, B (Saclay) ; Dorth, W (Heidelberg U.) ; Dydak, F (Heidelberg U.) ; Eisele, F (Dortmund U.) ; Flottmann, T (Heidelberg U.) ; Geweniger, C (Dortmund U.) ; Grimm, M (Saclay) ; Hepp, V (Heidelberg U.) et al.
The authors have calibrated a magnetized iron-scintillator sandwich calorimeter in a hadron beam, finding an energy resolution equal to 16% fwhm at 140 GeV with 4 cm sampling. The hadron energy resolution (fwhm/mean) improves as E/sup -1/2/ between 15 and 140 GeV. [...]
Geneva : CERN, 1978 - 40 p.
- Published in : Nucl. Instrum. Methods 151 (1978) 69-80
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2.
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Opposite sign dimuon events produced in narrow band neutrino and antineutrino beams
/ Holder, M (CERN) ; Bloch, P (Saclay) ; Devaux, B (Saclay) ; Dorth, W (Heidelberg U.) ; Dydak, F (Heidelberg U.) ; Eisele, F (Dortmund U.) ; Geweniger, C (Dortmund U.) ; Grimm, M (Saclay) ; Hepp, V (Heidelberg U.) ; Kleinknecht, K (Dortmund U.) et al.
On the basis of 315 dimuon events of opposite sign for which the nature (and energy) of the incident neutrino is known, and the momenta and hadronic energy are measured, the authors find a) very similar production by neutrinos and antineutrinos, and therefore confirmation of the GIM model for semileptonic weak interactions, b) energy spectra, excitation functions, angular correlations and transverse momentum distributions which are in remarkable agreement with the hypothesis of charm production and decay, c) evidence against models for which the second muon has a heavy lepton as origin, d) evidence against 'bottom' quark production by antineutrinos, e) the amount and the structure function for the strange quark-antiquark sea, and f) an approximate branching ratio, of 0.15 for the muonic decay of the semistable charmed meson..
PRINT-77-0547-CERN.-
1977
- Published in : Phys. Lett. B 69 (1977) 377-384
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3.
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Like-sign dimuon events produced in narrow-band neutrino and antineutrino beams
/ Holder, M ; Bloch, P ; Devaux, B ; Dorth, W ; Dydak, F ; Eisele, F ; Geweniger, C ; Grimm, M ; Hepp, V ; Kleinknecht, K et al.
Forty-seven events of the type nu +Fe to mu /sup -/+ mu /sup -/+X and nine events of the type nu +Fe to mu /sup +/+ mu /sup +/+X have been observed, and zero events with like-sign muons of the opposite sign. Most of the observed events can be attributed to the background of normal charged current events, in which one of the pions or kaons of the hadron shower decays, and so produces a second muon. [...]
1977
- Published in : Phys. Lett. B 70 (1977) 396-8
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4.
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Measurement of the neutral to charged current cross section ratio in neutrino and antineutrino interactions
/ Holder, M (CERN) ; Berthelot, A (Saclay) ; Bloch, p (Saclay) ; Devaux, B (Saclay) ; Dorth, W (Heidelberg U.) ; Dydak, F (Heidelberg U.) ; Eisele, F (Dortmund U.) ; Geweniger, C (Dortmund U.) ; Grimm, M (Saclay) ; Hepp, V (Heidelberg U.) et al.
The authors report on the analysis of inclusive neutral current events produced in neutrino and antineutrino narrow band beams. One finds for incident neutrino energies in the range 12-200 GeV and for hadron energies above 12 GeV a neutral charged current cross-section ratio of R/sub nu /=0.293+or-0.010 for incident neutrinos, and R/sub anti nu /=0.35+or-0.03 for antineutrinos. [...]
PRINT-77-0746-CERN.-
1977
- Published in : Phys. Lett. B 71 (1977) 222-6
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5.
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Observation of trimuon events produced in neutrino and antineutrino interactions
/ Holder, M ; Berthelot, A ; Bloch, P ; Devaux, B ; Dorth, W ; Dydak, F ; Eisele, F ; Geweniger, C ; Grimm, M ; Hepp, V et al.
Two trimuon events produced in nu interactions are reported. Of these, one is of the charge type -++, not previously reported. [...]
1977
- Published in : Phys. Lett. B 70 (1977) 393-5
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6.
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Study of inclusive neutral current interactions of neutrinos and antineutrinos
/ Holder, M ; Bloch, P ; Devaux, B ; Dorth, W ; Dydak, F ; Eisele, F ; Geweniger, C ; Grimm, M ; Hepp, V ; Kleinknecht, K et al.
The authors report on results from a study of hadron energy distributions for nu and nu inclusive neutral current interactions. There is no significant variation of the neutral to charged current total cross section ratios R/sub nu / and R/sub - nu / with neutrino energy. [...]
1977
- Published in : Phys. Lett. B 72 (1977) 254-60
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7.
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Is There a High-y Anomaly in Antineutrino Interactions?
/ Holder, M (CERN) ; Knobloch, J (CERN) ; May, J (CERN) ; Paar, H P (CERN) ; Palazzi, P (CERN) ; Schlatter, D (CERN) ; Steinberger, J (CERN) ; Suter, H (CERN) ; Wahl, H (CERN) ; Williams, E G H (CERN) et al.
We have analyzed data taken in the CERN narrow-band neutrino and antineutrino beams with regard to the "high-y anomaly" observed by previous experiments at Fermilab. At neutrino energies between 30 and 200 GeV, the nu -bar and nu charged-current cross-section ratios and muon-inelasticity distributions disagree with the earlier results. [...]
1977 - 10 p.
- Published in : Phys. Rev. Lett. 39 (1977) 433-436
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8.
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Prism plot analysis of the reaction $\pi^{-}p \rightarrow p\pi^{+}\pi^{-}\pi^{-}$ at 16 GeV/c
/ Grässler, Herbert ; Honecker, R ; Kirk, H G ; Klugow, J ; Nahnhauer, R ; Hartmann, R ; Zobernig, G ; Kostka, P ; Morrison, Douglas Robert Ogston ; Triantis, F A et al.
CERN-EP-PHYS-76-41.
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1976. - 26 p.
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9.
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Observation Of Trimuon Events Produced In Neutrino And Anti-neutrino Interactions
/ Holder, M ; Knobloch, J ; May, J ; Paar, H P ; Palazzi, P ; Ranjard, F ; Schlatter, W D ; Steinberger, Jack ; Suter, H ; Wahl, H et al.
PRINT-77-0745-CERN.-
Geneva : CERN, 1977
- Published in : Phys. Lett. B 70 (1977) 393
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10.
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Study Of Inclusive Neutral Current Interactions Of Neutrinos And Anti-neutrinos
/ Holder, M (CERN) ; Knobloch, J (CERN) ; May, J (CERN) ; Paar, H P (CERN) ; Palazzi, P (CERN) ; Ranjard, F (CERN) ; Schlatter, W D (CERN) ; Steinberger, Jack (CERN) ; Suter, H (CERN) ; Wahl, H (CERN) et al.
PRINT-77-0871-CERN.-
Geneva : CERN, 1977 - 17 p.
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