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  1. No Access

    Article

    Partial widths for the decays η:(1295) →γγ and η:(1440) →γγ

    We discuss γγ partial widths of pseudoscalar/isoscalar mesons η:(M) in the mass region M∼ 1000–1500 MeV. The transition amplitudes η:(1295) →γγ and η:(1440) →γγ are studied within an assumption that the decaying...

    A.V. Anisovich, V.V. Anisovich, V.A. Nikonov… in The European Physical Journal A - Hadrons … (1999)

  2. No Access

    Article

    Evidence for two isospin zeroJ PC=2−+ mesons at 1645 and 1875 MeV

    Data on \(\bar pp \to \eta \pi ^0 \pi ^0 \pi ^0 \) taken at beam momenta of 1.2 and 1.94 GeV/c reveal evidence for t...

    J. Adomeit, C. Amsler, D. S. Armstrong… in Zeitschrift für Physik C Particles and Fie… (1996)

  3. No Access

    Article

    Meson radiative decays and anomaly physics, a test of QCD

    We discuss in a wider context the connection of the results previously obtained on the decay processes η/η′→π+π−γ with respect to the ξ test of QCD proposed by Chanowitz. We show that one can add consistently to ...

    M. Benayoun, Ph. Leruste, L. Montanet… in Zeitschrift für Physik C Particles and Fie… (1995)

  4. No Access

    Article

    First observations of Pontecorvo reactions with a recoiling neutron

    We report the first observations of Pontecorvo reactions of the type ¯pd →Xn. We fully reconstruct the outgoing meson and, for antiprotons stopped in liquid deuterium, we measure: BR(¯pd→π0)=(7.03±0.72)×10−6, BR(...

    C. Amsler, D. S. Armstrong, I. Augustin… in Zeitschrift für Physik A Hadrons and Nuclei (1995)

  5. No Access

    Article

    Antiproton annihilation at rest in liquid deuterium into π−π0π0pS

    With the Crystal Barrel detector, the final state π−π0π0pS at rest in liquid deuterium was measured for the first time. A preliminary partial-wave analysis was performed, which required two interesting features: ...

    C. Amsler, I. Augustin, C. A. Baker, B. M. Barnett… in Il Nuovo Cimento A (1965-1970) (1994)

  6. No Access

    Article

    High-statistics analysis of \(\bar pp \to \pi ^0 \pi ^0 \pi ^0 \) at restat rest

    Antiproton-proton annihilation at rest into 3π0 is analysed based on a data sample of about 500 000 high-quality 3π0 events. In this high-statistics Dalitz plot two structures in the region of π0π0 invariant mass...

    C. Amsler, I. Augustin, C. A. Baker, B. M. Barnett… in Il Nuovo Cimento A (1965-1970) (1994)

  7. No Access

    Article

    Antiproton-proton annihilation in flight

    This is an overview of the preliminary results of \(\bar pp\) annihilation at incident

    C. Amsler, D. S. Armstrong, I. Augustin, C. A. Baker… in Il Nuovo Cimento A (1965-1970) (1994)

  8. No Access

    Article

    Partial-wave analysis of ππη in \(\bar pp\) annihilation at restannihilation at rest

    A new isovector scalar πη resonance with a mass of 1450 MeV is observed in a high-statistics study of \(\bar pp\) ...

    C. Amsler, I. Augustin, C. A. Baker, B. M. Barnett… in Il Nuovo Cimento A (1965-1970) (1994)

  9. No Access

    Article

    Test of chiral perturbation theory in η decays

    The decay of the η-meson into three pions plays an important role as a test of low-energy QCD calculations in the framework of chiral perturbation theory. Previous experiments show results that are inconclusiv...

    C. Amsler, D. S. Armstrong, I. Augustin, C. A. Baker… in Il Nuovo Cimento A (1965-1970) (1994)

  10. No Access

    Article

    \(\bar pp\) Annihilation at rest into K L 0 K S 0 π0π0Annihilation at rest into K L 0 K S 0 π0π0

    Investigations of purely neutral final states in \(\bar pp\) annihilation are possible for the first time with the...

    C. Amsler, D. S. Armstrong, I. Augustin, C. A. Baker… in Il Nuovo Cimento A (1965-1970) (1994)

  11. No Access

    Article

    HADRON ’93: Experiments

    In this summary, we briefly recall what may be considered as the main new experimental results that have been presented at HADRON ’93: on proton-proton and photon-proton cross-sections, on the first HERA resul...

    L. Montanet in Il Nuovo Cimento A (1965-1970) (1994)

  12. No Access

    Article

    Hidden and open \(\bar ss\) production in \(\bar pp\) annihilation at restannihilation at rest

    New branching ratios for \(\bar pp\) annihilation at rest into final states with a

    C. Amsler, D. S. Armstrong, I. Augustin, C. A. Baker… in Il Nuovo Cimento A (1965-1970) (1994)

  13. No Access

    Article

    New results from crystal barrel

    Results are presented on meson spectroscopy, two-body final states and meson decay modes observed in \(\bar pp\) a...

    C. Amsler, D. S. Armstrong, I. Augustin, C. A. Baker… in Il Nuovo Cimento A (1965-1970) (1994)

  14. No Access

    Article

    Antiproton-proton annihilation at rest into two-body final states

    We report measurements of branching ratios for production of a series of two meson final states in \(\bar p\) p anni...

    C. Amsler, D. S. Armstrong, I. Augustin… in Zeitschrift für Physik C Particles and Fie… (1993)

  15. No Access

    Article

    Bose-Einstein correlations inpp collisions at 400 GeV/c

    Bose-Einstein correlations among identically charged pions produced inpp collisions at 400 GeV/c are studied using the EHS spectrometer. Empoying the Kopylov-Podgoretskii parametrization, the average size of the ...

    M. Aguilar-Benitez, W. W. M. Allison… in Zeitschrift für Physik C Particles and Fie… (1992)

  16. No Access

    Article

    Inclusive particle production in 400 GeV/c pp-interactions

    We report on a study of inclusive particle production in pp-interactions at 400 GeV/c. The data are based on 472 K reconstructed events recorded in the NA 27 experiment using the LEBC-EHS facility at CERN. The...

    M. Aguilar-Benitez, W. W. W. Allison… in Zeitschrift für Physik C Particles and Fie… (1991)

  17. No Access

    Article

    Experimental results on proton diffractive dissociation

    Properties of proton diffractive dissociation have been investigated for four-prong final states in proton-proton reactions at 360 GeV/c, in particular forpp→ppπ +π− mπ 0(m=0,1,2). Mass distributions and decay an...

    M. Asai, J. L. Bailly, H. Böttcher… in Zeitschrift für Physik C Particles and Fie… (1990)

  18. No Access

    Article

    Vector meson production in π− p interactions at 360 GeV/c

    The inclusive production of vector mesons (charged ρ(770), ω(783), ϕ(1020) and neutralK *(892)) in π− p interactions at 360 GeV/c is studied. The data are based on 160 000 reconstructed events recorded in the NA ...

    M. Aguilar-Benitez, J. L. Bailly… in Zeitschrift für Physik C Particles and Fie… (1989)

  19. No Access

    Article

    Bose-Einstein correlations for pions produced inp p collisions at 360 GeV/c

    Correlations among identically charged pions were measured for pions produced inp p collisions at 360 GeV/c using the EHS spectrometer. The effective radius for pion production was determined to be 1.02±0.20 fm w...

    J. L. Bailly, C. Caso, Y. Chiba, H. Dibon… in Zeitschrift für Physik C Particles and Fie… (1989)

  20. Article

    Exclusive hadron branching ratios of theD meson

    M. Aguilar-Benitez, W. W. M. Allison… in Zeitschrift für Physik C Particles and Fie… (1988)

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