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  • 1
    Electronic Resource
    Electronic Resource
    Nucleon-Nucleon Physics up to 1 GeV (1985)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Nuclear and Particle Science 35 (1985), S. 295-320 
    Details
    ISSN: 0163-8998
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.ns.35.120185.001455
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  • 2
    Electronic Resource
    Electronic Resource
    Thermal neutron scattering (1979)
    [s.l.] : Nature Publishing Group
    Nature 279 (1979), S. 657-657 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THERMAL neturons are used widely to study structures and correlations in solids and liquids. They have just the right wavelength for atomic physics; and, as nuclear scattering takes place effectively at a point, one can use the scattered intensity to disentangle the motion of atoms. The momentum ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/279657b0
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  • 3
    Electronic Resource
    Electronic Resource
    Pions and nuclei (1981)
    [s.l.] : Nature Publishing Group
    Nature 289 (1981), S. 614-615 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] NUCLEAR forces are due to exchange of mesons such as the pion. If, in nuclear structure physics at low energy, one gives nucleons a nudge weak compared with these strong forces, a rich excitation spectrum results. The meson factories now allow systematic study of much larger excitations, using ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/289614a0
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  • 4
    Electronic Resource
    Electronic Resource
    First observations of Pontecorvo reactions with a recoiling neutron (1995)
    Springer
    The European physical journal 351 (1995), S. 325-331 
    Details
    ISSN: 1434-601X
    Keywords: 25.43
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract 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(¯pd→ηn)=(3.19+0.48)×10−6, BR(¯pd→ωn)=(22.8+4.1)×10−6, BR(¯pd→η′n)14×10−6 (at 95% confidence level). Assuming charge independence, our result for¯ pd→π0n is compatible with measurements of the only other observed Pontecorvo reaction ¯pd → π−p. The experimental ratios between the above branching ratios are in fair agreement with both the statistical model and dynamical two-step models (assumingN¯ N annihilation into two mesons, with subsequent absorption of one meson on the remaining nucleon). This agreement suggests that there may be appreciable rates for Pontecorvo reactions producing final state mesons with masses above 1 GeV.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01290916
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  • 5
    Electronic Resource
    Electronic Resource
    The pion nucleon coupling constant (2004)
    Springer
    The European physical journal 33 (2004), S. 505-509 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. The latest ${\rm\pi} N$ elastic scattering data are re-analysed to determine the coupling constant g c of the charged pion, using the dispersion relation for the invariant amplitude B (+ ). Depending on the choice of data-base, values $g^2_c/4{\rm\pi} = 13.80$ to 13.65 are obtained with errors of $\pm 0.12$ . The mass difference between charge states of $\Delta (1232)$ is $M^0 -M^{ + + } = 2.0 \pm 0.4$ MeV, close to twice the mass difference between neutron and proton. The difference in widths on resonance is $\Gamma^0 - \Gamma^{ + + } = 3.8 \pm 1.0$ MeV. One may account for a width difference of 4.5 MeV from phase space for decays and the extra channel $\Delta^0 \to \gamma n$ .
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epjc/s2004-01666-y
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  • 6
    Electronic Resource
    Electronic Resource
    Partial wave analysis of $\bar pp \to \bar \Lambda \Lambda$ (2004)
    Springer
    The European physical journal 36 (2004), S. 161-168 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. A partial wave analysis of PS185 data for $\bar pp \to \bar \Lambda \Lambda$ is presented. A 3 S 1 cusp is identified in the inverse process $\bar \Lambda \Lambda \to \bar p p$ at threshold, using detailed balance to deduce cross sections from $\bar pp \to \bar \Lambda \Lambda$ . Partial wave amplitudes for $\bar pp$ 3 P 0, 3 F 3, 3 D 3 and 3 G 3 exhibit a behaviour very similar to resonances observed in Crystal Barrel data. With this identification, the $\bar pp \to \bar \Lambda \Lambda$ data then provide evidence for a new I = 0, J PC = 1- resonance with mass $M = 2290 \pm 20$ MeV, $\Gamma = 275 \pm 35$ MeV, coupling to both 3 S 1 and 3 D 1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epjc/s2004-01955-5
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  • 7
    Electronic Resource
    Electronic Resource
    Antiproton-proton annihilation at rest into two-body final states (1993)
    Springer
    The European physical journal 58 (1993), S. 175-189 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We report measurements of branching ratios for production of a series of two meson final states in $$\bar p$$ p annihilations at rest in liquid hydrogen. We find: $$\begin{gathered} BR(\bar pp \to \pi ^ + \pi ^ - ) = (3.07 \pm 0.13) \cdot 10^{ - 3} \hfill \\ BR(\bar pp \to K^ + K^ - ) = (0.99 \pm 0.05) \cdot 10^{ - 3} \hfill \\ BR(\bar pp \to \pi ^0 \pi ^0 ) = (6.93 \pm 0.43) \cdot 10^{ - 4} \hfill \\ BR(\bar pp \to \pi ^0 \eta ) = (2.12 \pm 0.12) \cdot 10^{ - 4} \hfill \\ BR(\bar pp \to \pi ^0 \omega ) = (5.73 \pm 0.47) \cdot 10^{ - 3} \hfill \\ BR(\bar pp \to \pi ^0 \eta ') = (1.23 \pm 0.13) \cdot 10^{ - 4} \hfill \\ BR(\bar pp \to \eta \eta ) = (1.64 \pm 0.10) \cdot 10^{ - 4} \hfill \\ BR(\bar pp \to \eta \omega ) = (1.51 \pm 0.12) \cdot 10^{ - 2} \hfill \\ BR(\bar pp \to \eta \eta ') = (2.16 \pm 0.25) \cdot 10^{ - 4} \hfill \\ BR(\bar pp \to \omega \omega ) = (3.32 \pm 0.34) \cdot 10^{ - 2} \hfill \\ BR(\bar pp \to \omega \eta ') = (0.78 \pm 0.08) \cdot 10^{ - 2} \hfill \\ \end{gathered}$$ These are the first measurements of the channels ηη′ and ωη′ and in almost all the other channels are more precise than previous results. We also obtain, in a more precise fashion, the following ratios of branching ratios:K + K −/π+π−=0.323±0.013, π0η′/π0η=0.548±0.056, ηη′/ηη=0.31±0.15, ωη′/ωη=0.515±0.040, π0η/π0π0=0.303±0.010, ηη/π0π0=0.232±0.011 and π0ω/ηω=0.377±0.12. The measurements are made for different η and η′ decays, and we thus obtain Γη→3π 0/Γη→γγ=0.841±0.034, and $$\Gamma _{\eta ' \to \gamma \gamma } /\Gamma _{\eta ' \to \pi ^0 \pi ^0 \eta } = 0.091 \pm 0.009$$ .
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01560336
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  • 8
    Electronic Resource
    Electronic Resource
    The phase of the $\sigma \to \pi \pi$ amplitude in $J/\Psi \to \omega \pi^ + \pi^-$ (2004)
    Springer
    The European physical journal 37 (2004), S. 433-436 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. The phase variation of the $\sigma \to \pi \pi$ amplitude is accurately determined as a function of mass from BES II data for $J/\Psi \to \omega \pi^ + \pi^-$ . The determination arises from interference with the strong $b_1(1235)\pi$ amplitude. The observed phase variation agrees within errors with that in $\pi \pi$ elastic scattering.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epjc/s2004-02031-0
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