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Title of Journal: Nuov Cim A

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Abbravation: Il Nuovo Cimento A (1965-1970)

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Società Italiana di Fisica

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DOI

10.1002/cber.19100430246

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ISSN

1826-9869

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Analysis of the reaction πSuperscript+/Superscr

Authors: R O Maddock G F Pinter D Evans C Caso F Conte D Teodoro G Tomasini H Fesefeld P von Handel H Nagel P K Schilling G Cecchet L Mandelli S Ratti L Tallone Lombardi M Chaumet A Daudin M Faccini M A Jabiol J F Lefur C Lewin J Mallet
Publish Date: 2007/10/18
Volume: 5, Issue: 3, Pages: 433-456
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Abstract

The difficulty in determining the total and the differential crosssections of the doubleresonance process π+p → ρ0Δ++ is discussed and a method of determining these is given which involves only few theoretical assumptions The total crosssection is 032±004 mb The joint decay angular distribution is analysed in terms of statistical tensor and density matrix elements The data are consistent with pion exchangeОбсуждается трудность при определении полного и дифференциального поперечных сечений процесса с двойным реэонансом π+p → ρ0Δ++ Приводится метод определения зтих сечений который включает лищь несколько теоретических предположений Полное поперечное сечение составляет 032±004 мб Аналиэируется угловое распределение совместного распада в терминах злементов статистического тенэора и матрицы плотности Полученные данные согласуются с пионным обменомSi discutono le difficoltà di determinare le sezioni d’urto totale e differenziale del processo di produzione associata di due risonanze di notevole larghezza come la reazione π+p → ρ0Δ++ e si propone un metodo che richiede soltanto un minimo di ipotesi La sezione d’urto totale così misurata risulta 032±004 mb Nel lavoro si studia anche la distribuzione completa della disintegrazione di entrambe le risonanze in termini sia di tensori statistici che di elementi di matrice «densità di spin» I dati sperimentali sono consistenti con un meccanismo di produzione a scambio di un pione

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  2. Projector in constrained quantum dynamics
  3. Pion inclusive distribution at cosmic-ray energies and comparison with ISR data
  4. Primakoff effect and π 0 lifetime
  5. Computation of forward pp dispersion relations
  6. A new approach to heavy-ion fusion
  7. A measurement of the magnetic moment of the Σ + -hyperon
  8. Elastic and inelastic scattering of 0.8 GeV polarized protons from 18 O
  9. Surface waves in pion-proton elastic scattering
  10. A study of two-pion exchange contributions to quasi-elastic scattering at high energies
  11. Discrimination between the standard theory of electroweak interactions and its extensions
  12. Coloured supersymmetry
  13. Three generations and a large top-quark mass
  14. Doppler shift attenuation measurements on 57 Fe and 57 Co
  15. Charge radii of nucleons
  16. Regge poles with kinematic cuts in pion photoproduction
  17. Existence of solutions of partial-wave dispersion relations and singular N/D equations
  18. SU 9 «composite» symmetry and weak interactions
  19. Small-angle scattering and absorption of 3.0 GeV/c antiprotons in nuclear emulsion
  20. The spectrum of b $$\bar c$$ , t $$\bar c$$ and t $$\bar b$$ ; bound states in the two-step potential model
  21. The sequential light-particle emission in peripheral heavy-ion collisions. A theoretical approach
  22. Energy gain of spherical shell targets ablatively imploded by thermal radiation
  23. Finite-energy sum rules on hyperbolas. — II
  24. K X-ray spectrum of Na excited by photons
  25. Singular-value decomposition of the nucleon-nucleon reactance matrix
  26. Inelastic π - 3 He interaction at 180 MeV 3 He interaction at 180 MeV
  27. Mechanism of particle production in nucleon-nucleon interactions at very high energies
  28. 852 keV first-forbidden beta transition in 115 Cd g
  29. Natural orbital calculations of nucleon momentum distributions
  30. A redefinition of quantum-mechanical exchange and Coulomb integrals by a reinterpretation of atomic and molecular orbitals as Taylor expansions of a potential and a similar treatment of the electromagnetic field.
  31. Two-variable crossing-symmetric expansion of the ππ scattering amplitude and low-energy parameter sum rules
  32. Reduction of complex electromagnetic fields to the irreducible representations of the inhomogeneous Lorentz group
  33. Investigation of the 149 Sm (n, α) 146 Nd reaction induced by fast neutrons
  34. Conformal covariance of Dirac-Maxwell and ’t Hooft-Polyakov monopole theories
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  38. The pion decay constant as a scale for hadron dynamics
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  40. The 12 C+ 12 C→α+ 20 Ne reaction mechanism and angular-momentum effects
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  44. Vertex functions and form factors for conformal spin-1/2 systems
  45. Baryon properties in chiral models
  46. Nuclear models and the hypernuclear interaction
  47. A χ 2 -test to study the α 1 , α 2 , α 3 convergence for high-precision LEP data, having in mind the SUSY threshold
  48. A study of the low-mass part of the (Kππ) system in the reaction K − p→K − pπ + π − at 8.25 GeV/c
  49. A homological approach to parametric Feynman integrals
  50. Once more on the role of the bound-state wave function in the leptonic decays of light hadrons
  51. Dynamical fission and transitional mechanisms in medium-mass heavy-ion reactions
  52. Non-regge and hyper-regge effects in pion-nucleon charge exchange scattering at high energies
  53. Direct reconstruction of the pp scattering matrix below 500 MeV, an attempt
  54. Alternative interaction between spinor and Yang-Mills fields
  55. The proton leading-particle spectrum at accelerator energies
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  57. Lifetime of the ∑ − -hyperon
  58. A new approach to conformal invariant field theories
  59. Effective trajectories in the presence of Regge cuts
  60. π—-p interactions at 650 MeV
  61. Composite gauge fields from nonlinear realizations
  62. Approximate saturation of the algebra of axial currents
  63. A general treatment of current algebra
  64. Piecewise analyticity of S -matrix elements and nonlocal interactions
  65. The deck model for nucleon diffraction dissociation at very high energies
  66. Deformation and interaction energies in statistical multifragmentation
  67. Strings and fields
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  72. A boundary-condition model for the P 33 pion-nucleon state
  73. O 4 invariance of a Bethe-Salpeter equation
  74. Tests for general models of deep inelastic lepton scattering
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  80. A temporarily free SU 6 gauge field theory model for strong interactions
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