Stephen L. Adler
Selected papers with commentaries (for an unindexed final draft,
see hep-ph/0505177)
Book ordering information
-
My book ``Adventures in Theoretical Physics:
Selected Papers with Commentaries ''
was published by World Scientific Publishing Company in
January, 2006. It can be ordered online at
http://www.worldscibooks.com/physics/5856.html.
Current list of book addenda and errata
- In connection with the discussion of chiral symmetry breaking on
page 92, Yu. Kalashnikova, A. Nefediev, and E. Ribeiro have pointed
out four recent papers that show how an effective Lorentz scalar
potential can arise from a fundamental Lorentz vector force. The
references are: N. Brambilla and A. Vairo, Phys. Lett. B407 (1997) 167;
Yu. S. Kalashnikova and A. V. Nefediev, Phys. Lett. B414 (1997) 149;
Yu. S. Kalashnikova, A. V. Nefediev, and J. E. F. T. Ribeiro, Phys.
Rev. D72 (2005) 034020; A. V. Nefediev and Yu. A. Simonov, JETP Lett.
82 (2005) 557.
- In discussing reprint R9 on page 16 of the Commentaries,
I briefly mentioned that this paper included a pion-pion sum rule.
In 1965 there was insufficient data to check this sum rule, but recent data allows a precise evaluation, and confirms that a large S0 wave contribution is needed for saturation: see S. L. Adler and F. J. Yndurain,
arXiv: 0704.1201 [hep-ph]. This paper also includes a detailed
discussion of pion off shell extrapolation corrections, for both
the pion-pion and pion-nucleon sum rules.
- In connection with this work, Paco Yndurain prompted me to
search for references on two-pion production in pion nucleon scattering,
which allow me to update my discussion of the work of Nambu, Lurie, and
Shrauner that applied the Nambu-Lurie pion bremsstrahlung formula to
inelastic pion production. In the final section of Shrauner's 1963 paper, he suggests that the pion peripheral diagram, in which a pion is
emitted from the nucleon line and undergoes pion-pion scattering with
the incident pion, may be important; this point was also made by S. Weinberg in his 1966-1967 Phys. Rev. Lett. articles on pion scattering lengths and effective Lagrangians. Subsequent developments have
borne this out: see the papers M. G. Olsson and
L. Turner, Phys. Rev. Lett. 20, 1127 (1968) and
Phys. Rev. 181, 2141 (1969), which show that near inelastic threshold, a
chiral effective Lagrangian calculation
including the peripheral diagram along with pion bremsstrahlung from the external nucleon lines gives a satisfactory fit to experiment.
For relatively
recent reviews with full theoretical and experimental
references, see D. Pocanic, arXiv:hep-ph/
9809455, and the article by Pocanic in A. M Bernstein and B. R. Holstein,
eds. ``Chiral Dynamics: Theory and Experiment'', Springer Lecture Notes in Physics no. 452 (1995).
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