scholarly journals Measuring the charged pion polarizability in the γγ → π^{+} π^{-} reaction

2013 ◽  
Author(s):  
David Lawrence ◽  
Rory Miskimen ◽  
Elton S Smith ◽  
Alexander Muskarenkov
Keyword(s):  
Charged Pion ◽  
Pion Polarizability

scholarly journals Measurement of the Charged-Pion Polarizability

2015 ◽  
Vol 114 (6) ◽  
Author(s):  
C. Adolph ◽  
R. Akhunzyanov ◽  
M. G. Alexeev ◽  
G. D. Alexeev ◽  
A. Amoroso ◽  
...  
Keyword(s):  
Charged Pion ◽  
Pion Polarizability

scholarly journals Compton scattering off pions and electromagnetic polarizabilities

2019 ◽  
Vol 34 (16) ◽  
pp. 1930008 ◽  
Author(s):  
Murray Moinester ◽  
Stefan Scherer
Keyword(s):  
Compton Scattering ◽  
Cross Sections ◽  
Charged Pion ◽  
Chiral Symmetry Breaking ◽  
Goldstone Boson ◽  
Text Data ◽  
Two Photon ◽  
Pion Polarizability ◽  
Theoretical Predictions ◽  
Stringent Test

The electric [Formula: see text] and magnetic [Formula: see text] Compton polarizabilities of both the charged and the neutral pion are of fundamental interest in the low-energy sector of quantum chromodynamics (QCD). Pion polarizabilities affect the shape of the [Formula: see text] Compton scattering angular distribution at back scattering angles and [Formula: see text] absolute cross sections. Theory derivations are given for the [Formula: see text] Compton scattering differential cross section, dispersion relations, and sum rules in terms of the polarizabilities. We review experimental charged and neutral polarizability studies and theoretical predictions. The [Formula: see text] polarizabilities were deduced from DESY Crystal Ball [Formula: see text] data, but with large uncertainties. The charged pion polarizabilities were deduced most recently from (1) radiative pion Primakoff scattering [Formula: see text] at CERN COMPASS, (2) two-photon pion pair production [Formula: see text] at SLAC Mark II, and (3) radiative pion photoproduction [Formula: see text] from the proton at MAMI in Mainz. A stringent test of chiral perturbation theory (ChPT) is possible based on comparisons of precision experimental charged pion polarizabilities with ChPT predictions. Only the CERN COMPASS charged pion polarizability measurement has acceptably small uncertainties. Its value [Formula: see text] agrees well with the two-loop ChPT prediction [Formula: see text], strengthening the identification of the pion with the Goldstone boson of chiral symmetry breaking in QCD.

scholarly journals The Das-Mathur-Okubo sum rule for the charged pion polarizability in a chiral model

1999 ◽  
Vol 457 (1-3) ◽  
pp. 1-8 ◽  
Author(s):  
S.P. Klevansky ◽  
R.H. Lemmer ◽  
C.A. Wilmot
Keyword(s):  
Charged Pion ◽  
Chiral Model ◽  
Sum Rule ◽  
Pion Polarizability

Measurement of high lying nucleon resonances and search for a missing state in double charged pion electroproduction off the proton

2003 ◽  
Vol 117 ◽  
pp. 668-670
Author(s):  
E. Golovach ◽  
V. Burkert ◽  
V. Mokeev ◽  
M. Ripani ◽  
M. Anghinolfi ◽  
...  
Keyword(s):  
Charged Pion ◽  
Pion Electroproduction ◽  
Nucleon Resonances

Experimental Study of Double-Charged Pion Production in (π−,p) Collisions at 900 MeV

1963 ◽  
Vol 130 (1) ◽  
pp. 357-361 ◽  
Author(s):  
Derek C. Colley ◽  
Joseph T. Ratau
Keyword(s):  
Experimental Study ◽  
Pion Production ◽  
Charged Pion

Method of Analysis of Charged Pion Photoproduction

1956 ◽  
Vol 104 (5) ◽  
pp. 1451-1453 ◽  
Author(s):  
Michael J. Moravcsik
Keyword(s):  
Charged Pion ◽  
Pion Photoproduction

scholarly journals Regge approach to charged pion photoproduction at invariant energies above 2 GeV

2007 ◽  
Vol 34 (1) ◽  
Author(s):  
A. Sibirtsev ◽  
J. Haidenbauer ◽  
S. Krewald ◽  
T. -S. H. Lee ◽  
U. -G. Meißner ◽  
...  
Keyword(s):  
Charged Pion ◽  
Pion Photoproduction ◽  
Regge Approach
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