Prospects for the Primakoff measurement of the pion polarizability at COMPASS
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چکیده
Using high rate capability in conjunction with high precision, COMPASS can significantly contribute to the physics studied at very low momentum transfers as in Primakoff reactions, that is, the scattering of hadrons off the quasi-real photons forming the Coulomb field of nuclei. Most importantly, it has the unique chance to clarify the question of the pion polarisability, where an unprecedented level of precision is in reach.
منابع مشابه
Pion and Kaon Polarizabilities at CERN COMPASS
Objective: The electric (ᾱ) and magnetic (β̄) pion Compton polarizabilities characterize the pion’s deformation in the electromagnetic field of the γ during γπ Compton scattering. They depend on the rigidity of the pion’s internal structure as a composite particle. The polarizabilities deduced by Antipov et al. in their low statistics Primakoff experiment (∼ 7000 events) were ᾱπ = −β̄π = 6.8 ± 1....
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Objective: The electric (ᾱ) and magnetic (β̄) pion Compton polarizabilities characterize the pion’s deformation in the electromagnetic field of the γ during γπ Compton scattering. They depend on the rigidity of the pion’s internal structure as a composite particle. The polarizabilities deduced by Antipov et al. in their low statistics Primakoff experiment (∼ 7000 events) were ᾱπ = −β̄π = 6.8± 1.4...
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تاریخ انتشار 2009