isovector GMO
نویسندگان
چکیده
How precisely can we determine the πNN coupling constant from the isovector GMO sum rule? Abstract The isovector GMO sum rule for zero energy forward πN scattering is critically studied to obtain the charged πNN coupling constant using the precise π − p and π − d scattering lengths deduced recently from pionic atom experiments. This direct determination leads to g
منابع مشابه
/ 99 07 43 3 v 1 2 0 Ju l 1 99 9 1 Precision determination of the π N scattering lengths and the charged π NN coupling constant
We critically evaluate the isovector GMO sumrule for the charged πNN coupling constant using recent precision data from π − p and π − d atoms and with careful attention to systematic errors. From the π − d scattering length we deduce the pion-proton scattering lengths
متن کاملX iv : h ep - p h / 99 07 43 3 v 2 2 3 Ju l 1 99 9 1 Precision determination of the π N scattering lengths and the charged π NN coupling constant
We critically evaluate the isovector GMO sumrule for the charged πNN coupling constant using recent precision data from π − p and π − d atoms and with careful attention to systematic errors. From the π − d scattering length we deduce the pion-proton scattering lengths
متن کاملDetermination of the pion-nucleon coupling constant and scattering lengths
We critically evaluate the isovector Goldberger-Miyazawa-Oehme ~GMO! sum rule for forward pN scattering using the recent precision measurements of pp and pd scattering lengths from pionic atoms. We deduce the charged-pion-nucleon coupling constant, with careful attention to systematic and statistical uncertainties. This determination gives, directly from data, gc ~GMO!/4p514.1160.05~statistical...
متن کاملar X iv : h ep - p h / 97 08 49 8 v 1 2 9 A ug 1 99 7 Gell - Mann – Okubo Mass Formula Revisited
We show that the application of Regge phenomenology to SU(4) meson multiplets leads to a new Gell-Mann–Okubo mass-mixing angle formula in the SU(3) sector, 3m 2 1 + cos 2 θ m 2 0 + sin 2 θ m 2 0 ′ + √ 2 sin 2θ m 2 0 − m 2 0 ′ = 4m 2 1/2 , where m 1 , m 1/2 , m 0 , m 0 ′ are the masses of the isovector, isodoublet, isoscalar mostly octet and isoscalar mostly singlet states, respectively, and θ i...
متن کاملGMOtrack: generator of cost-effective GMO testing strategies.
Commercialization of numerous genetically modified organisms (GMOs) has already been approved worldwide, and several additional GMOs are in the approval process. Many countries have adopted legislation to deal with GMO-related issues such as food safety, environmental concerns, and consumers' right of choice, making GMO traceability a necessity. The growing extent of GMO testing makes it import...
متن کامل