Regge Poles in Weak Interactions and in Form Factors

1966 ◽  
pp. 77-85
Author(s):  
K. Raman
Keyword(s):  
Weak Interactions ◽  
Form Factors ◽  
Regge Poles

scholarly journals Multipole expansion for the electron-nucleus scattering at high energies in the unified electroweak theory

2014 ◽  
Vol 4 (4) ◽  
pp. 38-44
Author(s):  
Zuyen Phu Luong ◽  
Huu Ha Nguyen
Keyword(s):  
Cross Section ◽  
Weak Interactions ◽  
Form Factors ◽  
Multipole Expansion ◽  
Electromagnetic Form Factors ◽  
Electroweak Theory ◽  
High Energies ◽  
Nucleus Scattering ◽  
Partial Form ◽  
Definite Angular Momentum

The article presents the multipole expansion for the electron-nucleus scattering cross-section at high energies within framework of the unified electroweak theory. The electroweak currents of  the nucleus is expanded into simple components with definite angular momentum, which are called the multipole form factors. The multipole expansion of the cross-section is a consequence of the above expansion. Besides the familiar electromagnetic form factors FxL , there are new form factors VLX and ALX related to weak interactions, corresponding to the vector and axial weak currents. The obtained general expressions are applied to the nucleus 36Li , where the partial form factors are computed in the multiparticle shell model.

Regge poles in weak interactions - I

1964 ◽  
Vol 33 (2) ◽  
pp. 545-565 ◽  
Author(s):  
K. Raman
Keyword(s):  
Weak Interactions ◽  
Regge Poles

scholarly journals Current algebra, Regge poles and form factors

1970 ◽  
Vol 15 (1) ◽  
pp. 1-16 ◽  
Author(s):  
R. Jengo ◽  
E. Remiddi
Keyword(s):  
Current Algebra ◽  
Form Factors ◽  
Regge Poles

scholarly journals Leptonic decays of strange particles - C.E.R.N. work on weak interactions

1965 ◽  
Vol 285 (1401) ◽  
pp. 202-213 ◽  
Keyword(s):  
Weak Interactions ◽  
Mass Difference ◽  
Form Factors ◽  
Strange Particle ◽  
Branching Ratios ◽  
Decay Rates ◽  
Leptonic Decays ◽  
Muon Polarization ◽  
Constant Form ◽  
Three Body

Experimental results on strange particle leptonic decays are summarized and compared with predictions based on the Δ S = + Δ Q , |Δ I | = ½ and Δ S ǂ 2 rules, CP invariance and electron-muon universality. Recent (and still preliminary) results on K 0 1.2 → π ± + e ∓ + v , K + → π + + π ± + e ∓ + v and Ʃ ± → N + ( μ or e ) ± + v are compatible with little (< 10%) or no violation of the Δ S = + Δ Q rule. Three-body leptonic decay rates of K + and K 0 disagree by about two standard deviations with the |Δ I = ½ rule prediction, but the agreement is restored if ca . 10% |Δ I | = 3/2 admixture is allowed. No Δ S = 2, ≡ - → N + e - + v or ≡ 0 → p + e - + v decays have been observed to the level of ca . 1% of the normal decays. All the data are in good agreement with time reversal or CP invariance and with the assumptions that the lepton pair is coupled locally and that electrons and muons behave identically apart from effects of their mass difference. † The branching ratios for the various hyperon leptonic decays and the observed V-A form for A β decay are explained qualitatively by the theory of Cabibbo, for example, but the data are not yet precise enough for a sharp test of the theory. New data on K + → π 0 + ( e or μ ) + + v spectra, branching ratios and muon polarization indicate that the interaction is of the vector form with approximately constant form factors and that the form factor ratio f - / f + is of order 1 or compatible with 0, as in the case of K 0 2 → π ± + e ∓ + v .

Axial-vector form factors from current algebra Regge poles and Veneziano model

1971 ◽  
Vol 33 (1) ◽  
pp. 303-316 ◽  
Author(s):  
C.A. Dominguez ◽  
O. Zandron
Keyword(s):  
Current Algebra ◽  
Axial Vector ◽  
Form Factors ◽  
Veneziano Model ◽  
Vector Form ◽  
Regge Poles

scholarly journals QED factorization of non-leptonic B decays

2020 ◽  
Vol 2020 (11) ◽  
Author(s):  
Martin Beneke ◽  
Philipp Böer ◽  
Jan-Niklas Toelstede ◽  
K. Keri Vos
Keyword(s):  
Weak Interactions ◽  
Branching Fractions ◽  
Form Factors ◽  
New Physics ◽  
Final States ◽  
Final State ◽  
Qcd Factorization ◽  
Factorization Formula ◽  
Qed Effects ◽  
Electrically Charged

Abstract We show that the QCD factorization approach for B-meson decays to charmless hadronic two-body final states can be extended to include electromagnetic corrections. The presence of electrically charged final-state particles complicates the framework. Nevertheless, the factorization formula takes the same form as in QCD alone, with appropriate generalizations of the definitions of light-cone distribution amplitudes and form factors to include QED effects. More precisely, we factorize QED effects above the strong interaction scale ΛQCD for the non-radiative matrix elements $$ \left\langle {M}_1{M}_2\left|{Q}_i\right|\overline{B}\right\rangle $$ M 1 M 2 Q i B ¯ of the current-current operators from the effective weak interactions. The rates of the branching fractions for the infrared-finite observables $$ \overline{B}\to {M}_1{M}_2\left(\gamma \right) $$ B ¯ → M 1 M 2 γ with photons of maximal energy ∆E ≪ ΛQCD is then obtained by multiplying with the soft-photon exponentiation factors. We provide first estimates for the various electromagnetic corrections, and in particular quantify their impact on the πK ratios and sum rules that are often used as diagnostics of New Physics.

Regge-poles and form factors

1962 ◽  
Vol 1 (8) ◽  
pp. 349-350 ◽  
Author(s):  
G. Domokos ◽  
J. Wolf
Keyword(s):  
Form Factors ◽  
Regge Poles
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