Multiparticle scattering amplitudes with spin - independent Poincaré - transformation properties

1974 ◽  
Vol 10 (10) ◽  
pp. 3480-3494 ◽  
Author(s):  
Graham L. Tindle
Keyword(s):  
Scattering Amplitudes ◽  
Poincaré Transformation ◽  
Multiparticle Scattering

scholarly journals Gauge invariant decomposition of 1-loop multiparticle scattering amplitudes

2002 ◽  
Vol 531 (1-2) ◽  
pp. 83-89 ◽  
Author(s):  
Alessandro Vicini
Keyword(s):  
Scattering Amplitudes ◽  
Gauge Invariant ◽  
Multiparticle Scattering

Generalized Faddeev Integral Equations for Multiparticle Scattering Amplitudes

1965 ◽  
Vol 140 (1B) ◽  
pp. B217-B226 ◽  
Author(s):  
Leonard Rosenberg
Keyword(s):  
Scattering Amplitudes ◽  
Integral Equations ◽  
Multiparticle Scattering

scholarly journals Zwanziger’s pairwise little group on the celestial sphere

2021 ◽  
Vol 2021 (11) ◽  
Author(s):  
Luke Lippstreu
Keyword(s):  
Scattering Amplitudes ◽  
Soft Photon ◽  
Late Time ◽  
Poincaré Group ◽  
Poincare Group ◽  
Link Type ◽  
Celestial Sphere ◽  
Poincaré Transformation ◽  
Do So

Abstract We generalize Zwanziger’s pairwise little group to include a boost subgroup. We do so by working in the celestial sphere representation of scattering amplitudes. We propose that due to late time soft photon and graviton exchanges, matter particles in the asymptotic states in massless QED and gravity transform under the Poincaré group with an additional pair of pairwise celestial representations for each pair of matter particles. We demonstrate that the massless abelian and gravitational exponentiation theorems are consistent with the proposed pairwise Poincaré transformation properties. For massless QED we demonstrate that our results are consistent with the effects of the Faddeev-Kulish dressing and the abelian exponentiation theorem for celestial amplitudes found in arXiv:2012.04208. We discuss electric and magnetic charges simultaneously as it is especially natural to do so in this formalism.

Two-particle scattering amplitudes with spin-independent poincaré-transformation properties

1975 ◽  
Vol 11 (6) ◽  
pp. 1688-1700 ◽  
Author(s):  
Graham L. Tindle
Keyword(s):  
Scattering Amplitudes ◽  
Particle Scattering ◽  
Poincaré Transformation

Regge poles in multiparticle scattering amplitudes

1975 ◽  
Vol 84 (2) ◽  
pp. 397-412 ◽  
Author(s):  
Arthur R. Swift
Keyword(s):  
Scattering Amplitudes ◽  
Multiparticle Scattering ◽  
Regge Poles

scholarly journals Isospin-1/2 Dπ scattering and the lightest $$ {D}_0^{\ast } $$ resonance from lattice QCD

2021 ◽  
Vol 2021 (7) ◽  
Author(s):  
Luke Gayer ◽  
Nicolas Lang ◽  
Sinéad M. Ryan ◽  
David Tims ◽  
Christopher E. Thomas ◽  
...  
Keyword(s):  
Scattering Amplitudes ◽  
Lattice Qcd ◽  
Quark Mass ◽  
Light Quark ◽  
Energy Levels ◽  
Experimental Result ◽  
Infinite Volume ◽  
Resonance Pole ◽  
Strongly Coupled ◽  
Light Quark Mass

Abstract Isospin-1/2 Dπ scattering amplitudes are computed using lattice QCD, working in a single volume of approximately (3.6 fm)3 and with a light quark mass corresponding to mπ ≈ 239 MeV. The spectrum of the elastic Dπ energy region is computed yielding 20 energy levels. Using the Lüscher finite-volume quantisation condition, these energies are translated into constraints on the infinite-volume scattering amplitudes and hence enable us to map out the energy dependence of elastic Dπ scattering. By analytically continuing a range of scattering amplitudes, a $$ {D}_0^{\ast } $$ D 0 ∗ resonance pole is consistently found strongly coupled to the S-wave Dπ channel, with a mass m ≈ 2200 MeV and a width Γ ≈ 400 MeV. Combined with earlier work investigating the $$ {D}_{s0}^{\ast } $$ D s 0 ∗ , and $$ {D}_0^{\ast } $$ D 0 ∗ with heavier light quarks, similar couplings between each of these scalar states and their relevant meson-meson scattering channels are determined. The mass of the $$ {D}_0^{\ast } $$ D 0 ∗ is consistently found well below that of the $$ {D}_{s0}^{\ast } $$ D s 0 ∗ , in contrast to the currently reported experimental result.

scholarly journals KLT factorization of winding string amplitudes

2021 ◽  
Vol 2021 (6) ◽  
Author(s):  
Jaume Gomis ◽  
Ziqi Yan ◽  
Matthew Yu
Keyword(s):  
Scattering Amplitudes ◽  
Open String ◽  
Closed String ◽  
Open Strings ◽  
Toroidal Compactifications ◽  
Quantum Numbers ◽  
String Amplitudes

Abstract We uncover a Kawai-Lewellen-Tye (KLT)-type factorization of closed string amplitudes into open string amplitudes for closed string states carrying winding and momentum in toroidal compactifications. The winding and momentum closed string quantum numbers map respectively to the integer and fractional winding quantum numbers of open strings ending on a D-brane array localized in the compactified directions. The closed string amplitudes factorize into products of open string scattering amplitudes with the open strings ending on a D-brane configuration determined by closed string data.

scholarly journals Schwarzschild-Tangherlini metric from scattering amplitudes in various dimensions

2021 ◽  
Vol 103 (2) ◽  
Author(s):  
Stavros Mougiakakos ◽  
Pierre Vanhove
Keyword(s):  
Scattering Amplitudes

scholarly journals Four-particle scattering amplitudes in QCD at NNLO to higher orders in the dimensional regulator

2019 ◽  
Vol 2019 (12) ◽  
Author(s):  
Taushif Ahmed ◽  
Johannes Henn ◽  
Bernhard Mistlberger
Keyword(s):  
Scattering Amplitudes ◽  
Particle Scattering
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