Search Results - "Ahmadiniaz, Naser"

Low-energy limit of N-photon amplitudes in a constant field by Ahmadiniaz, Naser, Lopez-Lopez, Misha A., Schubert, Christian

“…While the QED photon amplitudes at full momentum so far have been calculated only up to the six-photon level, in the low-energy limit there are explicit…”
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Non-planar one-loop Parke-Taylor factors in the CHY approach for quadratic propagators by Ahmadiniaz, Naser, Gomez, Humberto, Lopez-Arcos, Cristhiam

“…A bstract In this work we have studied the Kleiss-Kuijf relations for the recently introduced Parke-Taylor factors at one-loop in the CHY approach, that…”
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The QED four – photon amplitudes off-shell: Part 1 by Ahmadiniaz, Naser, Lopez-Arcos, Cristhiam, Lopez-Lopez, Misha A., Schubert, Christian

“…The present paper is the first in a series of four where we use the worldline formalism to obtain the QED four-photon amplitude completely off-shell. We…”
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Reducible contributions to quantum electrodynamics in external fields by Ahmadiniaz, Naser, Edwards, James P., Ilderton, Anton

“…A bstract We consider one-particle reducible (1PR) contributions to QED and scalar QED processes in external fields, at one-loop and two-loop order. We…”
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The QED four-photon amplitudes off-shell: Part 2 by Ahmadiniaz, Naser, Lopez-Arcos, Cristhiam, Lopez-Lopez, Misha A., Schubert, Christian

“…This is the second one of a series of four papers devoted to a first calculation of the scalar and spinor QED four-photon amplitudes completely off-shell. We…”
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Manifest colour-kinematics duality and double-copy in the string-based formalism by Ahmadiniaz, Naser, Balli, Filippo Maria, Corradini, Olindo, Lopez-Arcos, Cristhiam, Quintero Vélez, Alexander, Schubert, Christian

“…The relation for the gravity polarisation tensor as the tensor product of two gluon polarisation vectors has been well-known for a long time, but a version of…”
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Compton-like scattering of a scalar particle with N photons and one graviton by Ahmadiniaz, Naser, Balli, Filippo Maria, Corradini, Olindo, Dávila, José Manuel, Schubert, Christian

“…Tree-level scattering amplitudes for a scalar particle coupled to an arbitrary number N of photons and a single graviton are computed. We employ the worldline…”
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Master formulas for the dressed scalar propagator in a constant field by Ahmad, Aftab, Ahmadiniaz, Naser, Corradini, Olindo, Kim, Sang Pyo, Schubert, Christian

“…The worldline formalism has previously been used for deriving compact master formulas for the one-loop N-photon amplitudes in both scalar and spinor QED, and…”
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U(N) Yang-Mills in non-commutative space time by Ahmadiniaz, Naser, Corradini, Olindo, Edwards, James P., Pisani, Pablo

“…A bstract We present an approach to U ⋆ ( N ) Yang-Mills theory in non-commutative space based upon a novel phase-space analysis of the dynamical fields with…”
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Generalized LKF Transformations for -Point Fermion Correlators in QED by Nicasio, José, Ahmadiniaz, Naser, Edwards, J. P., Schubert, Christian

“…Within the worldline approach to quantum electrodynamics (QED), a change of the photon’s covariant gauge parameter is investigated to analyse the…”
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Form factor decompositions of the QCD four - gluon vertex by Ahmadiniaz, Naser, Schubert, Christian

“…The Bern-Kosower formalism, originally developed around 1990 as a novel way of obtaining on-shell amplitudes in field theory as limits of string amplitudes,…”
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Obtaining Fully Polarized Amplitudes in Gauge Invariant Form by Ahmadiniaz, Naser, Banda Guzman, Victor Miguel, Bastianelli, Fiorenzo, Corradini, Olindo, Edwards, James P., Schubert, Christian

“…We describe progress applying the Worldline Formalism of quantum field theory to the fermion propagator dressed by -photons to study multi-linear Compton…”
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Multiphoton amplitude in a constant background field by Ahmad, Aftab, Ahmadiniaz, Naser, Corradini, Olindo, Kim, Sang Pyo, Schubert, Christian

“…In this contribution, we present our recent compact master formulas for the multiphoton amplitudes of a scalar propagator in a constant background field using…”
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Off-shell Ward identities for N-gluon amplitudes by Ahmadiniaz, Naser, Schubert, Christian

“…Off-shell Ward identities in non-abelian gauge theory continue to be a subject of active research, since they are, in general, inhomogeneous and their form…”
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A covariant representation of the Ball–Chiu vertex by Ahmadiniaz, Naser, Schubert, Christian

“…In nonabelian gauge theory the three-gluon vertex function contains important structural information, in particular on infrared divergences, and is also an…”
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Sauter-Schwinger Effect for Colliding Laser Pulses by Kohlfürst, Christian, Ahmadiniaz, Naser, Oertel, Johannes, Schützhold, Ralf

“…Via a combination of analytical and numerical methods, we study electron-positron pair creation by the electromagnetic field A(t,r)=[f(ct-x)+f(ct+x)]e_{y} of…”
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Generalized LKF Transformations for $$\boldsymbol{N}$$-Point Fermion Correlators in QED by Nicasio, José, Ahmadiniaz, Naser, Edwards, J. P., Schubert, Christian

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String-inspired representations of photon/gluon amplitudes by Ahmadiniaz, Naser, Schubert, Christian, Villanueva, Victor M.

“…A bstract The string-based Bern-Kosower rules provide an efficient way for obtaining parameter integral representations of the one-loop N -photon/gluon…”
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Noncommutative U(1) gauge theory from a worldline perspective by Ahmadiniaz, Naser, Corradini, Olindo, D’Ascanio, Daniela, Estrada-Jiménez, Sendic, Pisani, Pablo

“…A bstract We study pure noncommutative U(1) gauge theory representing its one-loop effective action in terms of a phase space worldline path integral. We write…”
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Assisted neutrino pair production in combined external fields by Ahmadiniaz, Naser, Shaisultanov, Rashid, Schützhold, Ralf

“…Neutrino--antineutrino ($\nu\bar\nu$) pair production is one of the main processes responsible for the energy loss of stars. Apart from the collision of two…”
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