34 citations · 145 across the 21 of their papers we have counts for
21 papers
Scattering off unstable states
Francesco Giacosa, Vanamali Shastry
Unstable states that live long enough may appear as in(out)going particles in scattering experiments. Yet, the standard QFT approach strictly applies only to fully stable asymptoti…
A unitary coupled-channel three-body amplitude with pions and kaons
Yuchuan Feng, Fernando Gil, Michael Döring +4
Three-body dynamics above threshold is required for the reliable extraction of many amplitudes and resonances from experiment and lattice QCD. The S-matrix principle of unitarity c…
Sill distribution: genesis and salient features
Francesco Giacosa, Vanamali Shastry
We present the so-called Sill distribution, both in the nonrelativistic and relativistic cases, as a natural and simple way to include the effect of threshold(s) on the energy line…
Off-shellness in generalized parton distributions and form factors of the pion
Vanamali Shastry, Wojciech Broniowski, Enrique Ruiz Arriola
We study the effects of off-shellness in the generalized parton distributions of the pion. On general grounds, these distributions exhibit a richer structure than in the on-shell c…
Ambiguities in Partial Wave Analysis of Two Spinless Meson Photoproduction
JPAC Collaboration, W. A. Smith, D. I. Glazier +13
We describe the formalism to analyze the mathematical ambiguities arising in partial-wave analysis of two spinless mesons produced with a linearly polarized photon beam. We show th…
Dynamics in near-threshold photoproduction
JPAC Collaboration, D. Winney, C. Fernandez-Ramirez +12
The study of photoproduction at low energies has consequences for the understanding of multiple aspects of nonperturbative QCD, ranging from mechanical properties of the prot…
Off-shell generalized parton distributions of the pion
Wojciech Broniowski, Vanamali Shastry, Enrique Ruiz Arriola
We analyze off-shell effects in the generalized parton distributions (GPDs) of the pion in the context of the Sullivan electroproduction process, as well as the corresponding half-…
Radiative production and decays of the exotic and its siblings
Vanamali Shastry, Francesco Giacosa
We study the production of the light hybrid isoscalars and the yet undiscovered as intermediate states in the radiative decays…
Higgs-Higgs scattering and the (non-)existence of the Higgsonium
Vanamali Shastry, Francesco Giacosa
We study the Higgs-Higgs scattering process and the possible emergence of a Higgs-Higgs bound state (Higgsonium) in any Higgs potential with the vacuum expectation value and second…
The hybrid nonet of and : analysis and predictions for the kaonic members
Vanamali Shastry
The hybrid mesons form a part of the exotic spectrum of the standard model. The recent observation of the isoscalar hybrid, called the , provides an important step towar…
Off-shell generalized parton distributions and form factors of the pion
Wojciech Broniowski, Vanamali Shastry, Enrique Ruiz Arriola
Off-shell effects in generalized parton distributions (GPDs) of the pion, appearing, e.g., in the Sullivan process, are considered. Due to the lack of crossing symmetry, the moment…
Generalized quasi, Ioffe-time, and pseudo quark distributions of the pion in the Nambu--Jona-Lasinio model
Vanamali Shastry, Wojciech Broniowski, Enrique Ruiz Arriola
We analyze the generalized quasi, Ioffe-time, and pseudo distributions of the valence quarks in the pion at the quark model scale. We use the framework of the Nambu-Jona-Lasinio mo…
The phenomenology of the exotic hybrid nonet with and
Vanamali Shastry, Christian S. Fischer, Francesco Giacosa
We study the decays of the hybrid nonet using a Lagrangian invariant under the flavor symmetry, parity reversal, and charge conjugation. We use the available experi…
Ratios of Partial Wave Amplitudes in the Decays of and Mesons
Vanamali Shastry
We study the two-body decay of mesons using the covariant helicity formalism. We find that to explain the ratio of partials wave amplitudes (PWAs) of the decay, the Lagrangian must…
Constraints imposed by the partial wave amplitudes on the decays of mesons
Vanamali Shastry, Enrico Trotti, Francesco Giacosa
We study the two-body decays of mesons using the covariant helicity formalism. In particular, we show how the partial wave analysis of decays constrains the interacting terms enter…
A simple alternative to the Breit-Wigner distribution
Francesco Giacosa, Anna Okopińska, Vanamali Shastry
First, we discuss the conditions under which the non-relativistic and relativistic types of the Breit-Wigner energy distributions are obtained. Then, upon insisting on the correct…
CFNS Ad-Hoc meeting on Radiative Corrections Whitepaper
Andrei Afanasev, Jaseer Ahmed, Igor Akushevich +25
Current precision scattering experiments and even more so many experiments planed for the Electron Ion Collider will be limited by systematics. From the theory side, a fundamental…
Radiative and chiral corrections to elastic lepton-proton scattering in chiral perturbation theory
Pulak Talukdar, Vanamali C. Shastry, Udit Raha +1
A unified treatment of both chiral and radiative corrections to the low-energy elastic lepton-proton scattering processes is presented in Heavy Baryon Chiral Perturbations Theory.…
Lepton-Proton Two-Photon Exchange in Chiral Perturbation Theory
Pulak Talukdar, Vanamali C. Shastry, Udit Raha +1
We use heavy baryon chiral perturbation theory to evaluate the two-photon exchange corrections to the low-energy elastic lepton-proton scattering at next-to-leading order accuracy,…
Effect of Confinement of Gluons and One Pion Exchange in Nucleon-Nucleon Interaction
V K Nilakanthan, V C Shastry, S Raghavendra +1
The Nucleon-Nucleon interaction in the singlet () and triplet () channels have been studied in the framework of Relativistic Harmonic Model using the Resonating Gro…
Effects of Finite Size of Constituent Quarks on Nucleon-Nucleon Interaction
Vanamali C. Shastry, K. B. Vijaya Kumar
We have investigated the effect of the finite size of the constituent quarks on singlet and triplet nucleon-nucleon potentials, obtained in the framework of the nonrelativi…