34 citations · 145 across the 21 of their papers we have counts for
15 papers · 1 filter
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…
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…