Research interests

My research interest is primarily focused on the study of quantum chromodynamics (QCD) and its application to hadron physics. QCD is the fundamental theory of the strong interaction that describes the behavior of quarks and gluons, the elementary constituents of hadrons such as protons and neutrons. Our goal is to deepen our understanding on the properties and behavior of these strongly interacting particles, including their spectroscopy, structure, and interactions in matter. My research focuses on developing theoretical models to investigate various aspects of hadron physics, and to test and validate these models against experimental data and lattice QCD simulation. This includes the use of effective Lagrangian models, chiral quark models, light-front quark models, and other theoretical frameworks to study the properties of hadrons.

Hadron structure

One of my research intersts is in the field of hadron physics on the light front. The light front is a unique reference frame for studying the dynamics of hadrons, where the front of light cone is used as the hyperplane to describe the hadron's momentum. This framework has become increasingly important in recent years, as it provides a natural way to describe the internal structure of hadrons in a relativistic framework. My work in this field is focused on using the light-front quark model (LFQM) to study the phenomenology of hadron spectroscopy and structure. By analyzing the mass spectra and wave functions of hadron, we can gain a deeper understanding of the dynamics of quarks and gluons within these particles. Additionally, we explore the impact of different model parameters and compare the results with experimental data, in order to refine the theoretical framework and improve our understanding of hadron physics.

Selected publications

1. Pseudoscalar meson decay constants and distribution amplitudes up to twist 4 in the light-front quark model
   Article  A. J. Arifi, H.M. Choi, and C.R. Ji (June, 2023)
   Published in: Phys.Rev.D 108, 013006 (2023) , [ ArXiv: 2306.08536 ].
2. Independence of current components, polarization vectors, and reference frames in the light-front quark model analysis of meson decay constants
   Article  A. J. Arifi, H.M. Choi, C.R. Ji and Y. Oh (Oct 23, 2022)
   Published in: Phys.Rev.D 107, 053003 (2023) , [ ArXiv: 2210.12780 ].
3. Mixing effects on 1S and 2S state heavy mesons in the light-front quark model
   Article  A. J. Arifi, H.M. Choi, C.R. Ji and Y. Oh (May 9, 2022)
   Published in: Phys.Rev.D 106, 014009 (2022) , [ ArXiv: 2205.04075 ].

Hadron production and decays

My research focus is on understanding the dynamics of hadronic resonances through their production in scattering and multi-body decay processes. Hadron resonances are typically produced through scattering processes utilizing various probes such as meson or photon beam, but in recent years, there has been a growing interest in analyzing multi-body decays of heavy particles to study hadron resonances. The Dalitz plot analysis has become a promising tool for this purpose and was used in the discovery of the $P_c$ pentaquark. However, the analysis of multi-body decay requires a careful approach such as coupled channel amplitude analysis. As a result, it has become a crucial and active area of research in the field of hadron spectroscopy, with promising prospects for the discovery of new hadron resonances in various experimental facilities.

Selected publications

1. Relativistic corrections to decays of heavy baryons in the quark model
   Article  A. J. Arifi, D. Suenaga, and A. Hosaka (May 10, 2021)
   Published in: Phys.Rev.D 103, 094003 (2021), [ Arxiv: 2102.03754 ].
2. Roper-like resonances with various flavor contents and their two-pion emission decays
   Article  A. J. Arifi, H. Nagahiro, A. Hosaka, and K. Tanida (Jun 16, 2020)
   Published in: Phys.Rev.D 101, 111502(R) (2020), [ ArXiv: 2102.03754 ].
3. Three-body decay of Λ_c(2765) and determination of its spin-parity
   Article  A. J. Arifi, H. Nagahiro, A. Hosaka, and K. Tanida (May 21, 2020)
   Published in: Phys.Rev.D 101, 094023 (2020), [ ArXiv: 2003.08202 ]

Hadron in nuclear matter

My research interest lies in exploring the intricate dynamics of quark-meson coupling within nuclear matter and its implications for hadron behavior. Utilizing theoretical frameworks such as effective field theories and lattice QCD simulations, I aim to model the microscopic interactions between quarks and mesons in dense nuclear environments, shedding light on phenomena like quark confinement and chiral symmetry breaking. By integrating theoretical predictions with experimental observations from nuclear reactions, deep inelastic scattering, and heavy-ion collisions, I seek to deepen our understanding of the fundamental forces governing hadron properties in complex nuclear settings. Ultimately, my research endeavors to unravel the underlying mechanisms shaping the behavior of subatomic particles within the intricate landscape of nuclear matter.

Selected publications

1. In-medium properties of the light and heavy-light mesons in a light-front quark model
   Article  A. J. Arifi, P.T.P. Parada, and K. Tsushima (Feb 23, 2023)
   Published in: Phys.Rev.D 107, 114010 (2023) , [ ArXiv: 2302.12382 ].

Few-body problems in hadrons

My research interest is focused on elucidating few-body problems within hadronic systems, particularly employing the Gaussian expansion method. By leveraging this computational technique, I aim to dissect the intricate interplay of constituent quarks and gluons within hadrons, unraveling their collective behavior and dynamic interactions. Through theoretical modeling and numerical simulations, I seek to elucidate the underlying structure and properties of hadronic systems, including exotic states and resonances, shedding light on their emergence and manifestation in experimental observations. Additionally, I aim to explore the implications of few-body dynamics in hadrons for understanding fundamental aspects of quantum chromodynamics (QCD) and its role in shaping the properties of strongly interacting particles. Ultimately, my research endeavors to advance our comprehension of the intricate dynamics governing hadronic systems and their relevance in the broader context of subatomic physics.

Selected publications

1. Structure of Heavy Mesons in the Light-Front Quark Model
   Article  A. J. Arifi, L. Happ, S. Ohno, and M. Oka (2024)
   Published in: Phys.Rev.D 110, 014020 (2024), [ ArXiv: 2401.07933 ].