Article
Chemistry, Multidisciplinary
Petra Stanic, Ivana Niksic-Franjic, Luka Pavic, Kresimir Molcanov
Summary: Five charge transfer complexes of electron donor N,N,N',N'-tetramethyl-p-phenylenediamine with quinoid electron acceptors were prepared and studied. X-ray crystallography, impedance spectroscopy, and DFT computations were employed in the investigation. Mixed donor-acceptor pi-stacks were observed in all compounds. All moieties had a partial radical character due to charge transfer.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Astronomy & Astrophysics
Akihiro Iwanaka, Daisuke Fujii, Atsushi Hosaka
Summary: In this study, we investigate the π meson emission decay of the first excited state of the negatively parity nucleon resonance N(1535) in the holographic model of QCD. The excited state is described as a vibrational mode along the extra z direction in the five-dimensional space-time of the model. We derive an analytic formula for the axial coupling gNN* A and obtain an off diagonal axial coupling of A ??? 0.32 at the decaying π meson. Consequently, we find a partial decay width of ??N*?????N ??? 30 MeV, which is smaller than but reasonably compared to the experimental data.
Article
Physics, Nuclear
K. Raya, L. X. Gutierrez-Guerrero, A. Bashir, L. Chang, Z. -F. Cui, Y. Lu, C. D. Roberts, J. Segovia
Summary: The study explores the gamma() + p -> N(1535) 1/2(-) transition and finds that the helicity amplitudes are highly sensitive to the diquark components in the baryon amplitudes. The nucleon amplitude is dominated by scalar and axial-vector diquark correlations, while the N(1535) 1/2(-) amplitude also contains significant pseudoscalar and vector diquark components. Despite limitations, the SCI analysis provides insights and can inform more sophisticated studies related to quantum chromodynamics.
EUROPEAN PHYSICAL JOURNAL A
(2021)
Article
Astronomy & Astrophysics
Manu Mathur, Atul Rathor
Summary: Exact duality transformations are constructed in pure SU(N) Hamiltonian lattice gauge theory in (2 + 1) dimension. This duality is obtained through a series of iterative canonical transformations on the SU(N) electric vector fields and their conjugate magnetic vector potentials on the four links around every plaquette. The resulting dual description is in terms of magnetic scalar fields or plaquette flux loops and their conjugate electric scalar potentials. Under SU(N) gauge transformations, they both transform like adjoint matter fields. The dual Hamiltonian describes the nonlocal self-interactions of these plaquette flux loops in terms of the electric scalar potentials and with inverted coupling. We show that these nonlocal loop interactions can be made local and converted into minimal couplings by introducing SU(N) auxiliary gauge fields along with new plaquette constraints. The matter fields can be included through minimal coupling. The techniques can be easily generalized to (3 + 1) dimensions.
Article
Psychology, Multidisciplinary
Gerardo Santaniello, Pilar Ferre, Alberto Sanchez-Carmona, Daniel Huete-Perez, Jacobo Albert, Jose A. Hinojosa
Summary: This study investigated the contribution of approach and avoidance motivational systems to the processing of emotional words, and found that fear words showed higher gamma power band synchronization compared to anger words. These results support the fear-hinders-action hypothesis, and highlight the importance of motivational features in the representation and processing of emotional words.
FRONTIERS IN PSYCHOLOGY
(2022)
Article
Astronomy & Astrophysics
Juan M. Torres-Rincon, Angels Ramos, Laura Tolos
Summary: Hadron femtoscopy is a useful tool for studying heavy-ion collisions and hadron interactions. In this study, the authors focus on heavy-flavor femtoscopy using the ALICE detector at the LHC. They compute correlation functions of D mesons and light mesons to access the wave function and predict correlation functions involving various meson combinations. The results provide insights into the energy states of meson systems.
Article
Physics, Nuclear
Attaphon Kaewsnod, Kai Xu, Zheng Zhao, Xuyang Liu, Sorakrai Srisuphaphon, Ayut Limphirat, Yupeng Yan
Summary: The helicity amplitudes of the N(1520) and N(1535) resonances in the y* p -> N* electromagnetic transition were studied using the constituent quark model. The results indicate that these resonances are primarily composed of three-quark L = 1 states, but may contain additional components. Contributions from meson clouds are unlikely to dominate at low Q(2).
EUROPEAN PHYSICAL JOURNAL A
(2022)
Article
Chemistry, Inorganic & Nuclear
Miguel A. Esteruelas, Sonia Moreno-Blazquez, Montserrat Olivan, Enrique Onate
Summary: This study investigates the competition between N,C,N-pincer ligands and N,N-chelate ligands in platinum(II) complexes, revealing coordination preferences and discovering highly efficient green phosphorescent emitters.
INORGANIC CHEMISTRY
(2023)
Article
Astronomy & Astrophysics
Neng-Chang Wei, Ai-Chao Wang, Fei Huang
Summary: The recently released data on differential cross sections for & gamma;n -K0E0 and & gamma;n -K+E- reactions from the A2 and BGOOD Collaborations were analyzed. The theoretical model proposed in previous work was found to qualitatively reproduce the A2 data but failed to describe the BGOOD data accurately. Further analysis showed that resonances N(1710)1/2+, N(1900)3/2+, and A(1910)1/2+ dominate the reactions in the lower energy region. The t-channel K*(892) exchange plays a crucial role at forward angles in the higher energy region.
Article
Chemistry, Physical
Daoyuan Qian, Thomas C. T. Michaels, Tuomas P. J. Knowles
Summary: In this study, a self-consistent analytical solution for the binodal concentrations of the two component Flory-Huggins phase separation model is derived. The derived form extends the validity range of Ginzburg-Landau expansion to cover the entire phase space. The analytical solution reveals an exponential scaling law of the dilute phase binodal concentration as a function of the interaction strength and chain length. This approach demonstrates its power by fitting experimental protein liquid-liquid phase separation boundaries and resolving differences in interaction energy contributions of individual amino acids.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Sang Loon Tan, Laura N. F. Cardoso, Marcus V. N. de Souza, Solange M. S. Wardell, James L. Wardell, Edward R. T. Tiekink
Summary: The crystal of (2-thienyl)CH2CON(H)-N.C(H)Ph was found to exhibit parallel, offset pi[C(= O)N(H)N = C]...pi(phenyl) interactions alongside more conventional non-covalent interactions. Analysis of the interactions showed that the pi[C(= O)N(H)N = C]...pi(phenyl) interactions are attractive, providing an energy of association of about 15 kJ mol(-1) in the molecular packing. These interactions occur in approximately 5-6% of crystals where they can potentially occur, according to a survey of related structures in the literature.
Article
Physics, Particles & Fields
Zhao-Wu Liu, Zhi-Tian Zou, Ying Li, Xin Liu, Jie Wang
Summary: In this work, the B-s -> VS decays are investigated using the perturbative QCD approach. The branching fractions and direct CP asymmetries are calculated, and it is found that most branching fractions are in the range of 10^(-7) to 10^(-5). Some decays exhibit large direct CP asymmetries, which can provide information about the structure of scalar mesons. These results are important for understanding the properties of B-s -> VS decays.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Energy & Fuels
Navindra Soodoo, Kosheela D. Poopalam, Laziz Bouzidi, Suresh S. Narine
Summary: The incorporation of a planar benzene ring between the two ester groups enhances the thermal stability and phase change properties of saturated aliphatic diesters sourced from vegetable oils. The benzene ring restricts intramolecular steric repulsion, increases intermolecular attractions, and limits molecular flexibility, leading to the formation of stable monomorphs and improved thermal properties. The enhanced thermal properties are mainly attributed to the pi-pi intermolecular attractions and resonance stabilized ester group formed by the benzene ring and ester groups.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2022)
Article
Materials Science, Multidisciplinary
Xiaoyu Yao, Fang Liu, Shulin Yang, Dongyan Liu, Dan Jia, Wenru Sun
Summary: The addition of cobalt promotes intergranular Laves precipitation and refines grains in 718 family alloys. It also increases the volume fraction of gamma ' and decreases the volume fraction of gamma '' precipitation. Cobalt influences the precipitation of gamma '-Ni3Al and gamma ''-Ni3Nb by affecting the solubility of Al and Nb in the Upsilon matrix and the composition of Nb-rich and Al-poor Laves phase precipitates.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Chemistry, Multidisciplinary
Petra Stanic, Ivana Niksic-Franjic, Kresimir Molcanov
Summary: The pancake bonding in dimers of semiquinoid radical cations in a novel compound, TMPD chloride co-crystal with 2,5-dichlorohydroquinone, was investigated using X-ray charge density and quantum chemical computations. The pancake-bonded dimer consists of parallel rings with a transversal offset, with an interplanar separation distance of 3.1191(1) angstrom and a centroid distance of 3.2022(2) angstrom. AIM analysis revealed four symmetry-independent bonding critical points and a cage critical point between the TMPD cations in the dimer, with a maximum electron density of 0.055 e angstrom-3. The highest occupied molecular orbital extends between both rings of the dimer. The estimated energy of the covalent component is -3.24 kcal mol-1.
CRYSTAL GROWTH & DESIGN
(2023)
Review
Physics, Nuclear
S. J. Brodsky, V. D. Burkert, D. S. Carman, J. P. Chen, Z-F Cui, M. Doring, H. G. Dosch, J. Draayer, L. Elouadrhiri, D. Glazier, A. N. Hiller Blin, T. Horn, K. Joo, H. C. Kim, V Kubarovsky, S. E. Kuhn, Y. Lu, W. Melnitchouk, C. Mezrag, V. Mokeev, J. W. Qiu, M. Radici, D. Richards, C. D. Roberts, J. Rodriguez-Quintero, J. Segovia, A. P. Szczepaniak, G. F. de Teramond, D. Winney
INTERNATIONAL JOURNAL OF MODERN PHYSICS E
(2020)
Article
Physics, Particles & Fields
R. Molina, M. Doring, W. H. Liang, E. Oset
Summary: The study evaluates the decay width of a(1)(1260) -> pi sigma(f(0)(500)), providing detailed explanations of the assumptions about the properties of the two resonances and the decay mechanism. Current experimental results show significant differences, indicating the need for additional efforts to accurately extract this important partial decay width.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Review
Physics, Multidisciplinary
Maxim Mai, Michael Doering, Akaki Rusetsky
Summary: The field of extracting two- and three-body hadronic scattering amplitudes and resonances from finite-volume energy levels in lattice QCD is rapidly developing. Robust parametrizations of infinite-volume scattering amplitudes are crucial, with a focus on three-body systems and discussions on formalism, chiral extrapolation, and finite-volume data analysis.
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
(2021)
Article
Physics, Multidisciplinary
Maxim Mai, Andrei Alexandru, Ruairi Brett, Chris Culver, Michael Doring, Frank X. Lee, Daniel Sadasivan
Summary: For the first time, the pole position and branching ratios of a three-body resonance have been calculated from lattice QCD, marking a new milestone in theoretical studies of ordinary resonances.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Jun-Xu Lu, Li-Sheng Geng, Michael Doering, Maxim Mai
Summary: Chiral perturbation theory and its unitarized versions have been instrumental in our understanding of low-energy strong interaction. In this study, the first global analysis of meson-baryon scattering up to one-loop order is presented. The results demonstrate that covariant baryon chiral perturbation theory, including unitarization for the negative strangeness sector, can accurately describe meson-baryon scattering data. This validates the validity of this important low-energy effective field theory of QCD.
PHYSICAL REVIEW LETTERS
(2023)
Article
Physics, Multidisciplinary
D. Sadasivan, M. Mai, M. Doring, Ulf-G. Meissner, F. Amorim, J. Klucik, Jun-Xu Lu, Li-Sheng Geng
Summary: By extending the coupled-channel S- and P-wave next-to-leading order chiral-unitary approach, we have successfully incorporated the new data from the KLOE and AMADEUS experiments as well as the Lambda pi mass distribution of the Sigma(1385) into the strangeness S = -1 meson-baryon scattering. We have calculated the positions of the poles on the second Riemann sheet corresponding to the S(1385) pole and the Lambda(1380) and Lambda(1405) poles, as well as the couplings of these states to various channels. The inclusion of KLOE and AMADEUS data has improved the average precision for determining resonance positions and branching ratios by about 20%.
FRONTIERS IN PHYSICS
(2023)
Article
Physics, Nuclear
D. Roenchen, M. Doering, U-G Meissner, C-W Shen
Summary: The Julich-Bonn dynamical coupled-channel approach is extended to include K Sigma photoproduction off the proton. Differential cross section and (double) polarization data for K+Sigma(0) and K- Sigma(+) are analyzed simultaneously with data from other production states. The spectrum of N* and Delta resonances is extracted based on the fit results.
EUROPEAN PHYSICAL JOURNAL A
(2022)
Article
Physics, Nuclear
M. Mai, M. Doering, C. Granados, H. Haberzettl, J. Hergenrather, Ulf-G Meissner, D. Roenchen, I Strakovsky, R. Workman
Summary: In this study, the electroproduction data of pion and eta particles are jointly analyzed for the first time up to a center-of-mass energy of 1.6 GeV. The results provide insights into the determination of resonance amplitudes in the near-threshold region. It is found that some amplitudes can be well determined while others require data over a wider energy range.
Article
Astronomy & Astrophysics
Daniel Sadasivan, Andrei Alexandru, Hakan Akdag, Felipe Amorim, Ruairi Brett, Chris Culver, Michael Doering, Frank X. Lee, Maxim Mai
Summary: In this study, the analytic structure of three-body scattering amplitudes on Riemann sheets of the complex energy plane is discussed, and the pole position of the a(1) (1260) meson is determined as an application.
Article
Astronomy & Astrophysics
Ruairi Brett, Chris Culver, Maxim Mai, Andrei Alexandru, Michael Doring, Frank X. Lee
Summary: In this study, a fit of the finite-volume QCD spectrum of three pions at maximal isospin was performed to constrain the three-body force. Results indicate consistency with a constant contact term close to zero for heavier pion mass, while showing statistically significant energy dependence for lighter mass. The findings also suggest the potential to constrain the two-body amplitude with sufficient three-body energy levels.
Article
Physics, Nuclear
M. Mai, M. Doering, C. Granados, H. Haberzettl, Ulf-G Meissner, D. Roenchen, I Strakovsky, R. Workman
Summary: The study analyzes pion electroproduction off the proton in a new framework based on a general parametrization of transition amplitudes, incorporating constraints from gauge invariance and threshold behavior. Large-scale fits were performed, resulting in a set of solutions with chi(2)(dof) = 1.69-1.81, allowing for the assessment of the systematic uncertainty of the approach.
Article
Astronomy & Astrophysics
D. Sadasivan, M. Mai, H. Akdag, M. Doring
Article
Astronomy & Astrophysics
M. Mai, M. Doring, C. Culver, A. Alexandru
Article
Astronomy & Astrophysics
Peng Guo, Michael Doring
Article
Astronomy & Astrophysics
Andrei Alexandru, Ruairi Brett, Chris Culver, Michael Doring, Dehua Guo, Frank X. Lee, Maxim Mai
