Article
Chemistry, Multidisciplinary
Mohammad Sahil, Tejender Singh, Soumya Ghosh, Jagannath Mondal
Summary: In this study, a multisubstrate-bound state, named the 3site state, was discovered in cytochrome P450cam. This state involves the simultaneous binding of three camphor molecules in different locations around P450cam, which communicate with each other and cooperate to make the enzyme functional. The 3site state fits the NMR data better than previously known bound states and suggests a departure from the conventional understanding of cytochrome P450.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Physics, Multidisciplinary
Masaru Hongo, Dam Thanh Son
Summary: The study presents an effective field theory of a two-neutron halo nucleus under specific conditions, showing that many properties of the system are universal, such as the ratio of mean-square matter radius and charge radius, as well as the shape of the E1 dipole strength function. The article estimates that higher-order corrections to the theory are limited for the C-22 nucleus under certain conditions.
PHYSICAL REVIEW LETTERS
(2022)
Article
Astronomy & Astrophysics
Hong Qiang Zhu, Yin Huang
Summary: This paper explores the possible interpretation of Y(4274) as a hadron molecular state of D-s and (D) over bar (s0) (2317) mesons, based on the measurement of its J psi phi decay model by the LHCb Collaboration. The results show that Y(4274) is unlikely to be a D-s(D) over bar (s0) (2317) molecular state, while a J(P) =1(+)D(s)(D) over bar (s0) molecular state model may be a closer fit to the experimental data.
Article
Materials Science, Multidisciplinary
Xiong Fan, Xi Dai
Summary: This paper demonstrates that the WKB quantization rule can be used to analyze the Andreev bound states in nonuniform superconductors. The study considers the effects of nonhomogeneous superconductivity gap functions Delta(x) and other parameters such as the Bogoliubov quasiparticle energy E, Fermi level EF, and total momentum p. Through the application of the WKB method to the Bogoliubov-de Gennes equation, two major results are obtained regarding the determination of the bound states under different conditions.
Article
Chemistry, Physical
Stanka Jerosimic, Milan Milovanovic, Marko Mitic, Roland Wester, Francesco A. Gianturco
Summary: We present quantum structure calculations that demonstrate the possible existence of dipole-bound states for the anion C(5)N(-) in the Interstellar medium. These calculations are important for understanding the formation of more tightly bound valence bound states in environments where free electrons from starlight ionization processes are available.
Article
Physics, Nuclear
Xiang-Kun Dong, Bing-Song Zou
Summary: The study indicates possible bound states around masses of 3110 MeV and 3240 MeV in similar (D) over bar K-1 systems, but the (D) over bar K-1 systems are not strong enough to form bound states.
EUROPEAN PHYSICAL JOURNAL A
(2021)
Article
Physics, Fluids & Plasmas
Pritha Dolai, Simon Krekels, Christian Maes
Summary: We demonstrate that two active particles can form a bound state by coupling to a driven nonequilibrium environment. In this study, we focus on the scenario where two noninteracting run-and-tumble probes move on a ring and interact with driven colloids. Under certain conditions, these active probes become trapped in a bound state. From the perspective of a comoving frame, an interesting analogy with Cooper pairing can be observed, as the behavior of these run-and-tumble particles resemble that of electrons.
Article
Physics, Nuclear
C. Pan, K. Y. Zhang, P. S. Chong, C. Heo, M. C. Ho, J. Lee, Z. P. Li, W. Sun, C. K. Tam, S. H. Wong, R. W-Y Yeung, T. C. Yiu, S. Q. Zhang
Summary: Investigations suggest possible bound nuclei beyond the two-neutron drip line in the Z range of 50 to 70, forming peninsulas of stability in the nuclear landscape. Additionally, multineutron emitters are predicted near these peninsulas. The crucial role of deformation effects in forming these stable peninsulas is highlighted in the study.
Article
Astronomy & Astrophysics
Meng-Jie Zhao, Zhen-Yang Wang, Chao Wang, Xin-Heng Guo
Summary: The study shows that only the isoscalar D (D) over bar*=B (B) over bar* and DD (D) over bar*= B (B) over bar* systems can exist as bound states, while other systems do not meet this criterion.
Article
Chemistry, Multidisciplinary
Yun-Yi Pai, Claire E. Marvinney, Ganesh Pokharel, Jie Xing, Haoxiang Li, Xun Li, Michael Chilcote, Matthew Brahlek, Lucas Lindsay, Hu Miao, Athena S. Sefat, David Parker, Stephen D. Wilson, Jason S. Gardner, Liangbo Liang, Benjamin J. Lawrie
Summary: The discovery that phonons can carry pseudo-angular momentum has significant implications in various fields, including phonon chirality, Berry curvature of phonon band structure, and the phonon Hall effect. Researchers have observed a vibronic bound state in NaYbSe2, a candidate quantum spin liquid, and measured the angular momentum transfer between phonons and the crystalline electric field using polarization- and magnetic-field-dependent Raman microscopy. This provides a new pathway for selectively addressing the phononic angular momentum through electronic, spin, and orbital degrees of freedom in emerging quantum materials.
Article
Multidisciplinary Sciences
Bo Zhuang, Rivo Ramodiharilafy, Ursula Liebl, Alexey Aleksandrov, Marten H. Vos
Summary: This study revealed the photophysical properties of anionic semireduced flavin radicals and discovered their photoproducts in five different flavoprotein oxidases. It was found that photoexcitation leads to the oxidation of protein-bound anionic flavin radicals on a fast timescale, followed by decay of the generated photoproducts within a narrow time range. The active-site residues were proposed as the electron acceptors based on computational analysis.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Biochemical Research Methods
N. Upendra, S. Krishnaveni
Summary: Ribosome biogenesis GTPase A (RbgA) is involved in the late steps of the 50S ribosomal subunit maturation. The bound nucleotide affects the conformational shifts of RbgA, and systems with GDP and pppGpp bound exhibit a larger distribution of conformations. Mutations at the C-terminal and Sw-II conserved residues also lead to a larger conformational distribution. The presence of Mg2+ promotes the GTPase activity of SaRbgA.
JOURNAL OF MOLECULAR GRAPHICS & MODELLING
(2022)
Article
Multidisciplinary Sciences
Anna Grudinina, Maria Efthymiou-Tsironi, Vincenzo Ardizzone, Fabrizio Riminucci, Milena De Giorgi, Dimitris Trypogeorgos, Kirk Baldwin, Loren Pfeiffer, Dario Ballarini, Daniele Sanvitto, Nina Voronova
Summary: Characterizing the spectra of low-lying elementary excitations is crucial for studying bosonic quantum fluids, but the low occupancy of non-condensate states makes them difficult to observe. However, recent advancements in coupling electromagnetic resonance to semiconductor excitons have allowed the realization of low-threshold Bose-Einstein condensation in symmetry-protected bound states in the continuum. In this study, the authors investigate the peculiarities of the Bogoliubov excitation spectrum in this system, revealing interesting features such as energy-flat parts, linearization at non-zero momenta, and anisotropic sound velocity.
NATURE COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Yan Yan, Somnath Mukherjee, Kaleeckal G. Harikumar, Timothy S. Strutzenberg, X. Edward Zhou, Kelly Suino-Powell, Ting-Hai Xu, Ryan D. Sheldon, Jared Lamp, Joseph S. Brunzelle, Katarzyna Radziwon, Abigail Ellis, Scott J. Novick, Irving E. Vega, Russell G. Jones, Laurence J. Miller, H. Eric Xu, Patrick R. Griffin, Anthony A. Kossiakoff, Karsten Melcher
Summary: AMPK regulates cellular metabolism by modulating AL phosphorylation and accessibility, with ATP inhibiting its activity when levels are low. Researchers have developed antibodies and analyzed structures to reveal the mechanism by which adenine nucleotides and pharmacological agonists regulate AMPK activity.
Article
Engineering, Electrical & Electronic
Chonghao Wu, Yong Yao, Qianchao Wu, Yanfu Yang, Jiajun Tian, Ke Xu
Summary: Versatile structures of wavelength-dependent bound solitons are obtained using NPR mode-locked technology in an anomalous-dispersion fiber laser. Different types of bound solitons can be generated and switched by adjusting the operating wavelength of the laser and optimizing intra-cavity birefringence, leading to significant changes in spectral interference fringes and temporal separation between bound solitons. Experimental findings also show wavelength-dependent multiple-soliton bound states formed by altering initial settings of laser parameters. The formation and evolution mechanism of the bound states are explored in this work.
OPTICAL FIBER TECHNOLOGY
(2021)
Article
Physics, Particles & Fields
Guang-Juan Wang, Lu Meng, Li-Ye Xiao, Makoto Oka, Shi-Lin Zhu
Summary: The mass spectrum and strong decays of S-wave csqq states in the compact tetraquark scenario were systematically studied. The recently observed X0(2900) might be a good candidate for a tetraquark state, while future experimental search for X(2649) will be helpful.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Astronomy & Astrophysics
Qi Meng, Masayasu Harada, Emiko Hiyama, Atsushi Hosaka, Makoto Oka
Summary: The spectrum of the doubly heavy tetraquarks, bb (q) over bar(q) over bar, is investigated in a constituent quark model. Several narrow resonant states are found, including a mixed state of a compact tetraquark and a B* B* scattering state driven by a strong color Coulombic attraction between the bb quarks. In addition, negative-parity excited resonances exhibit similar structures to the lambda-mode of a singly heavy baryon due to the attractive correlation for the doubly heavy diquark.
Article
Physics, Multidisciplinary
Zhi Yang, Guang-Juan Wang, Jia-Jun Wu, Makoto Oka, Shi-Lin Zhu
Summary: A novel framework is proposed to extract near-threshold resonant states from lattice QCD energy levels and is applied to study the structures of positive parity D-s mesons. The quark model, quark-pair-creation mechanism, and D-(*K-) interaction are incorporated into the effective field theory to analyze the composition of the D-s mesons. The results show that the physical D-s0* (2317) and D-s1* (2460) are mixtures of bare c (s) over bar core and D-(*K-) component, while the D-s1* (2536) and D-s2* (2573) are dominated by the bare CS%.
PHYSICAL REVIEW LETTERS
(2022)
Review
Physics, Multidisciplinary
Hua-Xing Chen, Wei Chen, Xiang Liu, Yan-Rui Liu, Shi-Lin Zhu
Summary: The past decades have seen significant advancements in hadron physics, particularly in the observation of excited open heavy flavor mesons and baryons since 2017. This review provides updated information on the recent experimental and theoretical developments in this field, including the observation of unconventional heavy hadrons, tetraquark states, and hidden heavy flavor multiquark states. Additionally, the review covers progress in understanding glueballs and light hybrid mesons, which are manifestations of the non-Abelian SU(3) gauge interaction in Quantum Chromodynamics at low energies.
REPORTS ON PROGRESS IN PHYSICS
(2023)
Article
Physics, Particles & Fields
Zhi Yang, Guang-Juan Wang, Jia-Jun Wu, Makoto Oka, Shi-Lin Zhu
Summary: In this study, we investigated the near-threshold P-wave B-s states using the Hamiltonian effective field theory, combining the quark model, the quark-pair-creation mechanism and B-(*)(K) over bar interaction. By fitting the lattice data and applying the heavy quark flavor symmetry, we determined all the parameters in the D-s sector. The predicted masses of the bottom-strange partners of the D-30*(2317) and D-31*(2460) are consistent with lattice QCD simulation. We also observed a crossing point in the finite volume spectrum, which corresponds to a CDD zero in the B(K) over bar scattering T-matrix, providing further insights into the near-threshold states.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Multidisciplinary Sciences
Chuanhui Jiang, Yi Jin, Shi-Yuan Li, Yan-Rui Liu, Zong-Guo Si
Summary: The production mechanism of multiquark exotic hadrons in high energy multiproduction processes is determined by the structure of the relevant exotic hadrons and important aspects of high energy scattering. The T(cs)s and T-c (S) over bar family of open charm tetraquarks, observed in B decay at a mass pole around 2900 MeV, can be studied in multiproduction processes to gain insights into their structure. By considering their similarities to Xi(c), Sigma(c), and Lambda(c), the production properties of the tetraquark family can be predicted if they are produced as compact four-quark states. Physics suggests that fluctutations in color and baryon number can enhance the production rates of baryons and four-quark states through diquark fragmentation in high energy scattering. We have calculated the production properties of the tetraquark family T(cs)s and T-c (S) over bar at LHC energy for future LHC measurements.
Article
Astronomy & Astrophysics
Qi Meng, Emiko Hiyama, Makoto Oka, Atsushi Hosaka, Chang Xu
Summary: The spectrum of doubly heavy tetraquarks is studied in a quark model, showing that the compact bound states are shifted up due to the repulsive central force between quarks and antiquarks. This effect may explain the small binding energy in Tcc. Additionally, a resonant state is reported.
Article
Astronomy & Astrophysics
Hao Liu, Yuan-He Zou, Yan-Rui Liu, Shao-Zhou Jiang
Summary: The relativistic chiral Lagrangians for doubly charmed baryons of spin-1/2 and spin-3/2 are constructed up to the order O(p(4)). There are a total of 19, 74, and 452 independent terms in the two-flavor case and 25, 112, and 864 independent terms in the three-flavor case from O(p(2)) to O(p(4)). The chiral Lagrangians in the heavy diquark limit are also obtained.
Article
Astronomy & Astrophysics
Yonghee Kim, Makoto Oka, Daiki Suenaga, Kei Suzuki
Summary: We formulate a chiral effective theory of scalar and vector diquarks based on SU(3)R x SU(3)L chiral symmetry, including interactions between scalar and vector diquarks with one or two mesons. The interaction term with two mesons breaks the U(1)A and flavor SU(3) symmetries. By investigating one-pion emission decays of singly heavy baryons, we determine the coupling constants of the interaction Lagrangians and make predictions of the unobserved decay widths of singly heavy baryons. We also study the change of masses and strong decay widths of singly heavy baryons under partial restoration of chiral symmetry.
Article
Physics, Particles & Fields
Jun Jiang, Shao-Zhou Jiang, Shi-Yuan Li, Yan-Rui Liu, Zong-Guo Si, Hong-Qian Wang
Summary: This paper investigates the relations between low-energy constants in the chiral Lagrangians with ?(1232) and those in the quark-level description model. The obtained results may contribute to further investigations involving the ?(1232) baryons.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Astronomy & Astrophysics
Guang-Juan Wang, Qi Meng, Makoto Oka
Summary: In this study, we calculate the mass spectrum of the S-wave fully-charmed tetraquark resonant states using the nonrelativistic quark model and identify the genuine resonances with the complex scaling technique. The results show the existence of two resonances in each J(PC) sector, and the higher resonances may be good candidates for the X(7200) state.
Article
Astronomy & Astrophysics
Jun Jiang, Shao-Zhou Jiang, Shi-Yuan Li, Yan-Rui Liu, Zong-Guo Si, Hong-Qian Wang
Summary: The symmetry of the quark model can establish relations between low-energy constants in the baryon chiral perturbation theory. By examining the correspondence between SU(2) and SU(3) descriptions at the quark level, relations between the low-energy constants in different orders of the chiral perturbation theory are found. Numerical analysis provides support for these relations.
Article
Astronomy & Astrophysics
Nodoka Yamanaka, Makoto Oka
Summary: This study evaluates the contribution of the CP-violating three-gluon interaction proposed by Weinberg to the short-range CP-odd nuclear force. The results show that this contribution is comparable to the CP-even short-range nuclear force and has a significant impact, especially in the calculation of the electric dipole moment of the 3He nucleus.
Article
Astronomy & Astrophysics
Yonghee Kim, Makoto Oka, Kei Suzuki
Summary: The energy spectrum of doubly heavy tetraquarks, TQQ (QQq??q?? with Q = c, b and q = u, d, s), is investigated in the potential chiral-diquark model. The Tbb, Tcc, and Tcb tetraquarks are described as a three-body system composed of two heavy quarks and an antidiquark. Several Tbb bound states are found, and the change of TQQ tetraquark masses under restoration of chiral symmetry is also studied.
Correction
Astronomy & Astrophysics
Kiyoshi Sasaki, Naruhito Ishizuka, Makoto Oka, Takeshi Yamazaki
Article
Astronomy & Astrophysics
Nelson R. F. Braga, Octavio C. Junqueira
Summary: This study investigates the influence of rotation on the transition temperature of strongly interacting matter produced in non-central heavy ion collisions. By using a holographic description of an AdS black hole, the authors extend the analysis to the more realistic case where the matter spreads over a region around the rotational axis. The results show the coexistence of confined and deconfined phases and are consistent with the concept of local temperature in rotating frames developed by Tolman and Ehrenfest.
Article
Astronomy & Astrophysics
Bing Sun, Jiachen An, Zhoujian Cao
Summary: This paper investigates the effect of gravitational constant variation on the propagation of gravitational waves. By employing two analytical methods, the study finds that variations in the gravitational constant result in amplitude and phase corrections for gravitational waves, and the time variation of the gravitational constant can be constrained through the propagation of gravitational waves.
Article
Astronomy & Astrophysics
Abdellah Touati, Zaim Slimane
Summary: This letter presents the first study of Hawking radiation as a tunneling process within the framework of non-commutative gauge theory of gravity. The non-commutative Schwarzschild black hole is reconstructed using the Seiberg-Witten map and the star product. The emission spectrum of outgoing massless particles is computed using the quantum tunneling mechanism. The results reveal pure thermal radiation in the low-frequency scenario, but a deviation from pure thermal radiation in the high-frequency scenario due to energy conservation. It is also found that noncommutativity enhances the correlations between successively emitted particles.
Article
Astronomy & Astrophysics
Shahar Hod
Summary: The travel times of light signals between two antipodal points on a compact star's surface are calculated for two different trajectories. It is shown that, for highly dense stars, the longer trajectory along the surface may have a shorter travel time as measured by asymptotic observers. A critical value of the dimensionless density-area parameter is determined for constant density stars to distinguish cases where crossing through the star's center or following a semi-circular trajectory on the surface has a shorter travel time as measured by asymptotic observers.
