166 citations · 484 across the 40 of their papers we have counts for
38 papers · 1 filter
Approximate degeneracy of heavy-light mesons with the same
Takayuki Matsuki, Qi-Fang Lü, Yubing Dong +1
Careful observation of the experimental spectra of heavy-light mesons tells us that heavy-light mesons with the same angular momentum are almost degenerate. The estimate is giv…
Mixing angle between and in HQET
Takayuki Matsuki, Toshiyuki Morii, Kohichi Seo
Some claim that there are two independent mixing angles (, ) between and states of heavy-light mesons in heavy quark symmetric limit, an…
Derivation of a 1/r^2 potential term for QQ-bar in a potential model
T. Matsuki, X. Liu, T. Morii +1
We clarify the difference among potential models so far proposed to explain mass spectra of heavy-light mesons via transformations of the vacuum. Applying our idea to QQ-bar quarko…
Is the Z^+(4430) a radially excited state of D_s?
Takayuki Matsuki, Toshiyuki Morii, Kazutaka Sudoh
We present the interpretation that the recently discovered Z^+(4430) by the Belle Collaboration can be a radial excitation of the cs-bar state. We give an explicit cs-bar candidate…
Viable semi-relativistic quark model of heavy-light systems
T. Matsuki, T. Morii, K. Sudoh
The semi-relativistic quark potential model is surprisingly powerful for heavy-light systems if the bound state equation is treated correctly using 1/m_Q expansion with heavy quark…
Study of Structure of the Mass Gap between Two Spin Multiplets
Takayuki Matsuki, Toshiyuki Morii, Kazutaka Sudoh
Studying our semirelativistic potential model and the numerical results, which succeeds in predicting and reproducing recently discovered higher resonances of , , , and…
Structure of Mass Gap between Two Spin Multiplets
Takayuki Matsuki, Toshiyuki Morii, Kazutaka Sudoh
Studying our semirelativistic potential model and the numerical results, which succeeds in predicting and reproducing recently discovered higher resonances of , , , and…
New Heavy-Light Mesons
Takayuki Matsuki, Toshiyuki Morii, Kazutaka Sudoh
We succeed in reproducing the mesons, , , and that are recently reported by D0 and CDF, by using our semirelativistic quark po…
Solution to Trouble of D_sJ Particles
T. Matsuki, T. Morii, K. Sudoh
Recent discovery of D_sJ particles, which are considered to be a great trouble by experimentalists as well as theorists, had already been resolved by our potential model proposed s…
Study of Decays with Polarization in Perturbative QCD Approach
Han-Wen Huang, Cai-Dian Lu, Toshiyuki Morii +3
The , decays are useful to determine the CKM angle . Their polarization fractions are also interesting since the polarization puzzle of the $B\to ϕK^…
Spinor Operator Giving Both Angular Momentum and Parity
T. Matsuki, K. Mawatari, T. Morii +1
In heavy quark effective theory, heavy mesons which contain a heavy quark (or antiquark) are classified by , i.e., the total angular momentum and the parity $pi_l…
Probing Polarized Gluon Distributions through Charmed Hadron Production in Polarized pp Collisions at BNL--RHIC Energy
Toshiyuki Morii, Kazumasa Ohkuma
In order to extract information about behavior of polarized gluons in the nucleon, charmed hadron productions, i.e. D* meson and Lambda_c baryon productions, are studied in polariz…
One-Loop Helicity Amplitudes for Parton Level Virtual Compton Scattering
H. W. Huang, T. Morii
We calculate the one-loop QCD virtual corrections to all helicity amplitudes for parton level virtual Compton scattering processes. We include the amplitudes both on quark target p…
Production of (super)heavy quarkonia and new Higgs physics at hadron colliders
G. A. Kozlov, A. N. Sissakian, J. I. Khubua +3
Based on the two Higgs doublet model, we study the effect of Higgs-boson exchange on the (super)heavy quarkonium \bar QQ, which induces a strong attractive force between a (super)h…
Charmed Hadron Production in Polarized pp Reactions as a Probe of Polarized Gluons in the Proton
Toshiyuki Morii, Kazumasa Ohkuma
To probe the behavior of polarized gluons in the proton, we propose the charmed hadron, such as Lambda_c and D^*, production in the forthcoming RHIC experiments. We found that the…
Charmed Hadron Production in Polarized pp Collisions
Toshiyuki Morii, Kazumasa Ohkuma
To extract information about polarized gluons in the proton, production of charmed hadrons, in particular, Λ_c^+ baryon in pp collisions was studied. We calculated the transverse m…
Higgs mass sum rule in the light of searching for boson at the Tevatron
G. A. Kozlov, T. Morii
We discuss the Higgs boson mass sum rules in the Minimal Supersymmetric Standard Model in order to estimate the upper limits on the masses of stop quarks as well as the lower bound…
Semi-inclusive large- light hadron pair production as a probe of polarized gluons
T. Morii, Y. -B. Dong, T. Yamanishi
We propose a new formula for extracting the polarized gluon distribution in the proton from the large-- light hadron pair production in deep inelastic semi-inclusive reac…
Charmed Hadron Production at RHIC
Kazumasa Ohkuma, Toshiyuki Morii, Satoshi Oyama
To extract information about polarized gluon distribution in the proton, charmed hadron, actually Λ_c^+, productions at RHIC experiment are studied. We found that the spin correlat…
Charmed Hadron Production in Neutrino Reactions and Polarized s-quark Distribution
Kazutaka Sudoh, Toshiyuki Morii
In order to obtain information about the polarized strange quark distribution, we studied the semi-inclusive production in neutrino and polarized proton collisions.…
Perturbative and non-perturbative QCD corrections to wide-angle Compton scattering
H. W. Huang, P. Kroll, T. Morii
We investigate corrections to the handbag approach for wide-angle Compton scattering off protons at moderately large momentum transfer: the photon-parton subprocess is calculated t…
Electroproduction of psi' and polarized gluon distribution in a proton
Kazutaka Sudoh, Han-Wen Huang, Toshiyuki Morii
In order to get information about the polarized gluon distribution in a proton, we studied the electroproduction of ψ' in polarized electron and polarized proton collisions in the…
Single Diffractive Lambda_c^+ Production in Polarized pp Scattering with Polarized Gluon Distribution in the Proton
Kazumasa Ohkuma, Toshiyuki Morii
Based on the hard-scattering factorization which decomposes the diffractive structure function into a pomeron flux and a pomeron structure function, we study the single diffractive…
On a possible manifestation of f_1 trajectory in J/psi photoproduction
Dayeeta Roy, Toshiyuki Morii, and Alexander I. Titov
We analyze a possible manifestation of f_1-trajectory in elastic J/psi photoproduction at high energy and large momentum transfer. Inspite of the small contribution of f_1-trajecto…