119481484
Open spin chain and open spinning string
In this Letter, we study the open spinning strings and their SYM duals. A new class of folded open spinning strings is found. At planar one-loop level in SYM, by solving the thermodynamic limit of the Bethe ansatz equations for an integrable open spin chain, we find good agreement with string theory predictions for energies of both circular and folded two-spin solutions. A universal relation between the open and closed spinning strings is verified in the spin chain approach.
2902347
Strings in Noncommutative Spacetime
Free bosonic strings in noncommutative spacetime are investigated. The string spectrum is obtained in terms of light-cone quantization. We construct two different models. In the first model the critical dimension is still required to be 26 while only extreme high energy spectrum is modified by noncommutative effect. In the second model, however, the critical dimension is reduced to be less than 26 while low-energy (massless) spectrum only contains degrees of freedom of our four dimensional physics.
119076367
D3-branes in conifold and D5-brane wrapping on a supersymmetric 2-cycle
The paper has been withdraw by author due to a crucial error in equation 10.
16688266
Monte Carlo models: Quo vadimus?
Coherence, multiple scattering and the interplay between soft and hard processes are discussed. These physics phenomena are essential for understanding the nuclear dependences of rapidity density and p{sub T} spectra in high-energy heavy-ion collisions. The RHIC data have shown the onset of hard processes and indications of high p{sub T} spectra suppression due to parton energy loss. Within the pQCD parton model, the combination of azimuthal anisotropy ({nu}{sub 2}) and hadron spectra suppression at large p{sub T} can help one to determine the initial gluon density in heavy-ion collisions at RHIC.
122888332
ASSOCIATED PRODUCTION OF LIGHT PSEUDOSCALAR BOSON η WITH TOP QUARK PAIRS IN THE SLH MODEL AT THE ILC
The light pseudoscalar boson η is the typical particle predicted by the Simplest Little Higgs (SLH) model. In this paper, we investigate some processes of the associated production of a light pseudoscalar boson η with a pair of top quarks in the SLH model at the International Linear Collider (ILC), i.e. and . We find that the cross-sections of these two processes could reach fb in the favorite parameter space in the SLH model, which is consistent with the results of the cross-section of in the standard model and the cross-section of in the minimal supersymmetric standard model. It should be clear that hundreds to thousands of η can be produced at the ILC per year, these processes of are really interesting in testing the standard model and searching the signs of the SLH model.
118443717
The flavor-changing top-charm associated productions at ILC in littlest Higgs model with T parity
The littlest Higgs model with T-parity (LHT) has new flavor-changing (FC) couplings with the Standard Model (SM) quarks, which do not suffer strong constraints from electroweak precision data. So these FC interactions may enhance the cross sections of some flavor-changing neutral-current (FCNC) processes. In this work, we study the FC top-charm associated productions via $e^{-}\gamma$ collision at the ILC. We find that the cross sections are sensitive to the mirror quark masses. With reasonable values of the parameters, the cross sections may reach the detectable level and provide useful information about the relevant parameters in the LHT model, especially setting an upper limit on the mirror quark masses.
121793526
THE FLAVOR-CHANGING BOTTOM AND ANTISTRANGE QUARK PRODUCTION IN THE ONE-GENERATION TECHNICOLOR MODEL AT THE ILC
The Technicolor (TC) model is a dynamical theory without fundamental scalars. Due to the pseudo-Goldstone bosons, there exist some new flavor-changing (FC) couplings in the TC model which can contribute to the production rates of some FC processes. In this paper, we study the production process in the one-generation technicolor model (OGTM) at the ILC, i.e. . We find that the cross section with the OGTM's contributions can be largely enhanced and the signal should be observable at the ILC. Our predictions can be viewed as valid estimates of other TC models. Therefore, the process may provide a unique window for studying the TC theory.
35946336
Minijet scale and energy loss at relativistic energies in event generator models
Author(s): Pop, V. Topor; Gyulassy, M.; Barrette, J.; Gale, C.; Wang, X.N.; Xu, N.; Filimonov, K.