Moscow Institute of Physics and Technology

About: Moscow Institute of Physics and Technology is a education organization based out in Dolgoprudnyy, Russia. It is known for research contribution in the topics: Laser & Plasma. The organization has 8594 authors who have published 16968 publications receiving 246551 citations. The organization is also known as: MIPT & Moscow Institute of Physics and Technology (State University).

First observation of the Zb0(10610) in a Dalitz analysis of Υ(10860)→Υ(nS)π0π0

Abstract: We report the first observation of $\ensuremath{\Upsilon}(10860)\ensuremath{\rightarrow}\ensuremath{\Upsilon}(1,2,3S){\ensuremath{\pi}}^{0}{\ensuremath{\pi}}^{0}$ decays The neutral partner of the ${Z}_{b}^{\ifmmode\pm\else\textpm\fi{}}(10610)$, the ${Z}_{b}^{0}(10610)$ decaying to $\ensuremath{\Upsilon}(2,3S){\ensuremath{\pi}}^{0}$, is observed for the first time with a $65\ensuremath{\sigma}$ significance using a Dalitz analysis of $\ensuremath{\Upsilon}(10860)\ensuremath{\rightarrow}\ensuremath{\Upsilon}(2,3S){\ensuremath{\pi}}^{0}{\ensuremath{\pi}}^{0}$ decays The results are obtained with a $1214\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ data sample collected with the Belle detector at the $\ensuremath{\Upsilon}(10860)$ resonance at the KEKB asymmetric-energy ${e}^{+}{e}^{\ensuremath{-}}$ collider

Parafermionic Liouville field theory and instantons on ALE spaces

Abstract: In this paper we study the correspondence between the $ \widehat{\text{su}}{(n)_k} \oplus \widehat{\text{su}}{(n)_p}/\widehat{\text{su}}{(n)_{{k + p}}} $ coset conformal field theories and $ \mathcal{N} = {2} $ SU(n) gauge theories on $ {\mathbb{R}^4}/{\mathbb{Z}_p} $ . Namely we check the correspondence between the SU(2) Nekrasov partition function on $ {\mathbb{R}^4}/{\mathbb{Z}_4} $ and the conformal blocks of the S 3 parafermion algebra (in S and D modules). We find that they are equal up to the U(1)-factor as it was in all cases of AGT-like relations. Studying the structure of the instanton partition function on $ {\mathbb{R}^4}/{\mathbb{Z}_p} $ we also find some evidence that this correspondence with arbitrary p takes place up to the U(1)-factor.

Prepulse and amplified spontaneous emission effects on the interaction of a petawatt class laser with thin solid targets

Abstract: When a finite contrast petawatt laser pulse irradiates a micron-thick foil, a prepulse (including amplified spontaneous emission) creates a preplasma, where an ultrashort relativistically strong portion of the laser pulse (the main pulse) acquires higher intensity due to relativistic self-focusing and undergoes fast depletion transferring energy to fast electrons. If the preplasma thickness is optimal, the main pulse can reach the target accelerating fast ions more efficiently than an ideal, infinite contrast, laser pulse. A simple analytical model of a target with preplasma formation is developed and the radiation pressure dominant acceleration of ions in this target is predicted. The preplasma formation by a nanosecond prepulse is analyzed with dissipative hydrodynamic simulations. The main pulse interaction with the preplasma is studied with multi-parametric particle-in-cell simulations. The optimal conditions for hundreds of MeV ion acceleration are found with accompanying effects important for diagnostics, including high-order harmonics generation.

The Ep,i–Eiso correlation: type I gamma-ray bursts and the new classification method

Abstract: We present the most extensive sample of 45 type I (short) and 275 type II (long) gamma-ray bursts (GRB) with known redshift to investigate the correlation between the rest frame peak energy, Ep,i and the total isotropic equivalent energy, Eiso of the prompt emission (Amati relation). The Ep,i - Eiso correlation for type I bursts is found to be well-distinguished from the one constructed for type II bursts and has a similar power-law index value, a = 0.4, which possibly indicates the same emission mechanism of both GRB types. We show that the initial pulse complex (IPC) of type I bursts with an extended emission and regular type I bursts follow the same correlation. We obtain similar results for type II bursts associated with Ic supernovae and for regular type II bursts. Three possible outliers from the Ep,i - Eiso correlation for type II subsample are detected. Significant evolution of the Ep,i - Eiso correlation with redshift for type II bursts is not found. We suggest the new classification method, based on the Ep,i - Eiso correlation and introduce two parameters, EH and EHD. EHD is found to be the most reliable parameter for the blind type I - type II classification, which can be used to classify GRBs with no redshift.

Measurement of the B ¯ →xsγ branching fraction with a sum of exclusive decays MEASUREMENT of THE. T. SAITO et al.

Abstract: We use 772×106 BB¯ meson pairs collected at the ?(4S) resonance with the Belle detector to measure the branching fraction for B¯→Xsγ. Our measurement uses a sum-of-exclusives approach in which 38 of the hadronic final states with strangeness equal to +1, denoted by Xs, are reconstructed. The inclusive branching fraction for MXs<2.8GeV/c2, which corresponds to a minimum photon energy of 1.9 GeV, is measured to be B(B¯→Xsγ)=(3.51±0.17±0.33)×10-4, where the first uncertainty is statistical and the second is systematic.