1,353 research outputs found
Analyses of third order Bose-Einstein correlation by means of Coulomb wave function
In order to include a correction by the Coulomb interaction in Bose-Einstein
correlations (BEC), the wave function for the Coulomb scattering were
introduced in the quantum optical approach to BEC in the previous work. If we
formulate the amplitude written by Coulomb wave functions according to the
diagram for BEC in the plane wave formulation, the formula for BEC
becomes simpler than that of our previous work. We re-analyze the raw data of
BEC by NA44 and STAR Collaborations by this formula. Results are
compared with the previous ones.Comment: 6pages, 5 figures, talk at Workshop on Particle Correlations and
Femtoscopy, Kromeriz, Czech Republic, August 15-17, 200
Analyses of whole transverse momentum distributions in and collisions by using a modified version of Hagedorn's formula
To describe the transverse distribution of charged hadrons at 1.96 TeV
observed by the CDF collaboration, we propose a formula with two component,
namely, hadron gas distributions and inverse power laws. The data collected at
0.9, 2.76, 7, and 13 TeV by the ALICE, CMS, and ATLAS collaborations are also
analyzed using various models including single component models as well as two
component models. The results by using modified version of Hagedorn's formula
are compared with those by using the two component model proposed by Bylinkin,
Rostovtsev and Ryskin (BRR). Moreover, we show that there is an interesting
interrelation among our the modified version of Hagedorn's formula, a formula
proposed by ATLAS collaboration, and the BRR formula
Asymmetric Leakage from Multiplier and Collision-Based Single-Shot Side-Channel Attack
The single-shot collision attack on RSA proposed by Hanley et al. is studied focusing on the difference between two operands of multiplier. It is shown that how leakage from integer multiplier and long-integer multiplication algorithm can be asymmetric between two operands. The asymmetric leakage is verified with experiments on FPGA and micro-controller platforms. Moreover, we show an experimental result in which success and failure of the attack is determined by the order of operands. Therefore, designing operand order can be a cost-effective countermeasure. Meanwhile we also show a case in which a particular countermeasure becomes ineffective when the asymmetric leakage is considered. In addition to the above main contribution, an extension of the attack by Hanley et al. using the signal-processing technique of Big Mac Attack is presented
An analytic relation between the fractional parameter in the Mittag-Leffler function and the chemical potential in the Bose-Einstein distribution through the analysis of the NASA COBE monopole data
To extend the Bose-Einstein (BE) distribution to fractional order, we turn
our attention to the differential equation, . It is satisfied
with the stationary solution, , of the Kompaneets
equation, where is the constant chemical potential. Setting , we
obtain a linear differential equation for . Then, the Caputo fractional
derivative of order () is introduced in place of the derivative of
, and fractional BE distribution is obtained, where function is
replaced by the Mittag-Leffler (ML) function . Using the integral
representation of the ML function, we obtain a new formula. Based on the
analysis of the NASA COBE monopole data, an identity is
found.Comment: To be published in the proceeding of 6th Internal conference on
mathematical modeling in physical science
Coupling of capillary RBC flow failure with neuronal depolarization
RBC (oxygen-carrier) behaviour in the cerebrocortical microvasculature during K^+^-induced cortical spreading depression (CSD) was examined in urethane-anesthetized male Wistar rats (n=10). The movements of FITC-labeled RBCs in single capillaries in the cortical region were traced with a high-speed camera laser scanning confocal fluorescence microscope and analyzed with Matlab domain software, KEIO-IS2, to obtain the velocities of all labeled RBCs appearing in local capillaries during CSD wave propagation. We found that CSD induced periodic decreases in both RBC number and velocity until RBCs halted or disappeared for 3.3 +/- 2.3 s, and then RBC flow was restored. The RBC flow stall was statistically significant (P < 0.05). During capillary flow failure in association with CSD spread, systemic arterial blood pressure remained unchanged. We conclude that RBCs are transiently sieved and stalled in capillaries during neuronal depolarization, and we suggest that this neuro-capillary coupling involves a hemorheological (viscosity-related) mechanism
Description of \eta-distributions at RHIC energies in terms of a stochastic model
To explain \eta-distributions at RHIC energies we consider the
Ornstein-Uhlenbeck process. To account for hadrons produced in the central
region, we assume existence of third source located there (y \approx 0) in
addition to two sources located at the beam and target rapidities (\pm y_{max}
= \pm \ln[\sqrt{s_{NN}}/m_{N}]). This results in better \chi^2/n.d.f. than
those for only two sources when analysing data.Comment: 4 pages, 4 figures, PTPTE
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