60 research outputs found

    Unified Analyses of Multiplicity Distributions and Bose-Einstein Correlations at the LHC using Double-Stochastic Distributions

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    We analyze data on multiplicity distributions (MD) at Large Hadron Collider (LHC) energies using a double-negative binomial distribution (D-NBD) and double-generalized Glauber-Lachs formula (D-GGL). Moreover, we investigate the Bose-Einstein correlation (BEC) formulas based on these distributions and analyze the BEC data using the parameters obtained by analysis of MDs. From these analyses it can be inferred that the D-GGL formula performs as effectively as the D-NBD. Moreover, our results show that the parameters estimated in MD are related to those contained in the BEC formula.Comment: 8th International Conference on Quarks and Nuclear Physics, To be appeared in JPS Conf. Proc. (2019

    Analyses of multiplicity distributions and Bose-Einstein correlations at the LHC using negative binomial distribution and generalized Glauber-Lachs formula

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    This study aims to analyze the data on multiplicity distributions and Bose-Einstein correlations collected at the LHC by the ATLAS and CMS Collaborations using a double-generalized Glauber-Lachs formula (D-GGL) and double-negative binomial distribution (D-NBD). From this investigation, it can be inferred that the D-GGL formula performs as effectively as the D-NBD. Moreover, our results show that the parameters estimated in multiplicity distributions (MD) (P(n)) are related to those contained in the BEC formula

    Monte Carlo Study on Distortion of the Space-Dimension in COBE Monopole Data

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    A concise explanation of studies on distortion of space-time dimension is briefly introduced. Second we obtain the limits (i.e., bounded values) of the dimensionless chemical potential μ\mu, the Sunyaev--Zeldovich (SZ) effect y and distortion of the space-dimension ε\varepsilon by Monte Carlo (MC) analysis of the parameter set (T, d=3+εd=3+\varepsilon, μ\mu, and yy) in cosmic microwave data assuming that the SZ effect is positive (y>0). In this analysis, the magnitude of the space-dimension d with distortion of the space-dimension ε\varepsilon is defined by d=3+εd=3+\varepsilon. The limits of μ\mu and yy are determined as ∣μ∣<9×10−5(2σ|\mu| < 9\times 10^{-5} (2\sigma) (μ=(−3.9±2.6)×10−5(σ\mu = (-3.9\pm 2.6)\times 10^{-5} (\sigma)), ∣y∣<5×10−6(2σ|y| < 5\times 10^{-6} (2\sigma) (y=(2.0±1.4)×10−6(σy = (2.0\pm 1.4)\times 10^{-6} (\sigma)), while the distortion of the space-dimension is ∣ε∣<6×10−5(2σ|\varepsilon| < 6\times 10^{-5} (2\sigma) (ε=(−0.78±2.50)×10−5(σ\varepsilon = (-0.78\pm 2.50)\times 10^{-5} (\sigma)). The magnitudes of these three estimated limits are ordered as ∣μ∣≥∣ε∣>∣y∣|\mu| \ge |\varepsilon| > |y|. The estimated limit of ∣y∣<5×10−6|y| < 5\times 10^{-6} appears to be related to re-ionization processes occurring at redshift zri∼10z_{ri}\sim 10. We also present data analysis assuming a relativistic SZ effect.Comment: Accepted for publication in Astrophysics and Space Scienc

    Analysis of residual spectra and the monopole spectrum for 3 K blackbody radiation by means of non-extensive thermostatistics

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    We analyze residual spectra of 3 K blackbody radiation (CMB) using non-extensive thermostatistics with a parameter q-1. The limits of |q-1|<1.2x10^{-5} and the temperature fluctuation |delta T|<(1.6-4.3)x10^{-5} are smaller than those by Tsallis et al. Moreover, analyzing the monopole spectrum by a formula including the chemical potential mu, we obtain the limits |q-1|<2.3x10^{-5} and |mu|<1.6x10^{-4}. |q-1| is comparable with the Sunyaev-Zeldovich effect y

    Analyses of third order Bose-Einstein correlation by means of Coulomb wave function

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    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 3π−3\pi^-BEC becomes simpler than that of our previous work. We re-analyze the raw data of 3π−3\pi^-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 ppˉp\bar p and pppp collisions by using a modified version of Hagedorn's formula

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    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

    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

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    To extend the Bose-Einstein (BE) distribution to fractional order, we turn our attention to the differential equation, df/dx=−f−f2df/dx =-f-f^2. It is satisfied with the stationary solution, f(x)=1/(ex+μ−1)f(x)=1/(e^{x+\mu}-1), of the Kompaneets equation, where μ\mu is the constant chemical potential. Setting R=1/fR=1/f, we obtain a linear differential equation for RR. Then, the Caputo fractional derivative of order pp (p>0p>0) is introduced in place of the derivative of xx, and fractional BE distribution is obtained, where function ex{\rm e}^x is replaced by the Mittag-Leffler (ML) function Ep(xp)E_p(x^p). 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 p≃e−μp\simeq e^{-\mu} is found.Comment: To be published in the proceeding of 6th Internal conference on mathematical modeling in physical science
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