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We numerically calculate two-particle correlation functions of CERN-SPS 158 A GeV Pb+Pb central collisions based on a (3+1)-dimensional relativistic hydrodynamics with a first order phase transition. We analyze the pair momentum dependence…

High Energy Physics - Phenomenology · Physics 2016-09-06 Kenji Morita , Shin Muroya , Hiroki Nakamura , Chiho Nonaka

The quantum regression theorem (QRT) is the most-widely used tool for calculating multitime correlation functions for the assessment of quantum emitters. It is an approximate method based on a Markov assumption for the environmental…

Quantum Physics · Physics 2021-12-20 M. Cosacchi , T. Seidelmann , M. Cygorek , A. Vagov , D. E. Reiter , V. M. Axt

The space-averaged phase-space density and entropy per particle are both fundamental observables which can be extracted from the two-particle correlation functions measured in heavy-ion collisions. Two techniques have been proposed to…

Nuclear Theory · Physics 2009-11-06 David A. Brown , Sergei Y. Panitkin , George F. Bertsch

A theoretical formulation for the two-point correlation function on a light-cone is developed in the redshift space. On the basis of the previous work by Yamamoto & Suto (1999), in which a theoretical formula for the two-point correlation…

Astrophysics · Physics 2009-10-31 Hiroaki Nishioka , Kazuhiro Yamamoto

We report an extension of the source imaging method for analyzing three-dimensional sources from three-dimensional correlations. Our technique consists of expanding the correlation data and the underlying source function in spherical…

Nuclear Theory · Physics 2009-11-11 D. A. Brown , P. Danielewicz , A. Enokizono , M. Heffner , R. Soltz , S. Pratt

We construct a model of cooperative superradiant emission from a highly relativistic multi-particle source. We revise an existing model of the literature for a relativistic two-level particle, and construct from it a Hamiltonian describing…

Quantum Physics · Physics 2023-01-18 Christopher Wyenberg , Fereshteh Rajabi , Martin Houde

We derive a simple formula relating the cross section for light cluster production (defined via a coalescence factor) to the two-proton correlation function measured in heavy-ion collisions. The formula generalises earlier…

Nuclear Theory · Physics 2020-03-03 Kfir Blum , Masahiro Takimoto

Shapes of relative emission sources can be accessed by expanding shapes of correlations at low relative velocities in pair center of mass in Cartesian harmonics. Coefficients of expansion for correlations are related to the respective…

Nuclear Theory · Physics 2007-07-04 P. Danielewicz

We discuss imaging sources from low relative-velocity correlations in heavy-ion reactions. When the correlation is dominated by interference, we can obtain the images by Fourier transforming the correlation function. In the general case, we…

Nuclear Theory · Physics 2007-05-23 P. Danielewicz , D. A. Brown

Typically, optical microscopy uses the wavelike properties of light to image a scene. However, photon arrival times provide more information about emitter properties than the classical intensity alone. Here, we show that the Hanbury Brown…

Quantum Physics · Physics 2020-01-15 Josef G. Worboys , Daniel W. Drumm , Andrew D. Greentree

We investigate what conditions allow us to extract the relative distribution of freeze-out space and time points in an arbitrary reference frame using tomography and source imaging. The source function may be extracted from the two-particle…

Nuclear Theory · Physics 2007-05-23 David A. Brown

We show how to determine the ratio of the transverse velocity of a source to the velocity of emitted particles, using split-bin correlation functions. The technique is to measure $S_2$ and $S_2^{\phi}$, subtract the contributions from the…

High Energy Physics - Phenomenology · Physics 2010-01-06 David Seibert , Kevin Haglin , Charles Gale

We present a new method of transient point source deconvolution for coded-aperture X-Ray detectors. Our method is based upon the calculation of the likelihood function and its interpretation as a probability density for the transient source…

Astrophysics · Physics 2008-02-03 Carlo Graziani , Donald Q. Lamb , Raphael Slawinski

Natural language understanding (NLU) models tend to rely on spurious correlations (i.e., dataset bias) to achieve high performance on in-distribution datasets but poor performance on out-of-distribution ones. Most of the existing debiasing…

Computation and Language · Computer Science 2022-09-14 Shihan Dou , Rui Zheng , Ting Wu , SongYang Gao , Junjie Shan , Qi Zhang , Yueming Wu , Xuanjing Huang

The reliable extraction of information from two-proton correlation functions is a long-standing problem in two-particle interferometry. Recently introduced imaging techniques give one the ability to reconstruct source functions from the…

Nuclear Theory · Physics 2011-07-19 S. Y. Panitkin , D. A. Brown

Recent research has shown a weak convergence - convergence in distribution - of particle filtering methods under certain assumptions. However, some applications of particle filtering methods, such as radiation source localization problems,…

Signal Processing · Electrical Eng. & Systems 2020-04-21 Jared Cook , Ralph C. Smith , Camila Ramirez , Nageswara S. V. Rao

In relativistic heavy-ion physics two-particle correlations provide a very useful tool to investigate the Quark-Gluon Plasma (QGP). This observable is sensitive to several of the properties of the QGP such as resonances, interaction of…

High Energy Physics - Experiment · Physics 2015-06-19 E. Pereira De Oliveira Filho

The Hanbury-Brown Twiss correlation function for two identical particles is studied for systems with cylindrical symmetry. Its shape for small values of the relative momentum is derived in a model independent way. In addition to the usual…

High Energy Physics - Phenomenology · Physics 2022-02-23 Scott Chapman , Pierre Scotto , Ulrich Heinz

We discuss the Yano-Koonin-Podgoretskii (YKP) parametrization of the two-particle correlation function for azimuthally symmetric expanding sources. We derive model-independent expressions for the YKP fit parameters and discuss their…

Nuclear Theory · Physics 2009-10-09 U. Heinz , B. Tomasik , U. A. Wiedemann , Y. -F. Wu

This paper considers the problem of lossy compression for the computation of a function of two correlated sources, both of which are observed at the encoder. Due to presence of observation costs, the encoder is allowed to observe only…

Information Theory · Computer Science 2013-07-22 Xi Liu , Osvaldo Simeone , Elza Erkip