Transverse-longitudinal HBT correlations in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:mi>p</mml:mi><mml:mover accent="true"><mml:mi>p</mml:mi><mml:mo>¯</mml:mo></mml:mover></mml:math> collisions at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si2.gif" overflow="scroll"><mml:msqrt><mml:mi>s</mml:mi></mml:msqrt><mml:mo>=</mml:mo><mml:mn>630</mml:mn><mml:mtext> GeV</mml:mtext></mml:math>

Eggers, H. C.; Buschbeck, B.; October, F.J.

doi:10.1016/j.physletb.2006.03.015

Cited by 3 publications

(5 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In Ref. [3], for example, we found that the regions of intermediate |q| dominated the shape and quality of various fits.…”

Section: Discussionmentioning

confidence: 83%

“…(This is not the two-dimensional decomposition into (q t , q l ) used in some experimental HBT analyses [2,3], because q t = (q 2 o + q 2 s ) 1/2 is always positive, while (q 1 , q 2 ) in our twodimensional example can be positive or negative.) For the two-dimensional decomposition, the covariance matrix λ = λ 11 λ 12 λ 12 λ 22 (7) has the inverse…”

Section: Reference Distributionmentioning

confidence: 87%

“…where we have introduced the notation [3] to indicate the number of index partitions, and therefore terms, of a given combination of κ's. The relations of order 4, 5 and 6, which we will need in a moment, are [15] (20)…”

Section: A Derivationmentioning

confidence: 99%

“…While C 2 data can be visualized and quantified reasonably well in two dimensions [2,3], it is harder to quantify three-or higher-dimensional correlations. Projections onto marginal distributions are inadequate [4], while sets of conditional distributions ("slices") require many plots and miss cross-slice features.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

HBT shape analysis with q -cumulants

Eggers

Lipa

2007

Braz. J. Phys.

View full text Add to dashboard Cite

Taking up and extending earlier suggestions, we show how two-and three-dimensional shapes of secondorder HBT correlations can be described in a multivariate Edgeworth expansion around Gaussian ellipsoids, with expansion coefficients, identified as the cumulants of pair momentum difference q, acting as shape parameters. Off-diagonal terms dominate both the character and magnitude of shapes. Cumulants can be measured directly and so the shape analysis has no need for fitting.

show abstract

“…In Ref. [3], for example, we found that the regions of intermediate |q| dominated the shape and quality of various fits.…”

Section: Discussionmentioning

confidence: 83%

Section: Reference Distributionmentioning

confidence: 87%

Section: A Derivationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

HBT shape analysis with q -cumulants

Eggers

Lipa

2007

Braz. J. Phys.

View full text Add to dashboard Cite

show abstract

“…There are too many parameters to extract a unique set of best-fit values in the double-Gaussian formula. We use a procedure of the two-scale approach which assumes that equation (1) can be separated into two scales to fit the correlation data by a cut of the relative momentum difference q cut [16]. First, we fit the correlation data, of which the relative momentum differences of the bins are larger than a cutoff ( > q q o c u t , > q q s c u t , and > q q l c u t ), by the front half of equation (1), which ignores the cross term and only consists of the first and second terms to extract a set of the fitting parameters, λ C , R oC , R sC , and R lC .…”

Section: Double-gaussian Parametrization With a Two-scale Approachmentioning

confidence: 99%

Effect of partonic cascade on two-pion HBT parameters of the core-halo source in relativistic heavy-ion collisions

Zhang¹,

Zhang²,

He³

et al. 2014

J. Phys. G: Nucl. Part. Phys.

View full text Add to dashboard Cite

Using a multi-phase transport (AMPT) model, we investigate the effect of partonic cascade on two-pion HBT parameters of the core-halo source in relativistic heavy-ion collisions. The evolution time as a function of the partonic cross section for Au+Au central collisions at = s 200 NNGeV shows that the evolution time of the pion emission source is decreased with an increasing partonic cross section, and the drop is due to the evolution time of the core. The partonic cascade with a larger cross section leads to a shorter lifetime of the source.

show abstract

Internal Cumulants for Femtoscopy with Fixed Charged Multiplicity

Eggers

Buschbeck

2013

Advances in High Energy Physics

Self Cite

View full text Add to dashboard Cite

A detailed understanding of all effects and influences on higher-order correlations is essential. At low charged multiplicity, the effect of a nonpoissonian multiplicity distribution can significantly distort correlations. Evidently, the reference samples with respect to which correlations are measured should yield a null result in the absence of correlations. We show how the careful specification of desired properties necessarily leads to an average-of-multinomials reference sample. The resulting internal cumulants and their averaging over several multiplicities fulfil all requirements of correctly taking into account nonpoissonian multiplicity distributions as well as yielding a null result for uncorrelated fixed-N samples. Various correction factors are shown to be approximations at best. Careful rederivation of statistical variances and covariances within the frequentist approach yields errors for cumulants that differ from those used so far. We finally briefly discuss the implementation of the analysis through a multiple event buffer algorithm.

show abstract

Transverse-longitudinal HBT correlations in pp¯ collisions at s=630 GeV

Cited by 3 publications

References 22 publications

HBT shape analysis with q -cumulants

HBT shape analysis with q -cumulants

Effect of partonic cascade on two-pion HBT parameters of the core-halo source in relativistic heavy-ion collisions

Internal Cumulants for Femtoscopy with Fixed Charged Multiplicity

Contact Info

Product

Resources

About