Shapes and sizes from non-identical-particle correlations

Pratt, Scott

doi:10.1590/s0103-97332007000600003

Cited by 6 publications

(5 citation statements)

References 9 publications

(11 reference statements)

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“…For identical particles (π 0 π 0 in our case) this is discussed usually in the context of Bose-Einstein correlations. The nonidentical particle correlations (π + π − in our case) is less popular but also very interesting [29,30]. To form the resonance the two pions must be produced in the ππ invariant mass window corresponding to the f 2 (1270) meson and close in space one to each other.…”

Section: K T -Factorization Approachmentioning

confidence: 99%

Production of $f_2(1270)$ meson in $pp$ collisions at the LHC via gluon-gluon fusion in the $k_t$-factorization approach

Lebiedowicz,

Szczurek

2020

Preprint

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We calculate inclusive cross section for f 2 (1270) tensor meson production via color singlet gluon-gluon fusion in the k t -factorization approach with unintegrated gluon distribution functions (UGDFs). The process may be potentially interesting in the context of searches for saturation effects. The energy-momentum tensor, equivalent to helicity-2 coupling, and helicity-0 coupling are used for the g * g * → f 2 (1270) vertex. Two somewhat different parametrizations of helicity-2 and helicity-0 tensorial structure from the literature are used in our calculations. Some parameters are extracted from γγ → f 2 (1270) → ππ reactions. Different modern UGDFs from the literature are used. The results strongly depend on the parametrization of the g * g * → f 2 (1270) form factor. Our results for transverse momentum distributions of f 2 are compared to preliminary ALICE data. We can obtain agreement with the data only at larger f 2 (1270) transverse momenta only for some parametrizations of the g * g * → f 2 (1270) form factor. No obvious sign of the onset of saturation is possible. At low transverse momenta one needs to include also the ππ finalstate rescattering. The agreement with the ALICE data can be obtained by adjusting probability of formation and survival of f 2 (1270) in a harsh quark-gluon and multipion environment. The pomeron-pomeron fusion mechanism is discussed in addition and results are quantified.

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Section: K T -Factorization Approachmentioning

confidence: 99%

Production of $f_2(1270)$ meson in $pp$ collisions at the LHC via gluon-gluon fusion in the $k_t$-factorization approach

Lebiedowicz,

Szczurek

2020

Preprint

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“…In the current analysis, the second order polynomial, D(Q) = 1 + aQ + bQ 2 , was used for estimation of the baseline distribution. The momentum correlations of particles emitted at nuclear distances are also influenced by the effect of final-state interaction (FSI), Coulomb and strong interactions [25][26][27][28]. For identical kaons, the effect of strong interactions is negligible [29].…”

Section: Correlation Femtoscopymentioning

confidence: 99%

The transverse momentum dependence of charged kaon Bose-Einstein correlations in the SELEX experiment

Nigmatkulov,

Ponosov,

Akgun

et al. 2015

Preprint

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We report on the measurement of the one-dimensional charged kaon correlation functions using 600 GeV/c Σ − , π − and 540 GeV/c p beams from the SELEX (E781) experiment at the Fermilab Tevatron. K ± K ± correlation functions are studied for three transverse pair momentum, k T , ranges and parameterized by a Gaussian form. The emission source radii, R, and the correlation strength, λ, are extracted. The analysis shows a decrease of the source radii with increasing kaon transverse pair momentum for all beam types.

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“…which are interpreted as a probability to emit a particle (a pair of particles) from a given space-time point with a given momentum. With this definition one might substitute S AB for P 2 and S A for P 1 in (11). Such a correlation function is a 14-dimensional object (7 independent components per particle: 4 space-time and 3 momenta).…”

Section: Non-identical Particle Femtoscopy Formalismmentioning

confidence: 99%

“…Initially it was developed for analyzing the two-particle correlation arising from the wave-function symmetrization for pairs of identical particles [3] and was similar in mathematical framework to the "HBT interferometry" used in astronomy [4][5][6]. Later it was realized that similar correlations arise due to the Final State Interactions (Coulomb and Strong) between particles that are not necessarily identical [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Nonidentical-particle femtoscopy atsNN=200GeV in hydrodynamics with statistical hadronization

Kisiel

2010

Phys. Rev. C

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Non-identical particle femtoscopy probes not only the size of the emitting system, but also the emission asymmetries between particles of different mass, which are intimately related with the collective behavior of matter. We apply the technique to the simulations from the THERMINATOR+Lhyquid model of the heavy-ion collisions at √ sNN = 200 GeV. We present predictions for all pairwise combinations of pions, kaons, and protons, and discuss their interpretation. We show that kaon and proton distributions are strongly influenced by flow: the source gets smaller and shifted to the outside with growing pT , while for pions the shift is significantly smaller, producing an emission asymmetry. We explain how particles coming from decays of hadronic resonances enhance the asymmetry signal coming from flow, contrary to naive expectations. Emphasis is put on extracting this unique information about collective behavior of matter from the non-identical particle correlations. We also present, in detail, the technical aspects of the non-identical particle femtoscopy technique applied to data from the heavy-ion collisions. We list the sources of systematic errors coming from the method itself and the usual assumptions. We describe robust analysis methods and discuss their limitations.

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Shapes and sizes from non-identical-particle correlations

Cited by 6 publications

References 9 publications

Production of $f_2(1270)$ meson in $pp$ collisions at the LHC via gluon-gluon fusion in the $k_t$-factorization approach

Production of $f_2(1270)$ meson in $pp$ collisions at the LHC via gluon-gluon fusion in the $k_t$-factorization approach

The transverse momentum dependence of charged kaon Bose-Einstein correlations in the SELEX experiment

Nonidentical-particle femtoscopy atsNN=200GeV in hydrodynamics with statistical hadronization

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