Search for DCC in Relativistic Heavy-Ion Collisions: Possibilities and Limitations

Mohanty, B.; Nayak, T. K.; Viyogi, Y. P.; Mahapatra, D. P.

doi:10.1142/s0217751x04018105

Cited by 9 publications

(18 citation statements)

References 32 publications

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“…For high values of α this reaches close to 100%. For a given α and extraction criteria the purity is higher for photon excess cases than for charge-excess cases as observed earlier [14]. In DCC-II scenario the efficiency is much lower for charge-excess cases than for photon-excess cases.…”

supporting

confidence: 66%

“…1 for various cases. In general the f -distributions shrink inward for both scenarios of DCC formation after π 0 decay [14], the effect being more pronounced for DCC-II. It is clear that in the central part of f -distribution the study of DCC-like fluctuation is difficult due to overwhelming background from the binomial distribution of generic particle production mechanism.…”

mentioning

confidence: 88%

“…In DCC-II scenario the efficiency is much lower for charge-excess cases than for photon-excess cases. Considering limitations due to detector effects [14] it is advantageous to look for photon-excess type charge-neutral fluctuation.…”

mentioning

confidence: 99%

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Event-by-event study of DCC-like fluctuation in ultra-relativistic nuclear collisions

2006

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A method based on sliding window scheme is developed to search for patches in the pseudorapidity-azimuth plane, on an event-by-event basis, having unusual fluctuation in the neutral pion fraction which may arise due to the formation of Disoriented Chiral Condensates (DCC) in high energy nuclear collisions. The efficiency of the method to extract the patches and the purity of the extracted sample are studied for possible experimental situations.

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supporting

confidence: 66%

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confidence: 88%

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Event-by-event study of DCC-like fluctuation in ultra-relativistic nuclear collisions

2006

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“…In this paper, we have used a multiresolution analysis by discrete wavelet transformation (DWT) which has been successfully used in engineering, mathematics and computer science, astrophysics and multiparticle productions, DCC search [4][5][6][7][8][9][10][11]. In our study, we demonstrate that the DWT proves to be very useful in identifying jetlike events in terms of their position and size.…”

Section: Introductionmentioning

confidence: 94%

Identification of jet-like events using a multiplicity detector

Singh

Mohanty

2019

Eur. Phys. J. C

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We present a method for studying the detection of jets in high energy hadronic collisions using multiplicity detector in forward rapidities. Such a study enhances the physics scope of multiplicity detectors at forward rapidities in LHC. At LHC energies the jets may be produced with significant cross section in forward rapidities. A multi resolution wavelet analysis technique can locate the spatial position of jets due to its feature of space-scale locality. The discrete wavelet proves to be very effective in probing physics simultaneously at different locations in phase space and at different scales to identify jet-like events. The key feature this analysis exploits is the difference in particle density in localized regions of the detector due to jet-like and underlying events. We find that this method has a significant sensitivity towards detecting jet position and its size. The jets can be found with the efficiency and purity of the order of 46%.

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“…It is also seen that the difference between VG and its mixed events is much less for the charge-excess case than for the photon-excess case. The PMD-SPMD detector combination is better suited to study the photon-excess fluctuations because the purity of the photon sample in the PMD improves for large f and can reach values up to 85% [22]. For the charge-excess case the charged particle contamination plays a significant role in reducing the purity of the photon sample, which can be as low as 45%, and also introduces unwanted correlations due to charged hits in the SPMD that are simultaneously mis-identified as photon hits in the PMD.…”

mentioning

confidence: 99%