Forward-backward multiplicity correlations in pp collisions at root s=0.9, 2.76 and 7 TeV
2015
ALICE Collaboration (ukupan broj autora: 975)
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The strength of forward-backward (FB) multiplicity correlations is measured by the ALICE detector in proton-proton (pp) collisions at = 0.9, 2.76 and 7 TeV. The measurement is performed in the central pseudorapidity region (|eta| LT 0.8) for the transverse momentum p (T) GT 0.3 GeV/c. Two separate pseudorapidity windows of width (delta eta) ranging from 0.2 to 0.8 are chosen symmetrically around eta = 0. The multiplicity correlation strength (b (corr)) is studied as a function of the pseudorapidity gap (eta (gap)) between the two windows as well as the width of these windows. The correlation strength is found to decrease with increasing eta (gap) and shows a non-linear increase with delta eta. A sizable increase of the correlation strength with the collision energy, which cannot be explained exclusively by the increase of the mean multiplicity inside the windows, is observed. The correlation coefficient is also measured for multiplicities in different configurations of two azimuthal se...ctors selected within the symmetric FB eta-windows. Two different contributions, the short-range (SR) and the long-range (LR), are observed. The energy dependence of b (corr) is found to be weak for the SR component while it is strong for the LR component. Moreover, the correlation coefficient is studied for particles belonging to various transverse momentum intervals chosen to have the same mean multiplicity. Both SR and LR contributions to b (corr) are found to increase with p (T) in this case. Results are compared to PYTHIA and PHOJET event generators and to a string-based phenomenological model. The observed dependencies of b (corr) add new constraints on phenomenological models.
Кључне речи:
Hadron-Hadron ScatteringИзвор:
Journal of High Energy Physics, 2015, 5Финансирање / пројекти:
- Science and Technology Facilities Council [ST/J000108/1, ST/L005751/1, ST/M00340X/1, ST/M00158X/1, ALICE]
DOI: 10.1007/JHEP05(2015)097
ISSN: 1029-8479
WoS: 000355949100001
Scopus: 2-s2.0-84930225537
Колекције
Институција/група
VinčaTY - JOUR AU - Adam, Jaroslav AU - Milošević, Jovan PY - 2015 UR - https://vinar.vin.bg.ac.rs/handle/123456789/605 AB - The strength of forward-backward (FB) multiplicity correlations is measured by the ALICE detector in proton-proton (pp) collisions at = 0.9, 2.76 and 7 TeV. The measurement is performed in the central pseudorapidity region (|eta| LT 0.8) for the transverse momentum p (T) GT 0.3 GeV/c. Two separate pseudorapidity windows of width (delta eta) ranging from 0.2 to 0.8 are chosen symmetrically around eta = 0. The multiplicity correlation strength (b (corr)) is studied as a function of the pseudorapidity gap (eta (gap)) between the two windows as well as the width of these windows. The correlation strength is found to decrease with increasing eta (gap) and shows a non-linear increase with delta eta. A sizable increase of the correlation strength with the collision energy, which cannot be explained exclusively by the increase of the mean multiplicity inside the windows, is observed. The correlation coefficient is also measured for multiplicities in different configurations of two azimuthal sectors selected within the symmetric FB eta-windows. Two different contributions, the short-range (SR) and the long-range (LR), are observed. The energy dependence of b (corr) is found to be weak for the SR component while it is strong for the LR component. Moreover, the correlation coefficient is studied for particles belonging to various transverse momentum intervals chosen to have the same mean multiplicity. Both SR and LR contributions to b (corr) are found to increase with p (T) in this case. Results are compared to PYTHIA and PHOJET event generators and to a string-based phenomenological model. The observed dependencies of b (corr) add new constraints on phenomenological models. T2 - Journal of High Energy Physics T1 - Forward-backward multiplicity correlations in pp collisions at root s=0.9, 2.76 and 7 TeV IS - 5 DO - 10.1007/JHEP05(2015)097 ER -
@article{ author = "Adam, Jaroslav and Milošević, Jovan", year = "2015", abstract = "The strength of forward-backward (FB) multiplicity correlations is measured by the ALICE detector in proton-proton (pp) collisions at = 0.9, 2.76 and 7 TeV. The measurement is performed in the central pseudorapidity region (|eta| LT 0.8) for the transverse momentum p (T) GT 0.3 GeV/c. Two separate pseudorapidity windows of width (delta eta) ranging from 0.2 to 0.8 are chosen symmetrically around eta = 0. The multiplicity correlation strength (b (corr)) is studied as a function of the pseudorapidity gap (eta (gap)) between the two windows as well as the width of these windows. The correlation strength is found to decrease with increasing eta (gap) and shows a non-linear increase with delta eta. A sizable increase of the correlation strength with the collision energy, which cannot be explained exclusively by the increase of the mean multiplicity inside the windows, is observed. The correlation coefficient is also measured for multiplicities in different configurations of two azimuthal sectors selected within the symmetric FB eta-windows. Two different contributions, the short-range (SR) and the long-range (LR), are observed. The energy dependence of b (corr) is found to be weak for the SR component while it is strong for the LR component. Moreover, the correlation coefficient is studied for particles belonging to various transverse momentum intervals chosen to have the same mean multiplicity. Both SR and LR contributions to b (corr) are found to increase with p (T) in this case. Results are compared to PYTHIA and PHOJET event generators and to a string-based phenomenological model. The observed dependencies of b (corr) add new constraints on phenomenological models.", journal = "Journal of High Energy Physics", title = "Forward-backward multiplicity correlations in pp collisions at root s=0.9, 2.76 and 7 TeV", number = "5", doi = "10.1007/JHEP05(2015)097" }
Adam, J.,& Milošević, J.. (2015). Forward-backward multiplicity correlations in pp collisions at root s=0.9, 2.76 and 7 TeV. in Journal of High Energy Physics(5). https://doi.org/10.1007/JHEP05(2015)097
Adam J, Milošević J. Forward-backward multiplicity correlations in pp collisions at root s=0.9, 2.76 and 7 TeV. in Journal of High Energy Physics. 2015;(5). doi:10.1007/JHEP05(2015)097 .
Adam, Jaroslav, Milošević, Jovan, "Forward-backward multiplicity correlations in pp collisions at root s=0.9, 2.76 and 7 TeV" in Journal of High Energy Physics, no. 5 (2015), https://doi.org/10.1007/JHEP05(2015)097 . .