p-dependent multiplicity fluctuations from PCA and initial conditions
نویسندگان
چکیده
We present a Principal Component Analysis for hydrodynamic simulation and compare with CMS experimental data. While the results are reasonable anisotropic flow, multiplicity fluctuations they qualitatively different. argue that this is due to too large transverse momentum ($p_T$) $N-p_T$ covariance in than seen experimentally. In turn related initial size fluctuations.
منابع مشابه
Initial Conditions, Inflation, and Fluctuations
A s you know, four main bodies of evidence affirm the big bang: the dark sky, Hubble expansion, element abundances, and cosmic microwave background radiation (CMBR). Parts 1-4 of this series briefly examined these topics. [1-4] Here we say a few words about the window the CMBR offers into the very early universe, including a brief but crucial epoch of " inflation. " Recall that the CMBR was fir...
متن کاملQcd Showering and Multiplicity Fluctuations
Multiplicity uctuations are investigated for hadron-hadron collisions (NA22) as a function of the cms opening angle between secondary particles. The angular dependence is very diierent for unlike-charge and like-charge particle combinations. For the latter, factorial moments increase with decreasing opening angle approximately as a power law. The dependence is stronger for central production-an...
متن کاملMultiplicity Fluctuations in Dis
The studies of multiplicity fluctuations in restricted domains of the phase space reveal the nature of particle correlations and are sensitive to the dynamics of the underlying process. The hadronic final state in DIS is a result of a hard partonic scattering at a large momentum transfersQ ≫ Λ. A subsequent parton cascade development down to some QCD cut-off Q0 and fragmentation occuring at sma...
متن کاملMedium-modified average multiplicity and multiplicity fluctuations in jets
The energy evolution of average multiplicities and multiplicity fluctuations in jets produced in heavy-ion collisions is investigated from a toy QCD-inspired model. In this model, we use modified splitting functions accounting for medium-enhanced radiation of gluons by a fast parton which propagates through the quark gluon plasma. The leading contribution of the standard production of soft hadr...
متن کاملMultiplicity Distributions and Charged-neutral Fluctuations
Results from the multiplicity distributions of inclusive photons and charged particles, scaling of particle multiplicities, event-by-event multiplicity fluctuations, and chargedneutral fluctuations in 158·A GeV Pb+Pb collisions are presented and discussed. A scaling of charged particle multiplicity as N part and photons as N 1.12±0.03 part have been observed, indicating violation of naive wound...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nuclear Physics
سال: 2021
ISSN: ['1873-1554', '0375-9474']
DOI: https://doi.org/10.1016/j.nuclphysa.2020.121892