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Ridge regression with random coefficients provides an important alternative to fixed coefficients regression in high dimensional setting when the effects are expected to be small but not zeros. This paper considers estimation and prediction…

机器学习 · 统计学 2023-06-29 Hongzhe Zhang , Hongzhe Li

The local minima (inherent structures) of a system and their associated transition links give rise to a network. Here we consider the topological and distance properties of such a network in the context of spin glasses. We use steepest…

无序系统与神经网络 · 物理学 2009-11-13 Z. Burda , A. Krzywicki , O. C. Martin

We extract the early parton momentum distribution using the STAR Collaboration data of ridge particles associated with a near-side jet in central AuAu collisions at \sqrt{s_{NN}}=200 GeV. The ridge particles are identified as medium partons…

高能物理 - 唯象学 · 物理学 2008-11-04 Cheuk-Yin Wong

We show that the "ridge" phenomenon in the two-particle angular correlation function, as observed by the CMS experiment, can be reproduced by implementing an impact parameter dependent azimuthal correlation of the scattering planes of…

高能物理 - 唯象学 · 物理学 2012-05-17 Sara Alderweireldt , Pierre Van Mechelen

The PHOBOS experiment at RHIC has measured large samples of Au+Au and Cu+Cu collisions using a detector with uniquely large angular acceptance. These data enable studies of particle production over a very wide pseudorapidity interval which…

核实验 · 物理学 2019-08-14 Krzysztof Wozniak

Comparing the respective structures of the correlators defining generalized and transverse momentum dependent parton distributions, one finds possible relations between these two objects. Although it looks like the relations found do not…

高能物理 - 唯象学 · 物理学 2007-11-01 S. Meissner , A. Metz , M. Schlegel , K. Goeke

Positional ordering of a two-dimensional fluid of hard disks is examined in such narrow tubes where only the nearest-neighbor interactions take place. Using the exact transfer-matrix method the transverse and longitudinal pressure…

统计力学 · 物理学 2015-05-30 S. Varga , G. Balló , P. Gurin

The network formed by ridges in a straightened sheet of crumpled paper is studied using a laser profilometer. Square sheets of paper were crumpled into balls, unfolded and their height profile measured. From these profiles the imposed…

软凝聚态物质 · 物理学 2009-11-13 Christian Andre Andresen , Alex Hansen , Jean Schmittbuhl

Recent measurements of two-particle correlations in high-multiplicity p-Pb collisions at $\sqrt{s_{NN}} = 5.02$ TeV revealed a long-range structure (large separation in $\Delta\eta$) at the near- ($\Delta\varphi\simeq0$) and away-side…

核实验 · 物理学 2019-08-13 M. Weber

The dependence of multi-proton correlation functions and cumulants on the acceptance in rapidity and transverse momentum is studied. We find that the preliminary data of various cumulant ratios are consistent, within errors, with rapidity…

核理论 · 物理学 2017-11-22 Adam Bzdak , Volker Koch

Angular correlations between charged trigger and associated particles are measured by the ALICE detector in p-Pb collisions at a nucleon-nucleon centre-of-mass energy of 5.02 TeV for transverse momentum ranges within 0.5 < $p_{\rm T}^{\rm…

核实验 · 物理学 2016-07-04 ALICE Collaboration

We point out that the mixed-event method for two-particle acceptance correction, widely used in particle correlation measurements at RHIC and LHC, is wrong in cases where the single particle pseudorapidity distribution is significantly…

核实验 · 物理学 2014-01-03 Lingshan Xu , Chin-Hao Chen , Fuqiang Wang

We demonstrate that the recent measurement of azimuthally collimated, long range rapidity ("ridge") correlations in $\sqrt{s}=13$ TeV proton-proton (p+p) collisions by the ATLAS collaboration at the LHC are in agreement with expectations…

高能物理 - 唯象学 · 物理学 2016-02-01 Kevin Dusling , Prithwish Tribedy , Raju Venugopalan

Results on two-particle angular correlations for charged particles emitted in proton-proton collisions at center-of-mass energies of 0.9, 2.36, and 7 TeV are presented, using data collected with the CMS detector over a broad range of…

高能物理 - 实验 · 物理学 2012-08-27 CMS Collaboration

Two-particle angular correlations between unidentified charged trigger and associated particles are measured by the ALICE detector in p-Pb collisions at a nucleon-nucleon centre-of-mass energy of 5.02 TeV. The transverse-momentum range 0.7…

核实验 · 物理学 2015-06-08 ALICE Collaboration

We consider diffusion limited aggregation of particles of two different kinds. It is assumed that a particle of one kind may adhere only to another particle of the same kind. The particles aggregate on a linear substrate which consists of…

其他凝聚态物理 · 物理学 2015-05-20 E. B. Postnikov , A. B. Ryabov , A. Loskutov

We report measurements of large-scale two-particle correlations for 200 GeV p-p collisions on momentum components transverse rapidity $y_t$ (pion mass assigned), pseudorapidity $\eta$ and azimuth angle $\phi$. In both transverse $y_t…

高能物理 - 唯象学 · 物理学 2007-05-23 R. J. Porter , T. A. Trainor

We discuss a possible explanation of the double-ridge observation in pPb--collisions at the LHC emphasizing that this double structure in the two-particle correlation function can result from the rotation of the transient state of matter.

核理论 · 物理学 2013-03-15 S. M. Troshin , N. E. Tyurin

The theoretical description of the correlations between observables in two separated rapidity intervals in relativistic nuclear collisions is presented. It is shown, that the event-by-event pt-pt correlation defined as the correlation…

高能物理 - 唯象学 · 物理学 2007-05-23 R. S. Kolevatov , V. V. Vechernin

The problem of continuum percolation in dispersions of rods is reformulated in terms of weighted random geometric graphs. Nodes (or sites or vertices) in the graph represent spatial locations occupied by the centers of the rods. The…

统计力学 · 物理学 2015-09-30 Avik P. Chatterjee , Claudio Grimaldi