共查询到20条相似文献,搜索用时 62 毫秒
1.
M. Estienne 《Physics of Atomic Nuclei》2008,71(9):1535-1542
The observation of the strong suppression of high-p
t hadrons in heavy-ion collisions at the Relativistic Heavy Ion Collider (RHIC) at BNL has motivated a large experimental program
using hard probes to characterize the deconfined medium created. However, what can be denoted as “leading particle” physics
accessible at RHIC presents some limitations which motivate at higher energy the study of much more penetrating objects: jets.
The gain in center-of-mass energy expected at the Large Hadron Collider (LHC) at CERN will definitively improve our understanding
on how the energy is lost in the system, opening a major new window of study: the physics of jets on an event-by-event basis.
We will concentrate on the expected performance for jet reconstruction in ALICE using the EMCal calorimeter.
(for the ALICE Collaboration)
The text was submitted by the author in English. 相似文献
2.
A. Dainese F. Antinori C. Bombonati M. Lunardon R. Turrisi 《Czechoslovak Journal of Physics》2005,55(12):1631-1634
We present the expected ALICE performance for the measurement of the p
t-differential cross section of electrons from beauty decays in central Pb-Pb collisions at the LHC.
for the ALICE Collaboration
Presented in the Poster Session “Future Experiments and Facilities” at the 18th International Conference “Quark Matter 2005”,
Budapest, Hungary, 4–9 August 2005. 相似文献
3.
D. Elia G. E. Bruno M. Caselle R. A. Fini V. Lenti V. Manzari V. Paticchio R. Santoro G. Anelli M. Burns I. A. Cali M. Campbell S. Ceresa P. Chochula J. Conrad S. Kapusta A. Kluge M. Morel P. Nilsson F. Osmic P. Riedler G. Stefanini C. Torcato de Matos F. Antinori R. Dima D. Fabris M. Lunardon S. Moretto A. Pepato F. Scarlassara G. Segato R. Turrisi G. Viesti A. Badalà F. Librizzi G. S. Pappalardo A. Pulvirenti F. Riggi M. Cinausero E. Fioretto G. Prete L. Vannucci M. Krivda L. Sándor F. Soramel T. Virgili 《Czechoslovak Journal of Physics》2005,55(12):1635-1638
The silicon pixel detector (SPD) comprises the two innermost layers of the inner tracking system oft he ALICE experiment at
LHC. Prototype SPD assemblies have been tested in high-energy proton and pion beams at the CERN SPS. The method used for data
analysis and the most relevant results in relation to detector performance are presented.
Presented in the Poster Session “Future Experiments and Facilities” at the 18th International Conference “Quark Matter 2005”,
Budapest, Hungary, 4–9 August 2005.
On behalf of the Silicon Pixel Detector project in the ALICE Collaboration 相似文献
4.
J. Mercado 《Physics of Particles and Nuclei Letters》2011,8(9):885-887
ALICE is the experiment at the CERN Large Hadron Collider dedicated to study high-energy nuclear collisions which is also
carrying out a proton-proton physics program, thanks to its wide phase-space coverage and good momentum and spatial resolution.
We present first results on two-pion Bose-Einstein correlations in pp collisions at √s = 900 GeV measured with ALICE. An increase of the HBT radius with increasing event multiplicity is observed, in agreement
with previous measurements. However, a strong decrease of the radius with increasing transverse momentum, as observed at RHIC
and at Tevatron, is not evident in our analysis. 相似文献
5.
T. Golling H. S. Hayward P. U. E. Onyisi H. J. Stelzer P. Waller 《The European Physical Journal C - Particles and Fields》2012,72(4):1960
The ATLAS experiment at the Large Hadron Collider has implemented a new system for recording information on detector status
and data quality, and for transmitting this information to users performing physics analysis. This system revolves around
the concept of “defects,” which are well-defined, fine-grained, unambiguous occurrences affecting the quality of recorded
data. The motivation, implementation, and operation of this system is described. 相似文献
6.
S. Y. Choi 《The European Physical Journal C - Particles and Fields》2009,59(2):543-556
The next-generation high-energy facilities, the CERN Large Hadron Collider (LHC) and the prospective e
+
e
− International Linear Collider (ILC), are expected to unravel new structures of matter and forces from the electroweak scale
to the TeV scale. In this report we review the complementary role of LHC and ILC in drawing a comprehensive and high-precision
picture of the mechanism breaking the electroweak symmetries and generating mass, and the unification of forces in the frame
of supersymmetry.
Extended version of Ref. [1] to be published in “Supersymmetry on the Eve of the LHC”, a special volume of European Physical Journal C, Particles and
Fields (EPJC) in memory of Julius Wess. 相似文献
7.
ALICE (A Large Ion Collider Experiment) is the LHC detector designed to measure nucleus-nucleus (AA) collisions where the formation of the Quark Gluon Plasma is expected. The experiment will also study proton-proton (pp) collisions at 14 TeV. Amongst the relevant observables to be investigated in pp collisions, the B-hadron cross-section is particularly interesting since it provides benchmarks for theoretical models and it is mandatory
for understanding heavy flavour production in AA collisions. The performances of the ALICE muon spectrometer to measure B-hadron cross-section in pp collisions at 14 TeV via single muons are presented. 相似文献
8.
Espen Vorland 《Czechoslovak Journal of Physics》1997,47(9):939-944
In 2005 the ALICE experiment will start at the Large Hadron Collider at CERN. It will investigate hot and dense strongly interacting matter formed in heavy ion collisions. The photon spectrometer of the ALICE detector will be designed to identify direct photons. To optimize the detector, simulations will be carried out. 相似文献
9.
Nobuo Yoshida 《Journal of statistical physics》2008,133(6):1033-1058
We consider a discrete-time stochastic growth model on d-dimensional lattice. The growth model describes various interesting examples such as oriented site/bond percolation, directed
polymers in random environment, time discretizations of binary contact path process and the voter model. We study the phase
transition for the growth rate of the “total number of particles” in this framework. The main results are roughly as follows:
If d≥3 and the system is “not too random”, then, with positive probability, the growth rate of the total number of particles is
of the same order as its expectation. If on the other hand, d=1,2, or the system is “random enough”, then the growth rate is slower than its expectation. We also discuss the above phase
transition for the dual processes and its connection to the structure of invariant measures for the model with proper normalization.
Supported in part by JSPS Grant-in-Aid for Scientific Research, Kiban (C) 17540112. 相似文献
10.
Kohei Fujiwara 《Czechoslovak Journal of Physics》2005,55(12):1639-1643
The PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC) is being upgraded with a novel four-layer silicon vertex
tracker. The detector will enhance the physics capabilities of PHENIX in the future phase of the heavy-ion and the polarized
proton-proton programs at RHIC. The silicon vertex tracker will allow the direct measurement of heavy quark production by
identifying displaced decay vertices, and will reconstruct jets with nearly full azimuthal coverage over |η| < 1.2. We are
developing a novel Silicon Pixel Detector for the inner two barrel layers of the silicon vertex tracker. In this paper, the
status of the development is reported.
for the PHENIX collaboration
Presented in the Poster Session “Future Experiments and Facilities” at the 18th International Conference “Quark Matter 2005”,
Budapest, Hungary, 4–9 August 2005. 相似文献
11.
Janusz Kempa Bryan Pattison Ewa Gładysz-Dziaduś Lawrence W. Jones Rauf Mukhamedshin Masanobu Tamada Zbigniew Włodarczyk 《Central European Journal of Physics》2012,10(4):723-741
The cosmic ray emulsion chamber community has reported several unusual phenomena which are also relevant to experiments at the current high-energy accelerators, in particular the Fermilab Tevatron Collider and the CERN Large Hadron Collider (LHC). A summary of the ”Cosmic Rays at Mountain Altitude” workshop held at Plock (Poland, September 2010) is given. 相似文献
12.
Masuo Suzuki 《Journal of statistical physics》1986,43(5-6):883-909
A short review is given concerning the quantum statistical Monte Carlo method based on the equivalence theorem(1) thatd-dimensional quantum systems are mapped onto (d+1)-dimensional classical systems. The convergence property of this approximate tansformation is discussed in detail. Some
applications of this geneal appoach to quantum spin systems are reviewed. A new Monte Carlo method, “thermo field Monte Carlo
method,” is presented, which is an extension of the projection Monte Carlo method at zero temperature to that at finite temperatures.
Invited talk presented at “Frontiers of Quantum Monte Carlo,” Los Alamos National Laboratory, September 3–6, 1985. 相似文献
13.
14.
Hironobu Sakagawa 《Journal of statistical physics》2009,135(3):467-481
We consider the d+1-dimensional effective interface model of gradient type with a quadratic interaction potential and a self-potential. Without
the self-potential, the model coincides with the d-dimensional massless Gaussian field. We show that for an arbitrary repulsive self-potential which can be thought as interaction
of the interface with a “soft wall”, the field is pushed up at least to the same level when the original Gaussian field is
conditioned to be positive everywhere, namely the “hard wall” condition is imposed. 相似文献
15.
A. V. Kosarim B. M. Smirnov M. Capitelli A. Laricchiuta 《Journal of Experimental and Theoretical Physics》2011,113(3):365-375
The moment coupling of an interacting ion and an atom with a 3d-electron shell is analyzed for the ground state of identical atoms and ions where resonant charge exchange proceeds with
transition of a 4s-electron. The interaction of the ion charge with the atom quadrupole moment is important for this system along with the exchange
interactions and spin-orbit interactions inside an isolated atom and an ion. The quadrupole moment for 3d-atoms in the ground states is evaluated. The hierarchy of interactions in a molecular ion is analyzed depending on ion-atom
distances and is compared with the standard Hund scheme. The resonant charge exchange proceeds effectively at separations
corresponding to an intermediate case between cases “a” and “c” of the Hund coupling scheme. 相似文献
16.
We report the first observation of “quasi-Planck” spectra of capillary turbulence on the surface of liquid hydrogen in the
dissipation domain. Capillary waves have been driven by low-frequency random force. We have observed that the frequency spectrum
of surface elevation changes its dependence from power-like 〈|ηω2|〉 ∼ ω−2,8 at middle-frequency domain to “quasi-Planck” distribution ∼e
ω/ω
d
at higher frequencies. The frequency ω
d
is proportional to the boundary frequency between inertial interval and dissipation domain and it is scaled up with the increase
of driving force. 相似文献
17.
The energy gap appearing in the spin-wave spectrum as a result of Bragg scattering by the modulation period q=2π/(d
1+d
2) of a one-dimensional superlattice is observed by the method of spin-wave resonance in Co/Pd multilayer films. It is shown
that this gap is asymmetric: The “positive” deviation is from two to three times greater than the “negative” deviation.
Pis’ma Zh. éksp. Teor. Fiz. 63, No. 12, 938–941 (25 June 1996) 相似文献
18.
G.S. Neugschwandtner R. Schwödiauer S. Bauer-Gogonea S. Bauer 《Applied Physics A: Materials Science & Processing》2000,70(1):1-4
Large piezoelectric d33 coefficients around 600 pC/N are found in corona-charged non-uniform electrets consisting of elastically “soft” (microporous
polytetrafluoroethylene PTFE) and “stiff” (perfluorinated cyclobutene PFCB) polymer layers. The piezoelectric activity of
the two-layer fluoropolymer stack exceeds the d33 coefficient of the ferroelectric ceramic lead zirconate titanate (PZT) by more than a factor of two and that of the ferroelectric
polymer polyvinylidene fluoride (PVDF) by a factor of 20. Soft piezoelectric materials may become interesting for a large
number of sensor and transducer applications, in areas such as security systems, medical diagnostics, and nondestructive testing.
Accepted: 9 November 1999 / Published online: 3 December 1999 相似文献
19.
Miron Ya. Amusia Arkadiy S. Baltenkov Larissa V. Chernysheva 《Central European Journal of Physics》2008,6(1):14-25
We demonstrate rather interesting manifestations of co-existence of resonance features in characteristics of the photoionization
of 3d-electrons in Xe, Cs and Ba endohedral atoms. It is shown that for all of the considered atoms the reflection by the fullerene
shell of photoelectrons produced by the 3d subshell photoionization affects greatly partial photoionization cross-sections of 3d
5/2 and 3d
3/2 levels and respective angular anisotropy parameters, both dipole and non-dipole adding to all of them additional maximums
and minimums. The results obtained demonstrate distinctive differences between the three atoms. The calculations are performed
treating the 3/2 and 5/2 electrons as electrons of different kinds with their spins “up” and “down”. The effect of the C60 shell is accounted for in the frame of the “orange” skin potential model. It is essential that in the considered photon frequency
region the presented resonance features are not affected by the C60polarization.
相似文献
20.
C.-X. Yue L. Zhou S. Yang 《The European Physical Journal C - Particles and Fields》2006,48(1):243-249
We investigate the corrections of the “littlest” Higgs (LH) model and the SU(3) simple group model to single top production at the CERN Large Hadron Collider (LHC). We find that the new gauge bosons WH
± predicted by the LH model can generate significant contributions to single top production via the s-channel process. The correction terms for the tree-level Wqq’ couplings coming from the SU(3) simple group model can give large contributions to the cross sections of the t-channel single top production process. We expect that the effects of the LH model and the SU(3) simple group model on single top production can be detected at the LHC experiments. 相似文献