共查询到20条相似文献,搜索用时 15 毫秒
1.
Ties Behnke 《Pramana》2007,69(5):697-702
In preparation of the experimental program at the international linear collider (ILC), the large detector concept (LDC) is
being developed. The main points of the LDC are a large volume gaseous tracking system, combined with high precision vertex
detector and an extremely granular calorimeter. The main design force behind the LDC is the particle flow concept.
for the LDC Concept Group 相似文献
2.
Klaus Mönig 《Pramana》2007,69(6):1207-1208
The detectors at the ILC are planned to run without hardware trigger. The physics constraints for a pure software trigger
are discussed.
相似文献
3.
Klaus Mönig 《Pramana》2007,69(5):735-741
Forward tracking is an essential part of a detector at the international linear collider (ILC). The requirements for forward
tracking are explained and the proposed solutions in the detector concepts are shown.
相似文献
4.
J. E. Brau O. Igonkina N. Sinev D. Strom C. Baltay W. Emmet H. Neal D. Rabinowitz 《Pramana》2007,69(6):1009-1013
A monolithic CMS pixel detector is under development for an ILC experiment. This chronopixel array provides a time stamp resolution
of one bunch crossing, a critical feature for background suppression. The status of this effort is summarized.
相似文献
5.
John Hauptman 《Pramana》2007,69(6):1037-1046
The 4th concept detector consists of four detector subsystems, a small-pixel vertex detector, a high-resolution TPC, a new
multiple-readout fiber calorimeter and a new dual-solenoid iron-free muon system. We discuss the design of a comprehensive
facility that measures and identifies all partons of the standard model, including hadronic W → jj and Z → jj decays, with high precision and high efficiency. We emphasis here the calorimeter and muon systems.
相似文献
6.
John Hauptman 《Pramana》2007,69(6):1047-1050
We describe a completely new way to reconstruct and identify muons with high efficiency and very high pion rejection in the
4th concept detector. The dual-solenoid magnetic field allows the reconstruction and precision momentum measurement of muons
down to a few GeV (just the energy loss in the 10-λint calorimeter and the coil) and the dual-readout calorimeter provides a new, unique and powerful separation of muons from pions.
We use test beam data for the calorimeter and calculations for the magnetic fields.
相似文献
7.
J. E. Brau R. E. Frey D. Strom M. Breidenbach D. Freytag N. Graf G. Haller R. Herbst J. Jaros T. Nelsen V. Radeka B. Holbook R. Lander M. Tripathi Y. Karyotakis 《Pramana》2007,69(6):1025-1030
A silicon-tungsten calorimeter for silicon detector (SiD) at the International Linear Collider is under development. Recent
progress is summarized.
相似文献
8.
Klaus Mönig 《Pramana》2007,69(6):1181-1184
The photon collider is an option at the ILC. In this note detector issues are discussed that are relevant for the change from
the e
+
e
− mode of the ILC to the γγ mode.
相似文献
9.
K. Buesser 《Pramana》2007,69(6):1129-1132
The recently optimised interaction region of the LDC detector is presented in this paper together with the requirements for
the planned detector hall.
相似文献
10.
In this paper we use current and proposed final doublet magnet technologies to reoptimise the interaction region of the international
linear collider and reduce the power losses. The result is a set of three new final doublet layouts with improved beam transport
properties. The effect of localised power deposition and it’s reduction using tungsten liners are considered.
相似文献
11.
Light scalar top quarks with a small mass difference with respect to the neutralino mass are of particular cosmological interest.
This study uses an iterative discriminant analysis method to optimize the expected selection efficiency at the international
linear collider (ILC).
相似文献
12.
Aldo Penzo 《Pramana》2007,69(6):1075-1078
Measuring the energy of hadronic jets with high precision is essential at present and future colliders, in particular at ILC.
The 4th concept design is built upon calorimetry criteria that result in the DREAM prototype, read-out via two different types
of longitudinal fibers, scintillator and quartz respectively, and therefore capable of determining for each shower the corresponding
electromagnetic fraction, thus eliminating the strong effect of fluctuations in this fraction on the overall energy resolution.
In this respect, 4th is orthogonal to the other three concepts, which rely on particle flow analysis (PFA). The DREAM test-beam
results hold promises for excellent performances, coupled with relatively simple construction and moderate costs, making such
a solution an interesting alternative to the PFA paradigm. The next foreseen steps are to extend the dual-readout principle
to homogeneous calorimeters (with the potential of achieving even better performances) and to tackle another source of fluctuation
in hadronic showers, originating from binding energy losses in nuclear break-up (measuring neutrons of few MeV energy).
on behalf of 4th Concept and DREAM 相似文献
13.
14.
Power loss simulations for the 2, 14, and 20 mrad extraction line designs using the BDSIM toolkit are presented. A preliminary
study on the backgrounds from the beam losses along the extraction line in the case of 20 mrad with high luminosity parameters
is also given.
相似文献
15.
A vertex detector concept of the linear collider flavour identification (LCFI) collaboration, which studies pixel detectors
for heavy quark flavour identification, has been implemented in simulations for c-quark tagging in scalar top studies. The production and decay of scalar top quarks (stops) is particularly interesting for
the development of the vertex detector as only two c-quarks and missing energy (from undetected neutralinos) are produced for light stops. Previous studies investigated the vertex
detector design in scenarios with large mass differences between stop and neutralino, corresponding to large visible energy
in the detector. In this study we investigate the tagging performance dependence on the vertex detector design in a scenario
with small visible energy for the international linear collider (ILC).
相似文献
16.
Software plays an increasingly important role already in the early stages of a large project like the ILC. In international
collaboration a data format for the ILC detector and physics studies has been developed. Building upon this software frameworks
are made available which ease the event reconstruction and analysis.
相似文献
17.
In this paper we investigate the effects of the large extra dimensions on the two processes
e+e-→
H0Z0Z0 and e+e-→ H0Z0Z0 at linear colliders in both unpolarized and polarized collision modes. We
find that the virtual Kaluza-Klein graviton exchange can significantly enhance the cross section from their standard model expectations for these two processes. The results show that the
LED effect on the process
e+e-→
H0Z0Z0
allows the observation limits on
the effective scale MS to be probed up to 9.75 TeV and 10.1 TeV
in the unpolarized and
+-(λe+=1/2,
λe-=-1/2) polarized beam collision modes (with
Pe+=0.6,
Pe-=0.8), respectively. For the process
e+e-→
H0Z0Z0, these limits on MS can be
probed up to 6.06 TeV and 6.38 TeV in the unpolarized and polarized
collision modes separately. We find that the λe+=1/2,
λe-=-1/2 polarization collision mode in both
process e+e-→ H0Z0Z0 and e+e-→ H0Z0Z0
may provide a possibility to improve the
sensitivity in probing the LED effects. 相似文献
18.
S. Heinemeyer 《Pramana》2007,69(5):727-733
The international linear e
+
e
− collider (ILC) could go into operation in the second half of the upcoming decade. Experimental analyses and theory calculations
for the physics at the ILC are currently performed. We review recent progress, as presented at the LCWS06 in Bangalore, India,
in the fields of Higgs boson physics and top/QCD. Also the area of loop calculations, necessary to achieve the required theory
precision, is included.
相似文献
19.
J. Kovermann A. Stahl A. A. Mikhailichenko D. Scott G. A. Moortgat-Pick V. Gharibyan P. Pahl R. Pöschl K. P. Schüler K. Laihem S. Riemann A. Schälicke R. Dollan H. Kolanoski T. Lohse T. Schweizer K. T. McDonald Y. Batygin V. Bharadwaj G. Bower F. -J. Decker C. Hast R. Iverson J. C. Sheppard Z. Szalata D. Walz A. Weidemann G. Alexander E. Reinherz-Aronis S. Berridge W. Bugg Y. Efrimenko 《Pramana》2007,69(6):1165-1169
A longitudinal polarized positron beam is foreseen for the international linear collider (ILC). A proof-of-principle experiment
has been performed in the final focus test beam at SLAC to demonstrate the production of polarized positrons for implementation
at the ILC. The E166 experiment uses a 1 m long helical undulator in a 46.6 GeV electron beam to produce a few MeV photons
with a high degree of circular polarization. These photons are then converted in a thin target to generate longitudinally
polarized e
+ and e
−. The positron polarization is measured using a Compton transmission polarimeter. The data analysis has shown asymmetries
in the expected vicinity of 3.4% and ∼1% for photons and positrons respectively and the expected positron longitudinal polarization
is covering a range from 50% to 90%.
相似文献