SwePub
Sök i SwePub databas

  Extended search

Träfflista för sökning "WFRF:(Paoloni E.) "

Search: WFRF:(Paoloni E.)

  • Result 1-50 of 51
Sort/group result
   
EnumerationReferenceCoverFind
1.
  • Aad, G., et al. (author)
  • 2011
  • swepub:Mat__t (peer-reviewed)
  •  
2.
  • Aad, G., et al. (author)
  • 2012
  • Journal article (peer-reviewed)
  •  
3.
  • Aad, G., et al. (author)
  • 2011
  • swepub:Mat__t (peer-reviewed)
  •  
4.
  • Aad, G., et al. (author)
  • 2011
  • swepub:Mat__t (peer-reviewed)
  •  
5.
  • Aad, G., et al. (author)
  • 2011
  • swepub:Mat__t (peer-reviewed)
  •  
6.
  • Aad, G., et al. (author)
  • 2011
  • swepub:Mat__t (peer-reviewed)
  •  
7.
  • Aad, G., et al. (author)
  • 2011
  • swepub:Mat__t (peer-reviewed)
  •  
8.
  • Aad, G., et al. (author)
  • 2010
  • swepub:Mat__t (peer-reviewed)
  •  
9.
  • Aad, G., et al. (author)
  • 2011
  • swepub:Mat__t (peer-reviewed)
  •  
10.
  • Aad, G., et al. (author)
  • 2011
  • swepub:Mat__t (peer-reviewed)
  •  
11.
  • Aad, G., et al. (author)
  • 2011
  • swepub:Mat__t (peer-reviewed)
  •  
12.
  • Aad, G., et al. (author)
  • 2011
  • swepub:Mat__t (peer-reviewed)
  •  
13.
  • Aad, G., et al. (author)
  • 2011
  • swepub:Mat__t (peer-reviewed)
  •  
14.
  • Aad, G., et al. (author)
  • 2011
  • swepub:Mat__t (peer-reviewed)
  •  
15.
  • Aad, G., et al. (author)
  • 2011
  • swepub:Mat__t (peer-reviewed)
  •  
16.
  • Aad, G., et al. (author)
  • 2010
  • swepub:Mat__t
  •  
17.
  • Aad, G., et al. (author)
  • 2011
  • swepub:Mat__t (peer-reviewed)
  •  
18.
  • Aad, G., et al. (author)
  • 2011
  • swepub:Mat__t (peer-reviewed)
  •  
19.
  • Aad, G., et al. (author)
  • 2011
  • swepub:Mat__t (peer-reviewed)
  •  
20.
  • Aad, G., et al. (author)
  • 2011
  • swepub:Mat__t (peer-reviewed)
  •  
21.
  • Aad, G., et al. (author)
  • 2011
  • swepub:Mat__t (peer-reviewed)
  •  
22.
  • Aad, G., et al. (author)
  • 2011
  • swepub:Mat__t (peer-reviewed)
  •  
23.
  • Aad, G., et al. (author)
  • 2011
  • swepub:Mat__t (peer-reviewed)
  •  
24.
  • Aad, G., et al. (author)
  • 2011
  • swepub:Mat__t (peer-reviewed)
  •  
25.
  • Aad, G., et al. (author)
  • 2011
  • swepub:Mat__t (peer-reviewed)
  •  
26.
  • Aad, G., et al. (author)
  • 2011
  • swepub:Mat__t (peer-reviewed)
  •  
27.
  • Aad, G., et al. (author)
  • 2011
  • swepub:Mat__t (peer-reviewed)
  •  
28.
  • Aad, G., et al. (author)
  • 2011
  • swepub:Mat__t (peer-reviewed)
  •  
29.
  • Aad, G., et al. (author)
  • 2011
  • swepub:Mat__t (peer-reviewed)
  •  
30.
  • Aad, G., et al. (author)
  • 2010
  • swepub:Mat__t
  •  
31.
  • Aad, G., et al. (author)
  • 2011
  • swepub:Mat__t
  •  
32.
  • 2011
  • swepub:Mat__t
  •  
33.
  • Aad, G., et al. (author)
  • 2010
  • swepub:Mat__t
  •  
34.
  • Aad, G., et al. (author)
  • 2010
  • swepub:Mat__t
  •  
35.
  • Schael, S, et al. (author)
  • Precision electroweak measurements on the Z resonance
  • 2006
  • In: Physics Reports. - : Elsevier BV. - 0370-1573 .- 1873-6270. ; 427:5-6, s. 257-454
  • Research review (peer-reviewed)abstract
    • We report on the final electroweak measurements performed with data taken at the Z resonance by the experiments operating at the electron-positron colliders SLC and LEP. The data consist of 17 million Z decays accumulated by the ALEPH, DELPHI, L3 and OPAL experiments at LEP, and 600 thousand Z decays by the SLID experiment using a polarised beam at SLC. The measurements include cross-sections, forward-backward asymmetries and polarised asymmetries. The mass and width of the Z boson, m(Z) and Gamma(Z), and its couplings to fermions, for example the p parameter and the effective electroweak mixing angle for leptons, are precisely measured: m(Z) = 91.1875 +/- 0.0021 GeV, Gamma(Z) = 2.4952 +/- 0.0023 GeV, rho(l) = 1.0050 +/- 0.0010, sin(2)theta(eff)(lept) = 0.23153 +/- 0.00016. The number of light neutrino species is determined to be 2.9840 +/- 0.0082, in agreement with the three observed generations of fundamental fermions. The results are compared to the predictions of the Standard Model (SM). At the Z-pole, electroweak radiative corrections beyond the running of the QED and QCD coupling constants are observed with a significance of five standard deviations, and in agreement with the Standard Model. Of the many Z-pole measurements, the forward-backward asymmetry in b-quark production shows the largest difference with respect to its SM expectation, at the level of 2.8 standard deviations. Through radiative corrections evaluated in the framework of the Standard Model, the Z-pole data are also used to predict the mass of the top quark, m(t) = 173(+10)(+13) GeV, and the mass of the W boson, m(W) = 80.363 +/- 0.032 GeV. These indirect constraints are compared to the direct measurements, providing a stringent test of the SM. Using in addition the direct measurements of m(t) and m(W), the mass of the as yet unobserved SM Higgs boson is predicted with a relative uncertainty of about 50% and found to be less than 285 GeV at 95% confidence level. (c) 2006 Elsevier B.V. All rights reserved.
  •  
36.
  • Ahdida, C., et al. (author)
  • Measurement of the muon flux from 400 GeV/c protons interacting in a thick molybdenum/tungsten target
  • 2020
  • In: European Physical Journal C. - : Springer Science and Business Media LLC. - 1434-6044 .- 1434-6052. ; 80:3
  • Journal article (peer-reviewed)abstract
    • The SHiP experiment is proposed to search for very weakly interacting particles beyond the Standard Model which are produced in a 400 GeV/c proton beam dump at the CERN SPS. About 1011muons per spill will be produced in the dump. To design the experiment such that the muon-induced background is minimized, a precise knowledge of the muon spectrum is required. To validate the muon flux generated by our Pythia and GEANT4 based Monte Carlo simulation (FairShip), we have measured the muon flux emanating from a SHiP-like target at the SPS. This target, consisting of 13 interaction lengths of slabs of molybdenum and tungsten, followed by a 2.4 m iron hadron absorber was placed in the H4 400 GeV/c proton beam line. To identify muons and to measure the momentum spectrum, a spectrometer instrumented with drift tubes and a muon tagger were used. During a 3-week period a dataset for analysis corresponding to (3.27 +/- 0.07)x1011protons on target was recorded. This amounts to approximatively 1% of a SHiP spill.
  •  
37.
  • Ahdida, C., et al. (author)
  • Sensitivity of the SHiP experiment to dark photons decaying to a pair of charged particles
  • 2021
  • In: European Physical Journal C. - : Springer Nature. - 1434-6044 .- 1434-6052. ; 81:5
  • Journal article (peer-reviewed)abstract
    • Dark photons are hypothetical massive vector particles that could mix with ordinary photons. The simplest theoretical model is fully characterised by only two parameters: the mass of the dark photon m(gamma)D and its mixing parameter with the photon, epsilon. The sensitivity of the SHiP detector is reviewed for dark photons in the mass range between 0.002 and 10 GeV. Different productionmechanisms are simulated, with the dark photons decaying to pairs of visible fermions, including both leptons and quarks. Exclusion contours are presented and compared with those of past experiments. The SHiP detector is expected to have a unique sensitivity for m. D ranging between 0.8 and 3.3(-0.5)(+0.2) GeV, and epsilon(2) ranging between 10(-11) and 10(-17).
  •  
38.
  • Ahdida, C., et al. (author)
  • Sensitivity of the SHiP experiment to light dark matter
  • 2021
  • In: Journal of High Energy Physics (JHEP). - : Springer Nature. - 1126-6708 .- 1029-8479. ; :4
  • Journal article (peer-reviewed)abstract
    • Dark matter is a well-established theoretical addition to the Standard Model supported by many observations in modern astrophysics and cosmology. In this context, the existence of weakly interacting massive particles represents an appealing solution to the observed thermal relic in the Universe. Indeed, a large experimental campaign is ongoing for the detection of such particles in the sub-GeV mass range. Adopting the benchmark scenario for light dark matter particles produced in the decay of a dark photon, with αD = 0.1 and mA′ = 3mχ, we study the potential of the SHiP experiment to detect such elusive particles through its Scattering and Neutrino detector (SND). In its 5-years run, corresponding to 2 · 1020 protons on target from the CERN SPS, we find that SHiP will improve the current limits in the mass range for the dark matter from about 1 MeV to 300 MeV. In particular, we show that SHiP will probe the thermal target for Majorana candidates in most of this mass window and even reach the Pseudo-Dirac thermal relic.
  •  
39.
  • Ahdida, C., et al. (author)
  • Track reconstruction and matching between emulsion and silicon pixel detectors for the SHiP-charm experiment
  • 2022
  • In: Journal of Instrumentation. - : IOP Publishing. - 1748-0221. ; 17:3
  • Journal article (peer-reviewed)abstract
    • In July 2018 an optimization run for the proposed charm cross section measurement for SHiP was performed at the CERN SPS. A heavy, moving target instrumented with nuclear emulsion films followed by a silicon pixel tracker was installed in front of the Goliath magnet at the H4 proton beam-line. Behind the magnet, scintillating-fibre, drift-tube and RPC detectors were placed. The purpose of this run was to validate the measurement's feasibility, to develop the required analysis tools and fine-tune the detector layout. In this paper, we present the track reconstruction in the pixel tracker and the track matching with the moving emulsion detector. The pixel detector performed as expected and it is shown that, after proper alignment, a vertex matching rate of 87% is achieved.
  •  
40.
  • Ahdida, C., et al. (author)
  • Fast simulation of muons produced at the SHiP experiment using Generative Adversarial Networks
  • 2019
  • In: Journal of Instrumentation. - : IOP PUBLISHING LTD. - 1748-0221. ; 14
  • Journal article (peer-reviewed)abstract
    • This paper presents a fast approach to simulating muons produced in interactions of the SPS proton beams with the target of the SHiP experiment. The SHIP experiment will be able to search for new long-lived particles produced in a 400 GeV/c SPS proton beam dump and which travel distances between fifty metres and tens of kilometers. The SHiP detector needs to operate under ultra-low background conditions and requires large simulated samples of muon induced background processes. Through the use of Generative Adversarial Networks it is possible to emulate the simulation of the interaction of 400 GeV/c proton beams with the SHiP target, an otherwise computationally intensive process. For the simulation requirements of the SHiP experiment, generative networks are capable of approximating the full simulation of the dense fixed target, offering a speed increase by a factor of O(10(6)). To evaluate the performance of such an approach, comparisons of the distributions of reconstructed muon momenta in SHiP's spectrometer between samples using the full simulation and samples produced through generative models are presented. The methods discussed in this paper can be generalised and applied to modelling any non-discrete multi-dimensional distribution.
  •  
41.
  • Ahdida, C., et al. (author)
  • Sensitivity of the SHiP experiment to Heavy Neutral Leptons
  • 2019
  • In: Journal of High Energy Physics (JHEP). - 1126-6708 .- 1029-8479. ; :4
  • Journal article (peer-reviewed)abstract
    • Heavy Neutral Leptons (HNLs) are hypothetical particles predicted by many extensions of the Standard Model. These particles can, among other things, explain the origin of neutrino masses, generate the observed matter-antimatter asymmetry in the Universe and provide a dark matter candidate. The SHiP experiment will be able to search for HNLs produced in decays of heavy mesons and travelling distances ranging between O(50 m) and tens of kilometers before decaying. We present the sensitivity of the SHiP experiment to a number of HNL's benchmark models and provide a way to calculate the SHiP's sensitivity to HNLs for arbitrary patterns of flavour mixings. The corresponding tools and data files are also made publicly available.
  •  
42.
  • Ahdida, C., et al. (author)
  • The experimental facility for the Search for Hidden Particles at the CERN SPS
  • 2019
  • In: Journal of Instrumentation. - : Institute of Physics Publishing (IOPP). - 1748-0221. ; 14
  • Journal article (peer-reviewed)abstract
    • The Search for Hidden Particles (SHiP) Collaboration has shown that the CERN SPS accelerator with its 400 GeV/c proton beam offers a unique opportunity to explore the Hidden Sector [1-3]. The proposed experiment is an intensity frontier experiment which is capable of searching for hidden particles through both visible decays and through scattering signatures from recoil of electrons or nuclei. The high-intensity experimental facility developed by the SHiP Collaboration is based on a number of key features and developments which provide the possibility of probing a large part of the parameter space for a wide range of models with light long-lived super-weakly interacting particles with masses up to O(10) GeV/c(2) in an environment of extremely clean background conditions. This paper describes the proposal for the experimental facility together with the most important feasibility studies. The paper focuses on the challenging new ideas behind the beam extraction and beam delivery, the proton beam dump, and the suppression of beam-induced background.
  •  
43.
  • Ahdida, C., et al. (author)
  • The magnet of the scattering and neutrino detector for the SHiP experiment at CERN
  • 2020
  • In: Journal of Instrumentation. - 1748-0221. ; 15:01
  • Journal article (peer-reviewed)abstract
    • The Search for Hidden Particles (SHiP) experiment proposal at CERN demands a dedicated dipole magnet for its scattering and neutrino detector. This requires a very large volume to be uniformly magnetized at B > 1.2 T, with constraints regarding the inner instrumented volume as well as the external region, where no massive structures are allowed and only an extremely low stray field is admitted. In this paper we report the main technical challenges and the relevant design options providing a comprehensive design for the magnet of the SHiP Scattering and Neutrino Detector.
  •  
44.
  • Fernandez, J. L. Abelleira, et al. (author)
  • A Large Hadron Electron Collider at CERN
  • 2012
  • In: Journal of Physics G. - : IOP Publishing. - 0954-3899 .- 1361-6471. ; 39:7
  • Journal article (peer-reviewed)
  •  
45.
  • Milstead, David A., et al. (author)
  • The active muon shield in the SHiP experiment
  • 2017
  • In: Journal of Instrumentation. - 1748-0221. ; 12
  • Journal article (peer-reviewed)abstract
    • The SHiP experiment is designed to search for very weakly interacting particles beyond the Standard Model which are produced in a 400 GeV/c proton beam dump at the CERN SPS. An essential task for the experiment is to keep the Standard Model background level to less than 0.1 event after 2 x 10(20) protons on target. In the beam dump, around 10(11) muons will be produced per second. The muon rate in the spectrometer has to be reduced by at least four orders of magnitude to avoid muon-induced combinatorial background. A novel active muon shield is used to magnetically deflect the muons out of the acceptance of the spectrometer. This paper describes the basic principle of such a shield, its optimization and its performance.
  •  
46.
  •  
47.
  • Golosio, B., et al. (author)
  • The FIRST experiment for nuclear fragmentation measurements at GSI
  • 2011
  • In: Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), 2011 IEEE. ; , s. 2277-2280
  • Conference paper (peer-reviewed)abstract
    • Nuclear fragmentation processes are relevant in different fields of physics concerning both basic research and applications. FIRST (Fragmentation of Ions Relevant for Space and Therapy) is an experiment aimed at the measurement of double differential cross sections (DDCS), with respect to kinetic energy and scattering polar angle, of nuclear fragmentation processes relevant for hadron therapy and for space radiation protection applications, in the energy range between 100 and 1000 MeV/u. The experiment was mounted at the GSI laboratories of Darmstadt, in Germany. A first data taking was performed in August 2011, using 400 MeV/u 12C on carbon and gold targets. In this work we present a description of the experimental apparatus and some figures from the data acquisition and from the preliminary work on data analysis
  •  
48.
  • Pleskac, R., et al. (author)
  • The FIRST experiment at GSI
  • 2012
  • In: Nuclear Instruments and Methods in Physics Research Section A. - : Elsevier BV. - 0168-9002 .- 1872-9576. ; 678, s. 130-138
  • Journal article (peer-reviewed)abstract
    • The FIRST (Fragmentation of Ions Relevant for Space and Therapy) experiment at the SIS accelerator of GSl laboratory in Darmstadt has been designed for the measurement of ion fragmentation crosssections at different angles and energies between 100 and 1000 MeV/nucleon. Nuclear fragmentation processes are relevant in several fields of basic research and applied physics and are of particular interest for tumor therapy and for space radiation protection applications. The start of the scientific program of the FIRST experiment was on summer 2011 and was focused on the measurement of 400 MeV/nucleon C-12 beam fragmentation on thin (8 mm) graphite target. The detector is partly based on an already existing setup made of a dipole magnet (ALADiN). a time projection chamber (TP-MUSIC IV), a neutron detector (LAND) and a time of flight scintillator system (TOFWALL). This pre-existing setup has been integrated with newly designed detectors in the Interaction Region, around the carbon target placed in a sample changer. The new detectors are a scintillator Start Counter, a Beam Monitor drift chamber, a silicon Vertex Detector and a Proton Tagger scintillator system optimized for the detection of light fragments emitted at large angles. In this paper we review the experimental setup, then we present the simulation software, the data acquisition system and finally the trigger strategy of the experiment.
  •  
49.
  • Rescigno, R., et al. (author)
  • Performance of the reconstruction algorithms of the FIRST experiment pixel sensors vertex detector
  • 2014
  • In: Nuclear Instruments and Methods in Physics Research Section A. - : Elsevier BV. - 0168-9002 .- 1872-9576. ; 767, s. 34-40
  • Journal article (peer-reviewed)abstract
    • Hadrontherapy treatments use charged particles (e.g. protons and carbon ions) to treat tumors. During a therapeutic treatment with carbon ions, the beam undergoes nuclear fragmentation processes giving rise to significant yields of secondary charged particles. An accurate prediction of these production rates is necessary to estimate precisely the dose deposited into the tumours and the surrounding healthy tissues. Nowadays, a limited set of double differential carbon fragmentation cross-section is available. Experimental data are necessary to benchmark Monte Carlo simulations for their use in hadrontherapy. The purpose of the FIRST experiment is to study nuclear fragmentation processes of ions with kinetic energy in the range from 100 to 1000 MeV/u. Tracks are reconstructed using information from a pixel silicon detector based on the CMOS technology. The performances achieved using this device for hadrontherapy purpose are discussed. For each reconstruction step (clustering, tracking and vertexing), different methods are implemented. The algorithm performances and the accuracy on reconstructed observables are evaluated on the basis of simulated and experimental data.
  •  
50.
  • Toppi, M., et al. (author)
  • Measurement of fragmentation cross sections of C-12 ions on a thin gold target with the FIRST apparatus
  • 2016
  • In: Physical Review C. - 2469-9985 .- 2469-9993. ; 93:6
  • Journal article (peer-reviewed)abstract
    • A detailed knowledge of the light ions interaction processes with matter is of great interest in basic and applied physics. As an example, particle therapy and space radioprotection require highly accurate fragmentation cross-section measurements to develop shielding materials and estimate acute and late health risks for manned missions in space and for treatment planning in particle therapy. The Fragmentation of Ions Relevant for Space and Therapy experiment at the Helmholtz Center for Heavy Ion research (GSI) was designed and built by an international collaboration from France, Germany, Italy, and Spain for studying the collisions of a C-12 ion beam with thin targets. The collaboration's main purpose is to provide the double-differential cross-section measurement of carbon-ion fragmentation at energies that are relevant for both tumor therapy and space radiation protection applications. Fragmentation cross sections of light ions impinging on a wide range of thin targets are also essential to validate the nuclear models implemented in MC simulations that, in such an energy range, fail to reproduce the data with the required accuracy. This paper presents the single differential carbon-ion fragmentation cross sections on a thin gold target, measured as a function of the fragment angle and kinetic energy in the forward angular region (theta less than or similar to 6 degrees), aiming to provide useful data for the benchmarking of the simulation softwares used in light ions fragmentation applications. The C-12 ions used in the measurement were accelerated at the energy of 400 MeV/nucleon by the SIS (heavy ion synchrotron) GSI facility.
  •  
Skapa referenser, mejla, bekava och länka
  • Result 1-50 of 51

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Close

Copy and save the link in order to return to this view