Muon Physics in ALICE: The MFT Upgrade Project

The ALICE experiment is dedicated to the study of the quark gluon plasma in heavy-ion collisions at the CERN LHC. The Muon Forward Tracker (MFT) is under consideration by the ALICE experiment to be part of its program of detectors upgrade to be installed during the LHC Long Shutdown 2 (LS2) planned for 2018. Designed as a silicon pixel detector added in the Muon Spectrometer acceptance ($-4.0 < \eta < -2.5$) upstream of the hadron absorber, the MFT will allow a drastic improvement of the measurements that are presently done with the Muon Spectrometer and, in addition, will give access to new measurements that are not possible with the present Muon Spectrometer setup. Motivations and preliminary results are discussed here, concerning the measurement of prompt and displaced charmonia, open heavy flavors, and low mass dimuons in central Pb--Pb collisions at $\sqrt{s_{NN}} = 5.5$ TeV

Light neutral mesons production in p-A collisions at s=27.5\sqrt{s} = 27.5 GeV with the NA60 Experiment

The NA60 experiment has studied low-mass muon pair production in proton-nucleus (p-A) collisions with a system of Be, Cu, In, W, Pb and U targets using a 400 GeV/$c$ proton beam at the CERN SPS. Thanks to the collected data sample of 180\,000 low mass muon pairs, the most precise measurement currently available was performed for the electromagnetic transition form factors of the $\eta$ and $\omega$ mesons. The $\rho$ line shape was quantitatively investigated, and its effective temperature measured for the first time in elementary collisions. The transverse momentum spectra for the $\omega$ and $\phi$ mesons have been studied in the full \pt range accessible, up to 2 GeV/$c$. The cross section ratios $\sigma_\rho/\sigma_\omega$ and $\sigma_\phi/\sigma_\omega$ have been considered in full \pt as a function of the size of the production target. The nuclear dependence of the production cross sections of the $\eta$, $\omega$ and $\phi$ mesons has finally been studied in terms of the power law $\sigma_\mathrm{pA} \propto \mathrm{A}^\alpha$, where the $\alpha$ parameter has been found to increase as a function of \pt.Comment: On behalf of the NA60 Collaboration. arXiv admin note: substantial text overlap with arXiv:1108.097

Low Mass Dimuon Production in p-A Collisions at s=27.5\sqrt{s} = 27.5 GeV with NA60

The NA60 experiment has studied low-mass muon pair production in proton-nucleus collisions with a system of Be, Cu, In, W, Pb and U targets using a 400 GeV/$c$ proton beam at the CERN SPS. The mass spectrum is well described by the superposition of the two-body and Dalitz decays of the light neutral mesons $\eta$, $\rho$, $\omega$, $\eta'$ and $\phi$. A new high-precision measurement of the electromagnetic transition form factors of the $\eta$ and $\omega$ mesons is presented, complemented with a measurement of the temperature parameter of the $\rho$ meson in cold nuclear matter. The \pt spectra for the $\omega$ and $\phi$ mesons are extracted in the full \pt range accessible, up to \pt = 2 GeV/$c$. The nuclear dependence of the production cross sections for the $\eta$, $\omega$ and $\phi$ mesons has been investigated in terms of the power law $\sigma_\mathrm{pA} \propto \mathrm{A}^\alpha$, and the $\alpha$ parameter was studied as a function of \pt

Measurement of the η\eta and ω\omega Dalitz decays transition form factors in p-A collisions at 400 GeV/cc with the NA60 apparatus

The NA60 experiment has studied low-mass muon pairs production in proton-nucleus collisions at 400 GeV/$c$ at the CERN SPS. The mass spectrum is well described by the superposition of the two-body and Dalitz decays of the light neutral mesons $\eta$, $\rho$, $\omega$, $\eta'$ and $\phi$. The large collected statistics allows to isolate the contributions due to the Dalitz decays of the $\eta$ and $\omega$ mesons, from which the electromagnetic transition form factors of the two mesons have been extracted. The found values agree with the previous available measurements, improving their uncertainty thanks to the higher statistics. The results thus confirm the discrepancy with the prediction of the Vector Meson Dominance model in the case of the electromagnetic form factor of the $\omega$ meson

Noncommutative geometry of the quantum clock

We introduce a model of noncommutative geometry that gives rise to the uncertainty relations recently derived from the discussion of a quantum clock. We investigate the dynamics of a free particle in this model from the point of view of doubly special relativity and discuss the geodesic motion in a Schwarzschild background.Comment: 7 pages, version accepted for publication on Phys. Lett. A. A discussion of the motion of a particle in a Schwarzschild background has been adde

Osmanlı Bankası Müzesi açıldı

Taha Toros Arşivi, Dosya No: 114-Müzeler. Not : Gazetenin "Olayların İçinden" köşesinde yayımlanmıştır.İstanbul Kalkınma Ajansı (TR10/14/YEN/0033) İstanbul Development Agency (TR10/14/YEN/0033

The South China Sea and the Building of a National Maritime Culture. A New Chinese Province in the Making

This article investigates the nationalistic rhetoric disseminated by the Chinese political elite regarding the South China Sea, exploring how this political discourse contributed to building a collective consciousness of the sea among Chinese citizens and to creating a new maritime province

Study of Low Mass Dimuon Production in 400 GeV Proton-Nucleus Collisions at the CERN-SPS with the NA60 Apparatus

This thesis reports on the data collected at the CERN SPS in p-A collisions at 400 GeV, with the NA60 apparatus, during the 2004 proton run. NA60 is a fixed target experiment at the CERN SPS accelerator, studying both proton-nucleus and nucleus-nucleus collisions in the dimuonic channel. Data were taken between 2002 and 2004, and the analyses are currently still in progress. The present work focuses on the analysis of the data collected by NA60 during three days within the 2004 run, in collisions between 400 GeV protons and targets of seven different nuclear species. The selection of the data is presented, which allowed to define the final sample of events to be analyzed. Then the transverse momentum spectrum of the phi meson is studied, for each proton-nucleus system. Finally, the average value of the phi's transverse momentum is extracted and studied as a function of the mass number A of the target. The analysis allowed to observe a rising trend of the average transverse momentum of the phi as a function of A, which could be explained in terms of the so-called "Cronin Effect"

Financial Development, Long-Term Finance and the Macroeconomy:The Role of Secondary Markets

The paper develops a dynamic general equilibrium model of financial markets and macroeconomy. In the model, long-term debt is extended to firms in a primary market and then traded in a secondary market among financiers. Two financial frictions that are ex-ante and ex-post with respect to the secondary market trading date raise the cost of debt finance. In stationary equilibrium, while ex-ante frictions are always counterproductive, financing costs that are ex-post could promote macroeconomic growth. I show that a model consistent with the U.S. financial development experience of the last 30 years is likely to exhibit declining ex-post friction