Mon·Jun 29, 2015Monday·June 29, 2015

1. 01*

   One-dimensional pion, kaon, and proton femtoscopy in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ =2.76 TeV

   ALICE Collaboration

   The size of the particle emission region in high-energy collisions can be deduced using the femtoscopic correlations of particle pairs at low relative momentum. Such correlations arise due to quantum statistics and Coulomb and strong final state interactions. In this paper, results are presented from femtoscopic analyses of ${\pi }^{\pm }{\pi }^{\pm }$, ${\mathrm{K}}^{\pm }{\mathrm{K}}^{\pm }$, ${\mathrm{K}}_S^0{\mathrm{K}}_S^0$, $\mathrm{pp}$, and $\overline{\mathrm{p}}\overline{\mathrm{p}}$ correlations from Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV by the ALICE experiment at the LHC. One-dimensional radii of the system are extracted from correlation functions in terms of the invariant momentum difference of the pair. The comparison of the measured radii with the predictions from a hydrokinetic model is discussed. The pion and kaon source radii display a monotonic decrease with increasing average pair transverse mass $m_{\mathrm{T}}$ which is consistent with hydrodynamic model predictions for central collisions. The kaon and proton source sizes can be reasonably described by approximate $m_{\mathrm{T}}$-scaling.

   nucl-exhep-exPRC(2015)·127 citations
2. 02*

   Forward-central two-particle correlations in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV

   ALICE Collaboration

   Two-particle angular correlations between trigger particles in the forward pseudorapidity range ($2.5<|\eta |<4.0$) and associated particles in the central range ($|\eta |<1.0$) are measured with the ALICE detector in p-Pb collisions at a nucleon-nucleon centre-of-mass energy of 5.02 TeV. The trigger particles are reconstructed using the muon spectrometer, and the associated particles by the central barrel tracking detectors. In high-multiplicity events, the double-ridge structure, previously discovered in two-particle angular correlations at midrapidity, is found to persist to the pseudorapidity ranges studied in this Letter. The second-order Fourier coefficients for muons in high-multiplicity events are extracted after jet-like correlations from low-multiplicity events have been subtracted. The coefficients are found to have a similar transverse momentum ($p_{\mathrm{T}}$) dependence in p-going (p-Pb) and Pb-going (Pb-p) configurations, with the Pb-going coefficients larger by about $16\pm 6$%, rather independent of $p_{\mathrm{T}}$ within the uncertainties of the measurement. The data are compared with calculations using the AMPT model, which predicts a different $p_{\mathrm{T}}$ and $\eta$ dependence than observed in the data. The results are sensitive to the parent particle $v_2$ and composition of reconstructed muon tracks, where the contribution from heavy flavour decays are expected to dominate at $p_{\mathrm{T}}>2$ GeV/$c$.

   nucl-exhep-exPLB(2016)·98 citations
3. 03*

   Search for critical behavior of strongly interacting matter at the CERN Super Proton Synchrotron

   Marek Gazdzicki🇩🇪 · Peter Seyboth🇩🇪

   History, status and plans of the search for critical behavior of strongly interacting matter created in nucleus-nucleus collisions at the CERN Super Proton Synchrotron is reviewed. In particular, it is expected that the search should answer the question whether the critical point of strongly interacting matter exists and, if it does, where it is located. First, the search strategies are presented and a short introduction is given to expected fluctuation signals and to the quantities used by experiments to detect th The most important background effects are also discussed. Second, relevant experimental results are summarized and discussed. It is intriguing that both the fluctuations of quantities integrated over the full experimental acceptance (event multiplicity and transverse momentum) as well as the bin size dependence of the second factorial moment of pion and proton multiplicities in medium-sized Si+Si collisions at 158A GeV/c suggest critical behaviour of the created matter. These results provide strong motivation for the ongoing systematic scan of the phase diagram by the NA61/SHINE experiment at the SPS and the continuing search at the Brookhaven Relativistic Hadron Collider.

   nucl-exActa Phys.Polon.B(2016)·62 citations
4. 04*

   Electromagnetic modulation of monochromatic neutrino beams

   A. L. Barabanov🇷🇺 · O. A. Titov🇷🇺

   A possibility to produce a modulated monochromatic neutrino beam is discussed. Monochromatic neutrinos can be obtained in electron capture by nuclei of atoms or ions, in particular, by nuclei of hydrogen-like ions. It is shown that monochromatic neutrino beam from such hydrogen-like ions with nuclei of non-zero spin can be modulated because of different probabilities of electron capture from hyperfine states. Modulation arises by means of inducing of electromagnetic transitions between the hyperfine states. Requirements for the hydrogen-like ions with necessary properties are discussed. A list of the appropriate nuclei for such ions is presented.

   ↳ nucl-thhep-phnucl-exEPJA(2015)·5 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.