Tue·Mar 10, 2015Tuesday·March 10, 2015

1. 01*

   Cosmogenic-neutron activation of TeO2 and implications for neutrinoless double-beta decay experiments

   Barbara S. Wang🇺🇸 · Eric B. Norman🇺🇸 · Nicholas D. Scielzo🇺🇸 · Alan R. Smith🇺🇸 · Keenan J. Thomas🇺🇸 · Stephen A. Wender🇺🇸

   Flux-averaged cross sections for cosmogenic-neutron activation of natural tellurium were measured using a neutron beam containing neutrons of kinetic energies up to $\sim$800 MeV, and having an energy spectrum similar to that of cosmic-ray neutrons at sea-level. Analysis of the radioisotopes produced reveals that 110mAg will be a dominant contributor to the cosmogenic-activation background in experiments searching for neutrinoless double-beta decay of 130Te, such as CUORE and SNO+. An estimate of the cosmogenic-activation background in the CUORE experiment has been obtained using the results of this measurement and cross-section measurements of proton activation of tellurium. Additionally, the measured cross sections in this work are also compared with results from semi-empirical cross-section calculations.

   nucl-exphysics.ins-detPRC(2015)·21 citations
2. 02*

   Two particle correlations from the energy scan with p+p interactions

   Bartosz Maksiak (for the NA61 Collaboration)🇵🇱

   The NA61/Shine experiment aims to discover the critical point of strongly interacting matter and study the properties of the onset of deconfinement. These goals are to be achieved by performing a two dimensional phase diagram T-mu_B scan by measurements of hadron production properties in proton-proton, proton-nucleus and nucleus-nucleus interactions as a function of collision energy and system size. Close to the phase transition and/or close to the critical point large fluctuations are predicted. In this contribution preliminary results on two-particle correlations in pseudorapidity and azimuthal angle will be presented for p+p interactions at beam momenta: 20, 31, 40, 80 and 158 GeV/c. The NA61/Shine results will be compared with the corresponding data of other experiments and model predictions. A striking evolution with collision energy is observed.

   nucl-exPoS(2015)·9 citations
3. 03*

   Energy Dependence of Moments of Net-Proton and Net-Charge Multiplicity Distributions at STAR

   Xiaofeng Luo (for the STAR Collaboration)🇨🇳

   We present the energy dependence of moments of net-proton and net-charge multiplicity distributions in Au+Au collisions measured by the STAR experiment in the first phase of the Beam Energy Scan (BES) at the Relativistic Heavy Ion Collider (RHIC). By using the time of flight detector for particle identification, the upper transverse momentum ($p_T$) limit for proton and anti-proton is extended from 0.8 GeV/c up to 2 GeV/c. The $p_T$ and rapidity acceptance dependence study for the moments of net-proton distribution show that the larger the acceptance is, the greater the deviation from unity. The most pronounced structure is found in the energy dependence of {\KV} of net-proton distributions from the $0\sim 5$ most central collisions within $0.4<p_T<2$ GeV/c and at mid-rapidity $|y|<0.5$. At energies above 39 GeV, the values of {\KV} are close to unity and for energies below 39 GeV, it shows significant deviation below unity around 19.6 and 27 GeV, then a large increase above unity is observed at 7.7 GeV.

   nucl-exhep-exhep-phnucl-thPoS(2015)·188 citations
4. 04*

   Single neutral pion production by charged-current ${\bar{\nu }}_{\mu }$ interactions on hydrocarbon at $⟨E_{\nu }⟩=$ 3.6 GeV

   T. Le🇺🇸 · J.L. Palomino🇧🇷 · L. Aliaga🇺🇸 · O. Altinok🇺🇸 · A. Bercellie🇺🇸 · A. Bodek🇺🇸 · A. Bravar🇨🇭 · W.K. Brooks🇨🇱 · A. Butkevich🇷🇺 · D.A. Martinez Caicedo🇧🇷 · M.F. Carneiro🇧🇷 · M.E. Christy🇺🇸 and 53 other authors

   Single neutral pion production via muon antineutrino charged-current interactions in plastic scintillator (CH) is studied using the \minerva detector exposed to the NuMI low-energy, wideband antineutrino beam at Fermilab. Measurement of this process constrains models of neutral pion production in nuclei, which is important because the neutral-current analog is a background for ${\bar{\nu }}_e$ appearance oscillation experiments. The differential cross sections for ${\pi }^0$ momentum and production angle, for events with a single observed ${\pi }^0$ and no charged pions, are presented and compared to model predictions. These results comprise the first measurement of the ${\pi }^0$ kinematics for this process.

   ↳ hep-exnucl-exPLB(2015)·87 citations
5. 05*

   Mississippi State Axion Search: A Light Shining though a Wall ALP Search

   Prajwal Mohanmurthy🇺🇸 · Dipangkar Dutta🇺🇸 · Joseph Formaggio🇺🇸 · Nicholas Fowler🇺🇸 · Mikhail Gaerlan🇺🇸 · Yipeng Jiang🇺🇸 · John Madsen🇺🇸 · Noah Oblath🇺🇸 · Adam Powers🇺🇸 · Amy Ray🇺🇸 · Robertson Riehle🇺🇸

   The elegant solutions to the strong CP problem predict the existence of a particle called axion. Thus, the search for axion like particles (ALP) has been an ongoing endeavor. The possibility that these axion like particles couple to photons in presence of magnetic field gives rise to a technique of detecting these particles known as light shining through a wall (LSW). Mississippi State Axion Search (MASS) is an experiment employing the LSW technique in search for axion like particles. The apparatus consists of two radio frequency (RF) cavities, both under the influence of strong magnetic field and separated by a lead wall. While one of the cavities houses a strong RF generator, the other cavity houses the detector systems. The MASS apparatus looks for excesses in RF photons that tunnel through the wall as a signature of candidate axion-like particles. The concept behind the experiment as well as the projected sensitivities are presented here.

   ↳ physics.ins-detnucl-ex0 citations
6. 06*

   Neutron skin and centrality classification in high-energy heavy-ion collisions at the LHC

   Hannu Paukkunen🇫🇮

   The concept of centrality in high-energy nuclear collisions has recently become a subject of an active debate. In particular, the experimental methods to determine the centrality that have given reasonable results for many observables in high-energy lead-lead collisions at the LHC have led to surprising behaviour in the case of proton-lead collisions. In this letter, we discuss the possibility to calibrate the experimental determination of centrality by asymmetries caused by mutually different spatial distributions of protons and neutrons inside the nuclei --- a well-known phenomenon in nuclear physics known as the neutron-skin effect.

   ↳ hep-phhep-exnucl-exnucl-thPLB(2015)·32 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.