arXiv: Nuclear Experiment
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An analysis of the energy spectra of protons emitted in reactions of 47 MeV/u projectiles with Sn and Au targets provides evidence for high momentum tails in the intrinsic momenta spectra of the projectiles. These high momentum spectra decrease with wavenumber kat a rate proportional to 1/k^4 We suggest that additional experiments could provide a more refined value for the value of the power law exponent.
#1S. E.A. Orrigo (University of Valencia)H-Index: 7
#2J. L. TainH-Index: 35
Last. A. TolosaH-Index: 3
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We have performed a long-term measurement of the neutron flux with the High Efficiency Neutron Spectrometry Array HENSA in the Hall A of the Canfranc Underground Laboratory. The Hall A measurement campaign lasted from October 2019 to March 2021, demonstrating an excellent stability of the HENSA setup. Preliminary results on the neutron flux from this campaign are presented for the first time. In Phase 1 (113 live days) a total neutron flux of 1.66(2) \times0^{-5}cm^{-2}s^{-1}is obtai...
We present an analysis on the heavy flavor hadron decay electrons with charm and beauty contributions decomposed via a data driven method in p+p and Pb+Pb collisions at \sqrt{s_{\mathrm{NN}}}= 5.02 TeV at LHC. The transverse momentum p_{\mathrm{T}}spectra, nuclear modification factor R_{\mathrm{AA}}and azimuthal anisotropic flow v_2distributions of electrons from charm and beauty decays are obtained. We find that the electron R_{\mathrm{AA}}from charm ($R_{\mathrm{AA}}^{\mathrm{c\...
#1Axel Schmidt (GW: George Washington University)H-Index: 10
Measurements of the proton's form factor ratio made with polarization transfer show a striking discrepancy relative to the ratio extracted from unpolarized elastic electron-proton scattering cross sections. One hypothesis is that the discrepancy is caused by hard two-photon exchange (TPE), a typically neglected radiative correction that may bias the two approaches differently. This hypothesis has been challenging to confirm. Theoretical estimates of TPE are model-dependent, and recent experiment...
#1J. L. Rodriguez-Sanchez (University of Santiago de Compostela)H-Index: 12
#2J. BenlliureH-Index: 55
Last. J. S. WinfieldH-Index: 28
view all 29 authors...
The fragment separator FRS has been for the first time used to measure the (n,p) and (p,n)-type isobaric charge-exchange cross sections of stable 112,124Sn isotopes accelerated at 1A GeV with an uncertainty of 3% and to separate quasi-elastic and inelastic components in the missing-energy spectra of the ejectiles. The inelastic contribution can be associated to the excitation of isobar Delta(1232) resonances and to the pion emission in s-wave, both in the target and projectile nuclei, while the ...
#1N. G. PeresadkoH-Index: 16
#2A. A. ZaitsevH-Index: 4
Last. P. I. Zarubin (JINR: Joint Institute for Nuclear Research)H-Index: 12
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This article is dedicated to the results of early measuring fragmentation of relativistic ^{16}, ^{22}e, ^{28}i, and ^{197}u nuclei in a nuclear track emulsion. It has been found that there is a contribution of the unstable ^8e nucleus decays to \alphaparticle multiplicities. These renewed measurements of nuclear track emulsion exposed to ^{84}r nuclei at the energy of 950 MeV per nucleon have been analyzed and given below.
#1Shih-Chieh Liu (Purdue University)
#2D.S. Koltick (Purdue University)H-Index: 40
Last. Thomas Ward (LANL: Los Alamos National Laboratory)
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Unexplained variations of the decay rate for weak interaction decays such as \beta^{\pm}decay, electron capture, as well as strong interaction \alphadecay have been reported. Some researcher interpreted these variations as caused by an unexplained fundamental interaction. The purpose of the paper is to review decay rate parameter variations experiments and place them into a common comparable context and to make decay parameter measurements at the level of 10^{-5}in the presences of an a...
#1Leah BroussardH-Index: 16
#2J. L. BarrowH-Index: 14
Last. S. VavraH-Index: 2
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Despite continued improvements in precision, an unexplained >4\,\sigmadiscrepancy persists between ``beam'' and ``bottle'' measurements of the neutron lifetime. A new model proposed that conversions of neutrons into mirror neutrons can increase the apparent neutron lifetime by 1\%via a small mass difference \Delta{m}inside the 4.6\,Tmagnetic field of the Beam Lifetime experiment. A search for neutron conversions in a 6.6\, magnetic field was performed at the Spallation Neutron Sou...
#1U. AcharyaH-Index: 5
#2A. AdareH-Index: 66
Last. L. ZouH-Index: 21
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The PHENIX collaboration presents a systematic study of \pi^0production from p+p p+l, p+u, d+u, and ^{3}e+u collisions at \sqrt{s_{_{NN}}}=200GeV. Measurements were performed with different centrality selections as well as the total inelastic, 0%--100%, selection for all collision systems. For 0%--100% collisions, the nuclear modification factors, R_{xA} are consistent with unity for p_Tabove 8 GeV/c but exhibit an enhancement in peripheral collisions a...
The NA61/SHINE strong interaction programme aims to explore the phase diagram of the strongly interacting matter. The main physics goals are the study of the onset of deconfinement and the search for the critical point of the strongly interacting matter. These goals are pursued by performing a scan in beam momentum (13A -- 158A GeV/c) and size of colliding system (p+p, p+Pb, Be+Be, Ar+Sc, Xe+La, Pb+Pb). This contribution presents new results on system size and energy dependence of multiplicity a...
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