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2018-01-13
10:16
Exploring the Variability of the Flat Spectrum Radio Source 1633+382. I. Phenomenology of the Light Curves / Algaba, Juan-Carlos ; Lee, Sang-Sung (KASI, DaeJeon ; Gangneung-Wonju Natl. U.) ; Kim, Dae-Won (Gangneung-Wonju Natl. U.) ; Rani, Bindu ; Hodgson, Jeffrey ; Kino, Motoki (KASI, DaeJeon ; Natl. Astron. Observ. of Japan) ; Trippe, Sascha (Unlisted, KR) ; Park, Jong-Ho ; Zhao, Guang-Yao ; Byun, Do-Young et al.
We present multi-frequency simultaneous VLBI radio observations of the flat spectrum radio quasar 1633+382 (4C~38.41) as part of the interferometric monitoring of gamma-ray bright active galactic nuclei (iMOGABA) program combined with additional observations in radio, optical, X-rays and $\gamma-$rays carried out between the period 2012 March - 2015 August. The monitoring of this source reveals a significant long-lived increase in its activity since approximately two years in the radio bands, which correlates with a similar increase on all other bands from sub-millimeter to $\gamma-$rays. [...]
arXiv:1711.10120.- 2018-01-03 - 16 p. - Published in : Astrophys. J. 852 (2018) 30 Preprint: PDF;

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2018-01-13
10:16
Thin and edgeless sensors for ATLAS pixel detector upgrade / Ducourthial, Audrey (Paris U., VI-VII) ; Bomben, Marco (Paris U., VI-VII) ; Calderini, Giovanni (Paris U., VI-VII) ; Marchiori, Giovanni (Paris U., VI-VII) ; D'Eramo, Louis (Paris U., VI-VII) ; Luise, Ilaria (Paris U., VI-VII) ; Bagolini, Alvise (Fond. Bruno Kessler, Povo) ; Boscardin, Maurizio (Fond. Bruno Kessler, Trento ; TIFPA-INFN, Trento) ; Bosisio, Luciano (INFN, Trieste ; Trieste U.) ; Darbo, Giovanni (INFN, Genoa) et al.
To cope with the harsh environment foreseen at the high luminosity conditions of HL- LHC, the ATLAS pixel detector has to be upgraded to be fully efficient with a good granularity, a maximized geometrical acceptance and an high read out rate. LPNHE, FBK and INFN are involved in the development of thin and edgeless planar pixel sensors in which the insensitive area at the border of the sensor is minimized thanks to the active edge technology. [...]
arXiv:1710.03557.- 2017-12-19 - 10 p. - Published in : JINST 12 (2017) C12038 Preprint: PDF;

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2018-01-13
10:16
Intensity limits of the PSI Injector II cyclotron / Kolano, Anna (CERN ; PSI, Villigen ; Huddersfield U.) ; Adelmann, Andreas (PSI, Villigen) ; Barlow, Roger (Huddersfield U.) ; Baumgarten, Christian (PSI, Villigen)
We investigate limits on the current of the PSI Injector II high intensity separate-sector isochronous cyclotron, in its present configuration and after a proposed upgrade. Accelerator Driven Subcritical Reactors, neutron and neutrino experiments, and medical isotope production all benefit from increases in current, even at the ~ 10% level: the PSI cyclotrons provide relevant experience. [...]
arXiv:1707.07970.- 2018-03-21 - 6 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 885 (2018) 54-59 Preprint: PDF;

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2018-01-13
06:24
Transverse single spin asymmetry in $p+p^\uparrow \rightarrow J/\psi +X$ / Godbole, Rohini M. (Bangalore, Indian Inst. Sci.) ; Kaushik, Abhiram (Bangalore, Indian Inst. Sci.) ; Misra, Anuradha (Mumbai U.) ; Rawoot, Vaibhav (Mumbai U.) ; Sonawane, Bipin (Mumbai U.)
We present estimates of transverse single spin asymmetry (TSSA) in $p+p^\uparrow \rightarrow J/\psi+X$ within the colour evaporation model of charmonium production in a generalized parton model (GPM) framework, using the recently obtained best fit parameters for the gluon Sivers function (GSF) extracted from PHENIX data on TSSA in $p+p^\uparrow \to \pi^0+X$ at midrapidity. We calculate asymmetry at $\sqrt{s} = 200$ GeV, and compare the results with PHENIX data on TSSA in the process $p + p^\uparrow \to J/\psi+X$. [...]
arXiv:1703.01991; CERN-TH-2017-047; CERN-TH-2017-047.- 2017-11-28 - 12 p. - Published in : Phys. Rev. D 96 (2017) 096025 Preprint: PDF; External links: 00009 Predictions for $y$-asymmetry obtained using the TMD evolved BV (B) model of GSF~\cite{Boer:2003tx} for all three centre of mass values considered ($\sqrt{s}=115$ GeV, 200 GeV, 500 GeV) with $q_T $ integration range $0\leq q_T\leq1.4$; 00010 Comparison of PHENIX measurements of TSSA in $p + p^\uparrow \rightarrow J/\psi +X$ with predictions obtained using BV models of the GSF~\cite{Boer:2003tx}. Left panel shows comparison with DGLAP evolved BV models and right panel shows the same for TMD evolved BV models.; 00011 Comparison of PHENIX measurements of TSSA in $p + p^\uparrow \rightarrow J/\psi +X$ with predictions obtained using BV models of the GSF~\cite{Boer:2003tx}. Left panel shows comparison with DGLAP evolved BV models and right panel shows the same for TMD evolved BV models.; 00000 Predictions of $q_T $-asymmetry in $p + p^\uparrow \rightarrow J/\psi +X$ at RHIC1 ($\sqrt{s}=$ 200 GeV) energy using DGLAP evolved densities with BV(A), BV(B), DMP-SIDIS1 and DMP-SIDIS2 parameters. Left panel and right panel show $q_T$-asymmetry integrated over the range $2\leq y\leq3$ and $3\leq y\leq3.8$ respectively.; 00002 Asymmetry predictions obtained using the DMP-SIDIS1 GSF~\cite{D'Alesio:2015uta} as a function of $q_T$ (left) and $y$ (right) for all three centre of mass values considered ($\sqrt{s}=115$ GeV, 200 GeV, 500 GeV). Integration ranges for rapidity are $|y|<3.4$ for $\sqrt{s}=115$ GeV, $|y|<3.8$ for $\sqrt{s}=200$ GeV and $|y|<4.8$ for $\sqrt{s}=500$ GeV.; 00006 Predictions for asymmetry as a function of $q_T$ (left panel) and y (right panel) obtained using the DMP-SIDIS2 GSF~\cite{D'Alesio:2015uta} parameters for all three centre of mass values considered ($\sqrt{s}=115$ GeV, 200 GeV, 500 GeV). Integration ranges for rapidity in left panel are $-2.8\leq y \leq 0.2$ for $\sqrt{s}=115$ GeV, $2\leq y \leq 3$ and $3\leq y \leq 3.8 $ for $\sqrt{s}=200$ GeV and $2 \leq y \leq 3 $ and $3 \leq y \leq 4$ for $\sqrt{s}=500$ GeV. In right panel, asymmetry predictions obtained using the DMP-SIDIS2 GSF~\cite{D'Alesio:2015uta} are plotted as a function of $y$ for all three centre of mass values considered ($\sqrt{s}=115$ GeV, 200 GeV, 500 GeV). Integration range for $q_T$ is $ 0 \leq q_T \leq 1.4 $ in all cases. (Asymmetry peaks in negative $y$ region for AFTER@LHC energy as we have used the convention for fixed target experiments as explained in the Section III); 00008 Asymmetry predictions obtained using the TMD evolved BV (B) model of GSF~\cite{Boer:2003tx} as a function of $y$ for all three centre of mass values considered ($\sqrt{s}=115$ GeV, 200 GeV, 500 GeV). Integration ranges for rapidity are $|y|<3.4$ for $\sqrt{s}=115$ GeV, $|y|<3.8$ for $\sqrt{s}=200$ GeV and $|y|<4.8$ for $\sqrt{s}=500$ GeV.; 00003 Predictions for asymmetry as a function of $q_T $ (left panel) and y (right panel) obtained using the DMP-SIDIS1 GSF~\cite{D'Alesio:2015uta} parameters for all the three centre of mass values considered ($\sqrt{s}=115$ GeV, 200 GeV, 500 GeV). Integration ranges for rapidity in left panel are $-2.8\leq y \leq 0.2$ for $\sqrt{s}=115$ GeV, $2\leq y \leq 3$ and $3\leq y \leq 3.8 $ for $\sqrt{s}=200$ GeV and $2 \leq y \leq 3 $ and $3 \leq y \leq 4$ for $\sqrt{s}=500$ GeV. In right panel, asymmetry predictions obtained using the DMP-SIDIS1 GSF~\cite{D'Alesio:2015uta} as a function of $y$ are presented for all three centre of mass values ($\sqrt{s}=115$ GeV, 200 GeV, 500 GeV). Integration range is for $q_T $ is $ 0 \leq q_T \leq 1.4 $ in all cases. (Asymmetry peaks in negative $y$ region for AFTER@LHC energy as we have used the convention for fixed target experiments as explained in the Section III); 00003 Asymmetry predictions obtained using the DMP-SIDIS1 GSF~\cite{D'Alesio:2015uta} as a function of $q_T$ (left) and $y$ (right) for all three centre of mass values considered ($\sqrt{s}=115$ GeV, 200 GeV, 500 GeV). Integration ranges for rapidity are $|y|<3.4$ for $\sqrt{s}=115$ GeV, $|y|<3.8$ for $\sqrt{s}=200$ GeV and $|y|<4.8$ for $\sqrt{s}=500$ GeV.; 00001 Predictions of $q_T $-asymmetry in $p + p^\uparrow \rightarrow J/\psi +X$ at RHIC1 ($\sqrt{s}=$ 200 GeV) energy using DGLAP evolved densities with BV(A), BV(B), DMP-SIDIS1 and DMP-SIDIS2 parameters. Left panel and right panel show $q_T$-asymmetry integrated over the range $2\leq y\leq3$ and $3\leq y\leq3.8$ respectively.; 00005 Predictions for asymmetry as a function of $q_T$ (left panel) and y (right panel) obtained using the DMP-SIDIS2 GSF~\cite{D'Alesio:2015uta} parameters for all three centre of mass values considered ($\sqrt{s}=115$ GeV, 200 GeV, 500 GeV). Integration ranges for rapidity in left panel are $-2.8\leq y \leq 0.2$ for $\sqrt{s}=115$ GeV, $2\leq y \leq 3$ and $3\leq y \leq 3.8 $ for $\sqrt{s}=200$ GeV and $2 \leq y \leq 3 $ and $3 \leq y \leq 4$ for $\sqrt{s}=500$ GeV. In right panel, asymmetry predictions obtained using the DMP-SIDIS2 GSF~\cite{D'Alesio:2015uta} are plotted as a function of $y$ for all three centre of mass values considered ($\sqrt{s}=115$ GeV, 200 GeV, 500 GeV). Integration range for $q_T$ is $ 0 \leq q_T \leq 1.4 $ in all cases. (Asymmetry peaks in negative $y$ region for AFTER@LHC energy as we have used the convention for fixed target experiments as explained in the Section III); 00004 Predictions for asymmetry as a function of $q_T $ (left panel) and y (right panel) obtained using the DMP-SIDIS1 GSF~\cite{D'Alesio:2015uta} parameters for all the three centre of mass values considered ($\sqrt{s}=115$ GeV, 200 GeV, 500 GeV). Integration ranges for rapidity in left panel are $-2.8\leq y \leq 0.2$ for $\sqrt{s}=115$ GeV, $2\leq y \leq 3$ and $3\leq y \leq 3.8 $ for $\sqrt{s}=200$ GeV and $2 \leq y \leq 3 $ and $3 \leq y \leq 4$ for $\sqrt{s}=500$ GeV. In right panel, asymmetry predictions obtained using the DMP-SIDIS1 GSF~\cite{D'Alesio:2015uta} as a function of $y$ are presented for all three centre of mass values ($\sqrt{s}=115$ GeV, 200 GeV, 500 GeV). Integration range is for $q_T $ is $ 0 \leq q_T \leq 1.4 $ in all cases. (Asymmetry peaks in negative $y$ region for AFTER@LHC energy as we have used the convention for fixed target experiments as explained in the Section III); 00011 Comparison of PHENIX measurements~\cite{Adare:2010bd} of TSSA in $p + p^\uparrow \rightarrow J/\psi +X$ with predictions obtained using BV models of the GSF~\cite{Boer:2003tx}. The points for the combined (2006 +2008) data have been offset by 0.01 in $x_F$ for visibility. Left panel shows comparison with DGLAP evolved BV parameters and right panel shows the same for TMD evolved BV parameters.; 00010 Comparison of PHENIX measurements~\cite{Adare:2010bd} of TSSA in $p + p^\uparrow \rightarrow J/\psi +X$ with predictions obtained using the DMP fits, SIDIS1 and SIDIS2~\cite{D'Alesio:2015uta}. The points for the combined (2006 +2008) data have been offset by 0.01 in $x_F$ for visibility. Asymmetry measurements are in the forward (1.2 $<y<$ 2.2), backward (-2.2$<y<$-1.2) and midrapidity ($|y|<0.35$) regions with $0\leq q_T\leq1.4$.; 00012 Comparison of PHENIX measurements~\cite{Adare:2010bd} of TSSA in $p + p^\uparrow \rightarrow J/\psi +X$ with predictions obtained using BV models of the GSF~\cite{Boer:2003tx}. The points for the combined (2006 +2008) data have been offset by 0.01 in $x_F$ for visibility. Left panel shows comparison with DGLAP evolved BV parameters and right panel shows the same for TMD evolved BV parameters.; 00013 Predictions for asymmetry in forward region that would be accessible with the fsPHENIX upgrade~\cite{Barish:2012ha, Aschenauer:2015eha}. Error bars indicate expected statistical errors calculated assuming 1 pb$^{-1}$ of data.; 00007 Comparison of asymmetry predictions obtained using TMD evolved BV models~\cite{Boer:2003tx} with those obtained using DGLAP evolved BV models. Left panel shows the $q_T$-asymmetry integrated over $2\leq y\leq 3$ and right panel shows the $y$-asymmetry integrated over $0\leq q_T\leq1.4$.; 00008 Comparison of asymmetry predictions obtained using TMD evolved BV models~\cite{Boer:2003tx} with those obtained using DGLAP evolved BV models. Left panel shows the $q_T$-asymmetry integrated over $2\leq y\leq 3$ and right panel shows the $y$-asymmetry integrated over $0\leq q_T\leq1.4$.; 00002 Predictions for $y$-asymmetry in $p + p^\uparrow \rightarrow J/\psi +X$ at RHIC1 ($\sqrt{s}=$ 200 GeV) energy using DGLAP evolved densities with BV(A), BV(B), DMP-SIDIS1 and DMP-SIDIS2 parameters. $q_T$ integration range is $0\leq q_T\leq1.4$.; 00000 Predictions of $q_T $-asymmetry in $p + p^\uparrow \rightarrow J/\psi +X$ at RHIC1 ($\sqrt{s}=$ 200 GeV) energy using DGLAP evolved densities with BV(A), BV(B), DMP-SIDIS1 and DMP-SIDIS2 parameters. Left panel and right panel show $q_T$-asymmetry integrated over the range $2\leq y\leq3$ and $3\leq y\leq3.8$ respectively. The plot shows comparison of total asymmetry (including contribution of both the quark and gluon Sivers functions) with that obtained using only the gluon one. These have been labelled `Total' and `Gluon' respectively.; 00001 Predictions of $q_T $-asymmetry in $p + p^\uparrow \rightarrow J/\psi +X$ at RHIC1 ($\sqrt{s}=$ 200 GeV) energy using DGLAP evolved densities with BV(A), BV(B), DMP-SIDIS1 and DMP-SIDIS2 parameters. Left panel and right panel show $q_T$-asymmetry integrated over the range $2\leq y\leq3$ and $3\leq y\leq3.8$ respectively. The plot shows comparison of total asymmetry (including contribution of both the quark and gluon Sivers functions) with that obtained using only the gluon one. These have been labelled `Total' and `Gluon' respectively.; 00010 Comparison of PHENIX measurements~\cite{Adare:2010bd} of TSSA in $p + p^\uparrow \rightarrow J/\psi +X$ with predictions obtained using the DMP fits, SIDIS1 and SIDIS2~\cite{D'Alesio:2015uta}. The points for the combined (2006 +2008) data have been offset by 0.01 in $x_F$ for visibility. Asymmetry measurements are in the forward (1.2 $<y<$ 2.2), backward (-2.2$<y<$-1.2) and midrapidity ($|y|<0.35$) regions with $0\leq q_T\leq1.4$ GeV.; 00011 Comparison of PHENIX measurements~\cite{Adare:2010bd} of TSSA in $p + p^\uparrow \rightarrow J/\psi +X$ with predictions obtained using BV models of the GSF~\cite{Boer:2003tx}. The points for the combined (2006 +2008) data have been offset by 0.01 in $x_F$ for visibility. Left panel shows comparison with DGLAP evolved BV parameters and right panel shows the same for TMD evolved BV parameters.; 00012 Comparison of PHENIX measurements~\cite{Adare:2010bd} of TSSA in $p + p^\uparrow \rightarrow J/\psi +X$ with predictions obtained using BV models of the GSF~\cite{Boer:2003tx}. The points for the combined (2006 +2008) data have been offset by 0.01 in $x_F$ for visibility. Left panel shows comparison with DGLAP evolved BV parameters and right panel shows the same for TMD evolved BV parameters.; 00008 Comparison of asymmetry predictions obtained using TMD evolved BV models~\cite{Boer:2003tx} with those obtained using DGLAP evolved BV models. Left panel shows the $q_T$-asymmetry integrated over $2\leq y\leq 3$ and right panel shows the $y$-asymmetry integrated over $0\leq q_T\leq1.4$ GeV.; 00004 Predictions for asymmetry as a function of $q_T $ (left panel) and y (right panel) obtained using the DMP-SIDIS1 GSF~\cite{D'Alesio:2015uta} parameters for all the three centre of mass values considered ($\sqrt{s}=115$ GeV, 200 GeV, 500 GeV). Integration ranges for rapidity in left panel are $-2.8\leq y \leq 0.2$ for $\sqrt{s}=115$ GeV, $2\leq y \leq 3$ and $3\leq y \leq 3.8 $ for $\sqrt{s}=200$ GeV and $2 \leq y \leq 3 $ and $3 \leq y \leq 4$ for $\sqrt{s}=500$ GeV. In right panel, asymmetry predictions obtained using the DMP-SIDIS1 GSF~\cite{D'Alesio:2015uta} as a function of $y$ are presented for all three centre of mass values ($\sqrt{s}=115$ GeV, 200 GeV, 500 GeV). Integrati on range is for $q_T $ is $ 0 \leq q_T \leq 1.4 $ GeV in all cases. (Asymmetry peaks in negative $y$ region for AFTER@LHC energy as we have used the convention for fixed target experiments as explained in the Section III); 00002 Predictions for $y$-asymmetry in $p + p^\uparrow \rightarrow J/\psi +X$ at RHIC1 ($\sqrt{s}=$ 200 GeV) energy using DGLAP evolved densities with BV(A), BV(B), DMP-SIDIS1 and DMP-SIDIS2 parameters. $q_T$ integration range is $0\leq q_T\leq1.4$ GeV.; 00007 Comparison of asymmetry predictions obtained using TMD evolved BV models~\cite{Boer:2003tx} with those obtained using DGLAP evolved BV models. Left panel shows the $q_T$-asymmetry integrated over $2\leq y\leq 3$ and right panel shows the $y$-asymmetry integrated over $0\leq q_T\leq1.4$ GeV.; 00006 Predictions for asymmetry as a function of $q_T$ (left panel) and y (right panel) obtained using the DMP-SIDIS2 GSF~\cite{D'Alesio:2015uta} parameters for all three centre of mass values considered ($\sqrt{s}=115$ GeV, 200 GeV, 500 GeV). Integration ranges for rapidity in left panel are $-2.8\leq y \leq 0.2$ for $\sqrt{s}=115$ GeV, $2\leq y \leq 3$ and $3\leq y \leq 3.8 $ for $\sqrt{s}=200$ GeV and $2 \leq y \leq 3 $ and $3 \leq y \leq 4$ for $\sqrt{s}=500$ GeV. In right panel, asymmetry predictions obtained using the DMP-SIDIS2 GSF~\cite{D'Alesio:2015uta} are plotted as a function of $y$ for all three centre of mass values considered ($\sqrt{s}=115$ GeV, 200 GeV, 500 GeV). Integration range for $q_T$ is $ 0 \leq q_T \leq 1.4 $ GeV in all cases. (Asymmetry peaks in negative $y$ region for AFTER@LHC energy as we have used the convention for fixed target experiments as explained in the Section III).; 00009 Predictions for $y$-asymmetry obtained using the TMD evolved BV (B) model of GSF~\cite{Boer:2003tx} for all three centre of mass values considered ($\sqrt{s}=115$ GeV, 200 GeV, 500 GeV) with $q_T $ integration range $0\leq q_T\leq1.4$ GeV.; 00003 Predictions for asymmetry as a function of $q_T $ (left panel) and y (right panel) obtained using the DMP-SIDIS1 GSF~\cite{D'Alesio:2015uta} parameters for all the three centre of mass values considered ($\sqrt{s}=115$ GeV, 200 GeV, 500 GeV). Integration ranges for rapidity in left panel are $-2.8\leq y \leq 0.2$ for $\sqrt{s}=115$ GeV, $2\leq y \leq 3$ and $3\leq y \leq 3.8 $ for $\sqrt{s}=200$ GeV and $2 \leq y \leq 3 $ and $3 \leq y \leq 4$ for $\sqrt{s}=500$ GeV. In right panel, asymmetry predictions obtained using the DMP-SIDIS1 GSF~\cite{D'Alesio:2015uta} as a function of $y$ are presented for all three centre of mass values ($\sqrt{s}=115$ GeV, 200 GeV, 500 GeV). Integrati on range is for $q_T $ is $ 0 \leq q_T \leq 1.4 $ GeV in all cases. (Asymmetry peaks in negative $y$ region for AFTER@LHC energy as we have used the convention for fixed target experiments as explained in the Section III); 00013 Predictions for asymmetry in forward region that would be accessible with the fsPHENIX upgrade~\cite{Barish:2012ha, Aschenauer:2015eha}. Error bars indicate expected statistical errors calculated assuming 1 pb$^{-1}$ of data.; 00005 Predictions for asymmetry as a function of $q_T$ (left panel) and y (right panel) obtained using the DMP-SIDIS2 GSF~\cite{D'Alesio:2015uta} parameters for all three centre of mass values considered ($\sqrt{s}=115$ GeV, 200 GeV, 500 GeV). Integration ranges for rapidity in left panel are $-2.8\leq y \leq 0.2$ for $\sqrt{s}=115$ GeV, $2\leq y \leq 3$ and $3\leq y \leq 3.8 $ for $\sqrt{s}=200$ GeV and $2 \leq y \leq 3 $ and $3 \leq y \leq 4$ for $\sqrt{s}=500$ GeV. In right panel, asymmetry predictions obtained using the DMP-SIDIS2 GSF~\cite{D'Alesio:2015uta} are plotted as a function of $y$ for all three centre of mass values considered ($\sqrt{s}=115$ GeV, 200 GeV, 500 GeV). Integration range for $q_T$ is $ 0 \leq q_T \leq 1.4 $ GeV in all cases. (Asymmetry peaks in negative $y$ region for AFTER@LHC energy as we have used the convention for fixed target experiments as explained in the Section III).

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2018-01-13
06:24
Direct detection of antihydrogen atoms using a BGO crystal / Nagata, Y (Tokyo U. of Agric. Tech. ; Wako, RIKEN) ; Kuroda, N (Tokyo U., Komaba ; Wako, RIKEN) ; Ohtsuka, M (Tokyo U., Komaba) ; Leali, M (Brescia U. ; INFN, Brescia) ; Lodi-Rizzini, E (Brescia U. ; INFN, Brescia) ; Mascagna, V (Brescia U. ; INFN, Brescia) ; Tajima, M (Tokyo U., Komaba ; Wako, RIKEN) ; Torii, H A (Tokyo U., Komaba ; Wako, RIKEN) ; Zurlo, N (Brescia U. ; INFN, Brescia) ; Matsuda, Y (Tokyo U., Komaba ; Wako, RIKEN) et al.
The ASACUSA collaboration has developed a detector consisting of a large size BGO crystal to detect an atomic antihydrogen beam, and performed the direct detection of antihydrogen atoms. Energy spectra from antihydrogen annihilation on the BGO crystal are discussed in comparison to simulation results from the GEANT4 toolkit. [...]
2016 - 7 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 840 (2016) 153-159

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2018-01-12
06:31
Longitudinal spin structure of the nucleon: COMPASS legacy / Bedfer, Yann (IRFU, Saclay, DPHN) /COMPASS
The COMPASS collaboration has dedicated a large fraction of its already twenty year long existence to the study of the polarised structure of the nucleon. This presentation addresses two of the investigated aspects: inclusive measurements and direct measurements of the gluon polarised PDF, Δg. [...]
2018 - 6 p. - Published in : J. Phys. : Conf. Ser. 938 (2017) 012002
In : XVII WORKSHOP ON HIGH ENERGY SPIN PHYSICS, Dubna, Russia, 11 - 15 Sep 2017, pp.012002

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2018-01-11
08:00
Gravitational wave bursts from Primordial Black Hole hyperbolic encounters / Garcia-Bellido, Juan (Madrid, IFT ; CERN) ; Nesseris, Savvas (Madrid, IFT)
We propose that Gravitational Wave (GW) bursts with millisecond durations can be explained by the GW emission from the hyperbolic encounters of Primordial Black Holes in dense clusters. These bursts are single events, with the bulk of the released energy happening during the closest approach, and emitted in frequencies within the AdvLIGO sensitivity range. [...]
IFT-UAM-CSIC-17-049; arXiv:1706.02111.- 2017-12 - 4 p. - Published in : Phys. Dark Univ. 18 (2017) 123-126 Preprint: PDF;

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2018-01-11
08:00
Primordial Black Hole production in Critical Higgs Inflation / Ezquiaga, Jose Maria (Madrid, IFT ; UC, Berkeley) ; Garcia-Bellido, Juan (Madrid, IFT ; CERN) ; Ruiz Morales, Ester (Madrid U. ; CERN)
Primordial Black Holes (PBH) arise naturally from high peaks in the curvature power spectrum of near-inflection-point single-field inflation, and could constitute today the dominant component of the dark matter in the universe. In this letter we explore the possibility that a broad spectrum of PBH is formed in models of Critical Higgs Inflation (CHI), where the near-inflection point is related to the critical value of the RGE running of both the Higgs self-coupling $\lambda(\mu)$ and its non-minimal coupling to gravity $\xi(\mu)$. [...]
IFT-UAM-CSIC-17-043; arXiv:1705.04861.- 2018-01-10 - 5 p. - Published in : Phys. Lett. B 776 (2018) 345-349 Article from SCOAP3: PDF; Preprint: PDF;

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2018-01-10
17:30
Indications for the onset of deconfinement in nucleus nucleus collisions / NA49 collaboration
The hadronic final state of central Pb+Pb collisions at 20, 30, 40, 80, and 158 AGeV has been measured by the CERN NA49 collaboration. The mean transverse mass of pions and kaons at midrapidity stays nearly constant in this energy range, whereas at lower energies, at the AGS, a steep increase with beam energy was measured. [...]
nucl-ex/0410041; nucl-ex/0410041.- 2005 - 11 p. - Published in : 10.1142/9789812702227_0043 Fulltext: PDF; Preprint: PDF;
In : 32nd International Conference on High-energy Physics, Beijing, China, 16 - 22 Aug 2004, pp.343-346

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2018-01-10
06:52
Coupling of Magneto-Thermal and Mechanical Superconducting Magnet Models by Means of Mesh-Based Interpolation / Maciejewski, Michał (CERN) ; Bayrasy, Pascal ; Wolf, Klaus ; Wilczek, Michał ; Auchmann, Bernhard ; Griesemer, Tina ; Bortot, Lorenzo (CERN) ; Prioli, Marco (CERN) ; Navarro, Alejandro Manuel Fernandez ; Schöps, Sebastian et al.
In this paper we present an algorithm for the coupling of magneto-thermal and mechanical finite element models representing superconducting accelerator magnets. The mechanical models are used during the design of the mechanical structure as well as the optimization of the magnetic field quality under nominal conditions. [...]
arXiv:1712.10191.- 2017 - 5 p. - Published in : 10.1109/TASC.2017.2786721 Preprint: PDF; External links: 00004 Comparison of the Lorentz force transfer at $t=14~\si{\milli\second}$ between COMSOL (left) and ANSYS (right) models.; 00000 Scheme of the one-way information exchange between magneto-thermal (red) and mechanical (black) models.; 00005 Equivalent stress in the coil at $t=14~\si{\milli\second}$.; 00001 Schematic of the standalone circuit with an 11 T dipole magnet powered by a power converter (PC) with a crowbar (S$\mathsf{_{CR}}$). Magnet is protected by a CLIQ system modelled as a charged capacitor bank and a thyristor triggered at $t=0~\si{\second}$.; 00002 Time evolution of the current discharge in two poles of a magnet following the CLIQ triggering. Dashed lines indicate time points for which results of mechanical analysis are reported.; 00003 Temperature comparison at $t=14~\si{\milli\second}$ between COMSOL (left) and ANSYS (right) models.

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