The Experts below are selected from a list of 43590 Experts worldwide ranked by ideXlab platform
Farinaldo S Queiroz - One of the best experts on this subject based on the ideXlab platform.
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new physics probes atomic parity violation polarized electron Scattering and neutrino nucleus Coherent Scattering
Nuclear Physics, 2020Co-Authors: Giorgio Arcadi, M Lindner, Jessica Taynara Da Silva Martins, Farinaldo S QueirozAbstract:Abstract Atomic Parity Violation (APV) is usually quantified in terms of the weak nuclear charge Q W of a nucleus, which depends on the coupling strength between the atomic electrons and quarks. In this work, we review the importance of APV to probing new physics using effective field theory. Furthermore, we correlate our findings with the results from neutrino-nucleus Coherent Scattering. We revisit signs of parity violation in polarized electron Scattering and show how precise measurements on the Weinberg's angle give rise to competitive bounds on light mediators over a wide range of masses and interactions strengths. Our bounds are firstly derived in the context of simplified setups and then applied to several concrete models, namely Dark Z, Two Higgs Doublet Model- U ( 1 ) X and 3-3-1, considering both light and heavy mediator regimes.
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new physics probes atomic parity violation polarized electron Scattering and neutrino nucleus Coherent Scattering
arXiv: High Energy Physics - Phenomenology, 2019Co-Authors: Giorgio Arcadi, M Lindner, Jessica Taynara Da Silva Martins, Farinaldo S QueirozAbstract:Atomic Parity Violation (APV) is usually quantified in terms of the weak nuclear charge $Q_W$ of a nucleus, which depends on the coupling strength between the atomic electrons and quarks. In this work, we review the importance of APV to probing new physics using effective field theory. Furthermore, using $SU(2)$ invariance, we correlate our findings with those from neutrino-nucleus Coherent Scattering. Moreover, we investigate signs of parity violation in polarized electron Scattering and show how precise measurements on the Weinberg angle, $\sin \theta_W$, will give rise to competitive bounds on light mediators over a wide range of masses and interactions strength. Lastly, apply our bounds to several models namely, Dark Z, Two Higgs Doublet Model-$U(1)_X$ and 3-3-1, considering both light and heavy mediator regimes.
Joel W Walker - One of the best experts on this subject based on the ideXlab platform.
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sensitivity to oscillation with a sterile fourth generation neutrino from ultralow threshold neutrino nucleus Coherent Scattering
Physical Review D, 2016Co-Authors: B Dutta, Yu Gao, Andrew Kubik, R Mahapatra, N Mirabolfathi, Louis E Strigari, Joel W WalkerAbstract:We discuss prospects for probing short-range sterile neutrino oscillation using neutrino-nucleus Coherent Scattering with ultra-low energy ($\sim 10$ eV - 100 eV) recoil threshold cryogenic Ge detectors. The analysis is performed in the context of a specific and contemporary reactor-based experimental proposal, developed in cooperation with the Nuclear Science Center at Texas A\&M University, and references developing technology based upon economical and scalable detector arrays. The baseline of the experiment is substantially shorter than existing measurements, as near as about 2 meters from the reactor core, and is moreover variable, extending continuously up to a range of about 10 meters. This proximity and variety combine to provide extraordinary sensitivity to a wide spectrum of oscillation scales, while facilitating the tidy cancellation of leading systematic uncertainties in the reactor source and environment. With 100~eV sensitivity, for exposures on the order of 200 kg$\cdot$y, we project an estimated sensitivity to first/fourth neutrino oscillation with a mass gap $\Delta m^2 \sim 1 \, {\rm eV}^2$ at an amplitude $\sin^2 2\theta \sim 10^{-1}$, or $\Delta m^2 \sim 0.2 \, {\rm eV}^2$ at unit amplitude. Larger exposures, around 5,000 kg$\cdot$y, together with 10 eV sensitivity are capable of probing more than an additional order of magnitude in amplitude.
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sensitivity to z prime and nonstandard neutrino interactions from ultralow threshold neutrino nucleus Coherent Scattering
Physical Review D, 2016Co-Authors: B Dutta, R Mahapatra, Louis E Strigari, Joel W WalkerAbstract:We discuss prospects for probing $Z$-prime and nonstandard neutrino interactions using neutrino-nucleus Coherent Scattering with ultralow energy ($\ensuremath{\sim}10\text{ }\text{ }\mathrm{eV}$) threshold Si and Ge detectors. The analysis is performed in the context of a specific and contemporary reactor-based experimental proposal, developed in cooperation with the Nuclear Science Center at Texas A University, and referencing available technology based upon economical and scalable detector arrays. For expected exposures, we show that sensitivity to the $Z$-prime mass is on the order of several TeV and is complementary to the LHC search with low-mass detectors in the near term. This technology is also shown to provide sensitivity to the neutrino magnetic moment, at a level that surpasses terrestrial limits, and is competitive with more stringent astrophysical bounds. We demonstrate the benefits of combining silicon and germanium detectors for distinguishing between classes of models of new physics and for suppressing correlated systematic uncertainties.
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sensitivity to z prime and nonstandard neutrino interactions from ultralow threshold neutrino nucleus Coherent Scattering
Physical Review D, 2016Co-Authors: B Dutta, R Mahapatra, Louis E Strigari, Joel W WalkerAbstract:We discuss prospects for probing Z-prime and non-standard neutrino interactions using neutrino-nucleus Coherent Scattering with ultra-low energy (~ 10 eV) threshold Si and Ge detectors. The analysis is performed in the context of a specific and contemporary reactor-based experimental proposal, developed in cooperation with the Nuclear Science Center at Texas A&M University, and referencing available technology based upon economical and scalable detector arrays. For expected exposures, we show that sensitivity to the Z-prime mass is on the order of several TeV, and is complementary to the LHC search with low mass detectors in the near term. This technology is also shown to provide sensitivity to the neutrino magnetic moment, at a level that surpasses terrestrial limits, and is competitive with more stringent astrophysical bounds. We demonstrate the benefits of combining silicon and germanium detectors for distinguishing between classes of models of new physics, and for suppressing correlated systematic uncertainties.
Giorgio Arcadi - One of the best experts on this subject based on the ideXlab platform.
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new physics probes atomic parity violation polarized electron Scattering and neutrino nucleus Coherent Scattering
Nuclear Physics, 2020Co-Authors: Giorgio Arcadi, M Lindner, Jessica Taynara Da Silva Martins, Farinaldo S QueirozAbstract:Abstract Atomic Parity Violation (APV) is usually quantified in terms of the weak nuclear charge Q W of a nucleus, which depends on the coupling strength between the atomic electrons and quarks. In this work, we review the importance of APV to probing new physics using effective field theory. Furthermore, we correlate our findings with the results from neutrino-nucleus Coherent Scattering. We revisit signs of parity violation in polarized electron Scattering and show how precise measurements on the Weinberg's angle give rise to competitive bounds on light mediators over a wide range of masses and interactions strengths. Our bounds are firstly derived in the context of simplified setups and then applied to several concrete models, namely Dark Z, Two Higgs Doublet Model- U ( 1 ) X and 3-3-1, considering both light and heavy mediator regimes.
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new physics probes atomic parity violation polarized electron Scattering and neutrino nucleus Coherent Scattering
arXiv: High Energy Physics - Phenomenology, 2019Co-Authors: Giorgio Arcadi, M Lindner, Jessica Taynara Da Silva Martins, Farinaldo S QueirozAbstract:Atomic Parity Violation (APV) is usually quantified in terms of the weak nuclear charge $Q_W$ of a nucleus, which depends on the coupling strength between the atomic electrons and quarks. In this work, we review the importance of APV to probing new physics using effective field theory. Furthermore, using $SU(2)$ invariance, we correlate our findings with those from neutrino-nucleus Coherent Scattering. Moreover, we investigate signs of parity violation in polarized electron Scattering and show how precise measurements on the Weinberg angle, $\sin \theta_W$, will give rise to competitive bounds on light mediators over a wide range of masses and interactions strength. Lastly, apply our bounds to several models namely, Dark Z, Two Higgs Doublet Model-$U(1)_X$ and 3-3-1, considering both light and heavy mediator regimes.
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Coherent Scattering and macroscopic coherence: implications for neutrino, dark matter and axion detection
SpringerOpen, 2018Co-Authors: Evgeny Akhmedov, Giorgio Arcadi, Manfred Lindner, Stefan VoglAbstract:Abstract We study the question of whether Coherent neutrino Scattering can occur on macroscopic scales, leading to a significant increase of the detection cross section. We concentrate on radiative neutrino Scattering on atomic electrons (or on free electrons in a conductor). Such processes can be Coherent provided that the net electron recoil momentum, i.e. the momentum transfer from the neutrino minus the momentum of the emitted photon, is sufficiently small. The radiative processes is an attractive possibility as the energy of the emitted photons can be as large as the momentum transfer to the electron system and therefore the problem of detecting extremely low energy recoils can be avoided. The requirement of macroscopic coherence severely constrains the phase space available for the scattered particle and the emitted photon. We show that in the case of the Scattering mediated by the usual weak neutral current and charged current interactions this leads to a strong suppression of the elementary cross sections and therefore the requirement of macroscopic coherence results in a reduction rather than an increase of the total detection cross section. However, for the νe Scattering mediated by neutrino magnetic or electric dipole moments coherence effects can actually increase the detection rates. Effects of macroscopic coherence can also allow detection of neutrinos in 100 eV — a few keV energy range, which is currently not accessible to the experiment. A similar Coherent enhancement mechanism can work for relativistic particles in the dark sector, but not for the conventionally considered non-relativistic dark matter
B Dutta - One of the best experts on this subject based on the ideXlab platform.
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sensitivity to oscillation with a sterile fourth generation neutrino from ultralow threshold neutrino nucleus Coherent Scattering
Physical Review D, 2016Co-Authors: B Dutta, Yu Gao, Andrew Kubik, R Mahapatra, N Mirabolfathi, Louis E Strigari, Joel W WalkerAbstract:We discuss prospects for probing short-range sterile neutrino oscillation using neutrino-nucleus Coherent Scattering with ultra-low energy ($\sim 10$ eV - 100 eV) recoil threshold cryogenic Ge detectors. The analysis is performed in the context of a specific and contemporary reactor-based experimental proposal, developed in cooperation with the Nuclear Science Center at Texas A\&M University, and references developing technology based upon economical and scalable detector arrays. The baseline of the experiment is substantially shorter than existing measurements, as near as about 2 meters from the reactor core, and is moreover variable, extending continuously up to a range of about 10 meters. This proximity and variety combine to provide extraordinary sensitivity to a wide spectrum of oscillation scales, while facilitating the tidy cancellation of leading systematic uncertainties in the reactor source and environment. With 100~eV sensitivity, for exposures on the order of 200 kg$\cdot$y, we project an estimated sensitivity to first/fourth neutrino oscillation with a mass gap $\Delta m^2 \sim 1 \, {\rm eV}^2$ at an amplitude $\sin^2 2\theta \sim 10^{-1}$, or $\Delta m^2 \sim 0.2 \, {\rm eV}^2$ at unit amplitude. Larger exposures, around 5,000 kg$\cdot$y, together with 10 eV sensitivity are capable of probing more than an additional order of magnitude in amplitude.
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sensitivity to z prime and nonstandard neutrino interactions from ultralow threshold neutrino nucleus Coherent Scattering
Physical Review D, 2016Co-Authors: B Dutta, R Mahapatra, Louis E Strigari, Joel W WalkerAbstract:We discuss prospects for probing $Z$-prime and nonstandard neutrino interactions using neutrino-nucleus Coherent Scattering with ultralow energy ($\ensuremath{\sim}10\text{ }\text{ }\mathrm{eV}$) threshold Si and Ge detectors. The analysis is performed in the context of a specific and contemporary reactor-based experimental proposal, developed in cooperation with the Nuclear Science Center at Texas A University, and referencing available technology based upon economical and scalable detector arrays. For expected exposures, we show that sensitivity to the $Z$-prime mass is on the order of several TeV and is complementary to the LHC search with low-mass detectors in the near term. This technology is also shown to provide sensitivity to the neutrino magnetic moment, at a level that surpasses terrestrial limits, and is competitive with more stringent astrophysical bounds. We demonstrate the benefits of combining silicon and germanium detectors for distinguishing between classes of models of new physics and for suppressing correlated systematic uncertainties.
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sensitivity to z prime and nonstandard neutrino interactions from ultralow threshold neutrino nucleus Coherent Scattering
Physical Review D, 2016Co-Authors: B Dutta, R Mahapatra, Louis E Strigari, Joel W WalkerAbstract:We discuss prospects for probing Z-prime and non-standard neutrino interactions using neutrino-nucleus Coherent Scattering with ultra-low energy (~ 10 eV) threshold Si and Ge detectors. The analysis is performed in the context of a specific and contemporary reactor-based experimental proposal, developed in cooperation with the Nuclear Science Center at Texas A&M University, and referencing available technology based upon economical and scalable detector arrays. For expected exposures, we show that sensitivity to the Z-prime mass is on the order of several TeV, and is complementary to the LHC search with low mass detectors in the near term. This technology is also shown to provide sensitivity to the neutrino magnetic moment, at a level that surpasses terrestrial limits, and is competitive with more stringent astrophysical bounds. We demonstrate the benefits of combining silicon and germanium detectors for distinguishing between classes of models of new physics, and for suppressing correlated systematic uncertainties.
Jinho Ahn - One of the best experts on this subject based on the ideXlab platform.
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Coherent Scattering microscopy as an effective inspection tool for analyzing performance of phase shift mask
Optics Express, 2016Co-Authors: Dong Gon Woo, Seongchul Hong, Jae Uk Lee, Jung Sik Kim, Jinho AhnAbstract:The imaging performance of a half-tone phase shift mask (PSM) has been analyzed using Coherent Scattering microscopy (CSM), which allows analysis of the actinic characteristics of an extreme ultraviolet (EUV) mask such as its reflectivity, diffraction efficiency, and phase information. This paper presents the 1st experimental result showing the effect of 180° phase difference between the absorber and reflector in EUV mask. This reveals that a PSM offers a 46% improvement in 1st/0th diffraction efficiency and 14% improvement in image contrast when compared to a binary intensity mask (BIM). The horizontal-vertical critical dimension (H-V CD) bias is also reduced by 1.37 nm at 22 nm line and space (L/S) patterns. Since the performance of PSM can be evaluated without a wafer patterning process, CSM is expected to be a useful inspection tool for the development of novel EUV masks.
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actinic critical dimension measurement of contaminated extreme ultraviolet mask using Coherent Scattering microscopy
Journal of Vacuum Science & Technology. B. Nanotechnology and Microelectronics: Materials Processing Measurement and Phenomena, 2014Co-Authors: Jae Uk Lee, Jinho Ahn, Seongchul Hong, Jonggul Doh, Seejun JeongAbstract:The authors evaluated the feasibility of using Coherent Scattering microscopy (CSM) as an actinic metrology tool by employing it to determine the critical dimension (CD) and normalized image log-slope (NILS) values of contaminated extreme ultraviolet (EUV) masks. CSM was as effective as CD scanning electron microscopy (CD-SEM) in measuring the CD values of clean EUV masks in the case of vertical patterns (nonshadowing effect); however, only the CSM could detect shadowing effect for horizontal patterns resulting in smaller clear mask CD values. Owing to weak interaction between the low-density contaminant layer and EUV radiation, the CSM-based CD measurements were not as affected by contamination as were those made using CD-SEM. Furthermore, CSM could be used to determine the NILS values under illumination conditions corresponding to a high-volume manufacturing tool.
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imaging performance of attenuated phase shift mask using Coherent Scattering microscope
Proceedings of SPIE, 2014Co-Authors: Jae Uk Lee, Seongchul Hong, Seejun Jeong, Seung Min Lee, Jinho AhnAbstract:The half-tone phase shift mask (PSM) has been suggested for better imaging performances like image contrast, NILS and H-V bias compared to the binary mask (BIM) in EUV lithography. In this paper, we measured imaging performance of a fabricated half-tone attenuated PSM with Coherent Scattering Microscopy (CSM) and the results were compared with simulation data obtained by EM-suite tool. We prepared a half-tone attenuated PSM which has 12.7% reflectivity and 180° phase shift with absorber stack of 16.5mn-thick TaN absorber and 24nm-thick Mo phase shifter. With CSM, an actinic inspection tool, we measured the imaging properties of PSM. The diffraction efficiencies of BIM were measured as 31%, 36%, and 44% for 88 nm, 100 nm, and 128 nm mask CD, respectively, while those of PSM were measured as 45%, 62%, and 81%. Also the aerial image at wafer level obtained by CSM with high volume manufacturing tool’s (HVM) illumination condition (NA=0.33, σ=0.9) showed higher image contrast and NILS with phase shift effect. And the measured data were consistent with the simulation data.
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effect on critical dimension performance for carbon contamination of extreme ultraviolet mask using Coherent Scattering microscopy and in situ contamination system
Japanese Journal of Applied Physics, 2012Co-Authors: Seongchul Hong, Jonggul Doh, Sangsul Lee, Jaewook Lee, Chang Young Jeong, Donggun Lee, Seong Sue Kim, Jinho AhnAbstract:The impact of carbon contamination on imaging performance was analyzed using an in-situ accelerated contamination system (ICS) combined with Coherent Scattering microscopy (CSM) which was installed at 11B extreme ultraviolet lithography (EUVL) beamline of the Pohang Accelerator Laboratory (PAL). The CSM/ICS is composed of CSM for measuring imaging properties and ICS for implementing acceleration of carbon contamination. The mask critical dimension (CD) and reflectivity were compared before and after carbon contamination through accelerated exposure. The reflectivity degradation was measured as 1.3, 2.0, and 2.8% after 1, 2, and 3 h exposure, respectively, due to carbon contamination of 5, 10, and 20 nm as measured by Zygo interferometer. The mask CD change for 88 nm line and space pattern was analyzed using CSM and a CD scanning electron microscope (SEM), and the result shows CD-SEM and CSM give large difference of 3.8 times in mask ΔCD after carbon contamination. This difference confirms the importance of using actinic inspection technique that employs exactly the same imaging condition as exposure tool.
