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CERN Preprints

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2021-01-15
06:31
TOF-PET image reconstruction with multiple timing kernels applied on Cherenkov radiation in BGO / Efthimiou, Nikos (Pennsylvania U. ; Hull U.) ; Kratochwil, Nicolaus (Vienna U. ; CERN) ; Gundacker, Stefan (Milan Bicocca U. ; CERN ; RWTH Aachen U.) ; Polesel, Andrea (Milan Bicocca U. ; CERN) ; Salomoni, Matteo (Milan Bicocca U. ; CERN) ; Auffray, Etiennette (CERN) ; Pizzichemi, Marco (Milan Bicocca U. ; CERN)
Today Time-Of-Flight (TOF), in PET scanners, assumes a single, well-defined timing resolution for all events. [...]
2021. - 9 p.
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2021-01-15
06:31
Annealing studies combined with low temperature emission Mössbauer spectroscopy of short-lived parent isotopes: Determination of local Debye–Waller factors / Gunnlaugsson, H P (Iceland U.) ; Masenda, H (U. Witwatersrand, Johannesburg, Sch. Phys.) ; Mølholt, T E (Denmark, Tech. U.) ; Bharuth-Ram, K (KwaZulu Natal U. ; DUT, Durban) ; Ólafsson, S (Iceland U.) ; Johnston, K (CERN) ; Schell, J (CERN ; Duisburg-Essen U.) ; Gislason, H P (Iceland U.) ; Krastev, P B (Sofiya, Inst. Nucl. Res.) ; Mantovan, R (SGS Thomson, Milan) et al.
An extension of the online implantation chamber used for emission Mössbauer Spectroscopy (eMS) at ISOLDE/CERN that allows for quick removal of samples for offline low temperature studies is briefly described. [...]
2021.
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2021-01-15
04:01
Axion assisted Schwinger effect / Domcke, Valerie ; Ema, Yohei ; Mukaida, Kyohei
We point out an enhancement of the pair production rate of charged fermions in a strong electric field in the presence of time dependent classical axion-like background field, which we call axion assisted Schwinger effect. [...]
arXiv:2101.05192 ; DESY 21-006 ; CERN-TH-2021-010.
- 18 p.
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2021-01-15
04:01
The Schwarzian sector of higher spin CFTs / Datta, Shouvik
Two-dimensional conformal field theories with Virasoro symmetry generically contain a Schwarzian sector. [...]
CERN-TH-2021-009 ; arXiv:2101.04980.
- 21 p.
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2021-01-15
04:00
Scattering from production in 2d / Tourkine, Piotr ; Zhiboedov, Alexander
In 1968, Atkinson proved the existence of functions that satisfy all S-matrix axioms in four spacetime dimensions. [...]
arXiv:2101.05211 ; CERN-TH-2020-218.
- 34 p.
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2021-01-15
04:00
BlackHawk: A tool for computing Black Hole evaporation / Auffinger, Jérémy (IP2I, Lyon) ; Arbey, Alexandre (IP2I, Lyon ; IUF, Paris ; CERN)
We present the public code \texttt{BlackHawk}, a powerful tool to compute the evaporation of any distribution of Schwarzschild and Kerr Black Holes and the emission spectra of Hawking radiation..
arXiv:2012.12902.
- 11 p.
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2021-01-15
04:00
Beam Diagnostics in the Advanced Plasma Wakefield Experiment AWAKE / Bachmann, A.-M. ; Muggli, P.
In AWAKE a self-modulated proton bunch drives wakefields in a plasma. [...]
arXiv:2012.10097.
- 6 p.
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2021-01-15
04:00
Transition between Instability and Seeded Self-Modulation of a Relativistic Particle Bunch in Plasma / AWAKE Collaboration
We use a relativistic ionization front to provide various initial transverse wakefield amplitudes for the self-modulation of a long proton bunch in plasma. [...]
arXiv:2012.09676.
- 8 p.
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2021-01-14
06:01
Recent results on CP violation in charm sector by LHCb / Saur, M (Beijing, GUCAS)
These proceedings present a measurement of the mass difference between neutral charm meson mass eigenstates, a search for time-dependent CP violation in neutral charm meson decays and the first observation of CP violation in charm hadrons decays..
2020. - 7 p.

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2021-01-14
06:01
GPD measurements at COMPASS / Lin, P J (Orsay, IPN)
Utilizing the 160 GeV/c polarized muon beams provided by the CERN SPS, COMPASS studies the Generalized Parton Distributions (GPDs) via Deeply Virtual Compton Scattering (DVCS) and Hard Exclusive Meson Production (HEMP). [...]
2020. - 6 p.

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