Amplitude analysis of four-body decays using a massively-parallel fitting framework - INSPIRE

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Amplitude analysis of four-body decays using a massively-parallel fitting framework

C. Hasse
(
- CERN and
- Tech. U., Dortmund (main) and
- Cincinnati U.
)
,
J. Albrecht
(
- Tech. U., Dortmund (main)
)
,
A.A. Alves
(
- Cincinnati U.
)
,
P. d'Argent
(
- Heidelberg U.
)
,
T.D. Evans
(
- Oxford U.
)

Feb 22, 2017

7 pages

Part of Proceedings, 22nd International Conference on Computing in High Energy and Nuclear Physics (CHEP2016) : San Francisco, CA, October 14-16, 2016

Published in:

J.Phys.Conf.Ser. 898 (2017) 7, 072016

Contribution to:

- CHEP 2016

Published: Nov 20, 2017

e-Print:

1702.06735 [hep-ex]

DOI:

10.1088/1742-6596/898/7/072016

View in:

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Abstract: (IOP)

The GooFit Framework is designed to perform maximum-likelihood fits for arbitrary functions on various parallel back ends, for example a GPU. We present an extension to GooFit which adds the functionality to perform time-dependent amplitude analyses of pseudoscalar mesons decaying into four pseudoscalar final states. Benchmarks of this functionality show a significant performance increase when utilizing a GPU compared to a CPU. Furthermore, this extension is employed to study the sensitivity on the mixing parameters x and y in a time-dependent amplitude analysis of the decay D0 → K+π−π+π−. Studying a sample of 50 000 events and setting the central values to the world average of x = (0.49 ± 0.15)% and y = (0.61 ± 0.08)%, the statistical sensitivities of x and y are determined to be σ(x) = 0.019 % and σ(y) = 0.019 %.

Note:

Proceedings of the 22nd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2016

talk: San Francisco 2016/10/14
amplitude analysis: time dependence
decay: amplitude analysis
D0: hadronic decay
pi: multiple production
sensitivity
pseudoscalar meson
statistical
performance
benchmark

References(11)

Figures(5)

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)
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)
,
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(
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)
,
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)

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•
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