The Earth's velocity for direct detection experiments

McCabe, Christopher

doi:10.1088/1475-7516/2014/02/027

Title: The Earth's velocity for direct detection experiments

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Abstract

The Earth's velocity relative to the Sun in galactic coordinates is required in the rate calculation for direct detection experiments. We provide a rigorous derivation of this quantity to first order in the eccentricity of the Earth's orbit. We also discuss the effect of the precession of the equinoxes, which has hitherto received little explicit discussion. Comparing with other expressions in the literature, we confirm that the expression of Lee, Lisanti and Safdi is correct, while the expression of Lewin and Smith, the de facto standard expression, contains an error. For calculations of the absolute event rate, the leading order expression is sufficient while for modulation searches, an expression with the eccentricity is required for accurate predictions of the modulation phase.

Authors:

McCabe, Christopher ^[1]

Institute for Particle Physics Phenomenology, Durham University, South Road, Durham, DH1 3LE (United Kingdom)

Publication Date:: Sat Feb 01 00:00:00 EST 2014

OSTI Identifier:: 22369759

Resource Type:: Journal Article

Journal Name:: Journal of Cosmology and Astroparticle Physics

Additional Journal Information:: Journal Volume: 2014; Journal Issue: 02; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1475-7516

Country of Publication:: United States

Language:: English

Subject:: 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COORDINATES; DETECTION; ERRORS; FORECASTING; ORBITS; PRECESSION; SUN; VELOCITY

Citation Formats


                    McCabe, Christopher. The Earth's velocity for direct detection experiments.  United States: N. p., 2014. 
        Web.  doi:10.1088/1475-7516/2014/02/027.

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                    McCabe, Christopher. The Earth's velocity for direct detection experiments.  United States.  https://doi.org/10.1088/1475-7516/2014/02/027

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                    McCabe, Christopher. 2014.  
        "The Earth's velocity for direct detection experiments".  United States.  https://doi.org/10.1088/1475-7516/2014/02/027.

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@article{osti_22369759,

  title        = {The Earth's velocity for direct detection experiments},

  author       = {McCabe, Christopher},

  abstractNote = {The Earth's velocity relative to the Sun in galactic coordinates is required in the rate calculation for direct detection experiments. We provide a rigorous derivation of this quantity to first order in the eccentricity of the Earth's orbit. We also discuss the effect of the precession of the equinoxes, which has hitherto received little explicit discussion. Comparing with other expressions in the literature, we confirm that the expression of Lee, Lisanti and Safdi is correct, while the expression of Lewin and Smith, the de facto standard expression, contains an error. For calculations of the absolute event rate, the leading order expression is sufficient while for modulation searches, an expression with the eccentricity is required for accurate predictions of the modulation phase.},

  doi          = {10.1088/1475-7516/2014/02/027},

  url          = {https://www.osti.gov/biblio/22369759},
  journal      = {Journal of Cosmology and Astroparticle Physics},

  issn         = {1475-7516},

  number       = 02,

  volume       = 2014,

  place        = {United States},

  year         = {Sat Feb 01 00:00:00 EST 2014},

  month        = {Sat Feb 01 00:00:00 EST 2014}

}

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