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Creators/Authors contains: "Takahashi, Y."

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  1. ; ; ; ; ; ( , ArXivorg)
    Accepted Manuscript Full Text Available
  2. ; ; ; ; ; ; ; ; ( , Physical Review Applied)
  3. ; ; ; ; ; ; ; ; ; ; et al ( , Science)
    Samples of the carbonaceous asteroid Ryugu were brought to Earth by the Hayabusa2 spacecraft. We analyzed seventeen Ryugu samples measuring 1-8 mm. CO 2 -bearing water inclusions are present within a pyrrhotite crystal, indicating that Ryugu’s parent asteroid formed in the outer Solar System. The samples contain low abundances of materials that formed at high temperatures, such as chondrules and Ca, Al-rich inclusions. The samples are rich in phyllosilicates and carbonates, which formed by aqueous alteration reactions at low temperature, high pH, and water/rock ratios < 1 (by mass). Less altered fragments contain olivine, pyroxene, amorphous silicates, calcite, and phosphide. Numerical simulations, based on the mineralogical and physical properties of the samples, indicate Ryugu’s parent body formed ~ 2 million years after the beginning of Solar System formation. 
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  4. ; ; ; ; ; ; ; ; ; ; et al ( , Physical Review D)
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  5. ; ; ; ; ; ; ; ; ; ; et al ( , Physics Letters B)
    Free, publicly-accessible full text available December 1, 2024
  6. ; ; ; ; ; ; ; ; ; ; et al ( , Physics Letters B)
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  7. ; ; ; ; ; ; ; ; ; ; et al ( , Physics Letters B)
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  8. ; ; ; ; ; ; ; ; ; ; et al ( , Journal of Instrumentation)
    Abstract

    A description is presented of the algorithms used to reconstruct energy deposited in the CMS hadron calorimeter during Run 2 (2015–2018) of the LHC. During Run 2, the characteristic bunch-crossing spacing for proton-proton collisions was 25 ns, which resulted in overlapping signals from adjacent crossings. The energy corresponding to a particular bunch crossing of interest is estimated using the known pulse shapes of energy depositions in the calorimeter, which are measured as functions of both energy and time. A variety of algorithms were developed to mitigate the effects of adjacent bunch crossings on local energy reconstruction in the hadron calorimeter in Run 2, and their performance is compared.

     
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    Free, publicly-accessible full text available November 1, 2024
  9. ; ; ; ; ; ; ; ; ; ; et al ( , Physics Letters B)
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  10. ; ; ; ; ; ; ; ; ; ; et al ( , Physical Review D)
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