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Indications of Electron-to-Proton Mass Ratio Variations in the Galaxy. III. 0.6 mm Methanol Lines Toward Sgr B2(N) and Orion-KL.

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Title: Indications of Electron-to-Proton Mass Ratio Variations in the Galaxy. III. 0.6 mm Methanol Lines Toward Sgr B2(N) and Orion-KL.
Authors: Vorotyntseva, J. S.1 (AUTHOR) j.s.vorotyntseva@mail.ioffe.ru, Levshakov, S. A.1 (AUTHOR)
Source: JETP Letters. Apr2026, Vol. 123 Issue 7, p433-443. 11p.
Subjects: Galactic Center, Spectral lines, Orion Nebula, Higgs bosons, Physical constants, Milky Way, Dark matter, Molecular clouds
Abstract: In this paper, we show that methanol (CH3OH), torsional-rotational transitions, which have increased sensitivity to small variations of the electron-to-proton mass ratio μ, are shifted relative to less sensitive transitions in the spectrum of the Sgr B2(N) molecular cloud located at the Galactic center. At the same time, an identical set of methanol lines in the spectrum of the Orion-KL molecular cloud, located far from the center, shows no shifts. Interpreting this behavior of molecular frequencies in terms of leads to the following weighted mean values: for Sgr B2 and × 10–7 for Orion-KL (indicated are the total errors of the weighted means including both statistical and systematic uncertainties). A possible correlation between values measured in various molecular clouds of the Galactic disk and the distribution of dark matter along the Galactic radius is discussed, which may suggest a hypothetical modulation of the Higgs scalar field by dark matter, resulting in a change of. [ABSTRACT FROM AUTHOR]
Copyright of JETP Letters is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Indications of Electron-to-Proton Mass Ratio Variations in the Galaxy. III. 0.6 mm Methanol Lines Toward Sgr B2(N) and Orion-KL.
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  Data: <searchLink fieldCode="AR" term="%22Vorotyntseva%2C+J%2E+S%2E%22">Vorotyntseva, J. S.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> j.s.vorotyntseva@mail.ioffe.ru</i><br /><searchLink fieldCode="AR" term="%22Levshakov%2C+S%2E+A%2E%22">Levshakov, S. A.</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22JETP+Letters%22">JETP Letters</searchLink>. Apr2026, Vol. 123 Issue 7, p433-443. 11p.
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  Data: <searchLink fieldCode="DE" term="%22Galactic+Center%22">Galactic Center</searchLink><br /><searchLink fieldCode="DE" term="%22Spectral+lines%22">Spectral lines</searchLink><br /><searchLink fieldCode="DE" term="%22Orion+Nebula%22">Orion Nebula</searchLink><br /><searchLink fieldCode="DE" term="%22Higgs+bosons%22">Higgs bosons</searchLink><br /><searchLink fieldCode="DE" term="%22Physical+constants%22">Physical constants</searchLink><br /><searchLink fieldCode="DE" term="%22Milky+Way%22">Milky Way</searchLink><br /><searchLink fieldCode="DE" term="%22Dark+matter%22">Dark matter</searchLink><br /><searchLink fieldCode="DE" term="%22Molecular+clouds%22">Molecular clouds</searchLink>
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  Data: In this paper, we show that methanol (CH3OH), torsional-rotational transitions, which have increased sensitivity to small variations of the electron-to-proton mass ratio μ, are shifted relative to less sensitive transitions in the spectrum of the Sgr B2(N) molecular cloud located at the Galactic center. At the same time, an identical set of methanol lines in the spectrum of the Orion-KL molecular cloud, located far from the center, shows no shifts. Interpreting this behavior of molecular frequencies in terms of leads to the following weighted mean values: for Sgr B2 and × 10–7 for Orion-KL (indicated are the total errors of the weighted means including both statistical and systematic uncertainties). A possible correlation between values measured in various molecular clouds of the Galactic disk and the distribution of dark matter along the Galactic radius is discussed, which may suggest a hypothetical modulation of the Higgs scalar field by dark matter, resulting in a change of. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of JETP Letters is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1134/S0021364026600345
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      – Code: eng
        Text: English
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        PageCount: 11
        StartPage: 433
    Subjects:
      – SubjectFull: Galactic Center
        Type: general
      – SubjectFull: Spectral lines
        Type: general
      – SubjectFull: Orion Nebula
        Type: general
      – SubjectFull: Higgs bosons
        Type: general
      – SubjectFull: Physical constants
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      – SubjectFull: Milky Way
        Type: general
      – SubjectFull: Dark matter
        Type: general
      – SubjectFull: Molecular clouds
        Type: general
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      – TitleFull: Indications of Electron-to-Proton Mass Ratio Variations in the Galaxy. III. 0.6 mm Methanol Lines Toward Sgr B2(N) and Orion-KL.
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              Text: Apr2026
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              Y: 2026
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