ox 2.4952\text{ GeV}`
[4]_ one can set ``rho=91.1876/2.4952`` and ``scale=2.4952``.

To ensure a physically meaningful result when using the `fit` method, one
should set ``floc=0`` to fix the location parameter to 0.

References
----------
.. [1] Relativistic Breit-Wigner distribution, Wikipedia,
       https://en.wikipedia.org/wiki/Relativistic_Breit-Wigner_distribution
.. [2] Invariant mass, Wikipedia,
       https://en.wikipedia.org/wiki/Invariant_mass
.. [3] Center-of-momentum frame, Wikipedia,
       https://en.wikipedia.org/wiki/Center-of-momentum_frame
.. [4] M. Tanabashi et al. (Particle Data Group) Phys. Rev. D 98, 030001 -
       Published 17 August 2018

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