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1 // Boost.Units - A C++ library for zero-overhead dimensional analysis and
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2 // unit/quantity manipulation and conversion
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3 //
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4 // Copyright (C) 2003-2008 Matthias Christian Schabel
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5 // Copyright (C) 2008 Steven Watanabe
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6 //
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7 // Distributed under the Boost Software License, Version 1.0. (See
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8 // accompanying file LICENSE_1_0.txt or copy at
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9 // http://www.boost.org/LICENSE_1_0.txt)
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10
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11 #ifndef BOOST_UNITS_CODATA_TAU_CONSTANTS_HPP
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12 #define BOOST_UNITS_CODATA_TAU_CONSTANTS_HPP
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13
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14 #include <boost/units/quantity.hpp>
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15 #include <boost/units/static_constant.hpp>
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16
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17 #include <boost/units/systems/detail/constants.hpp>
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18 #include <boost/units/systems/si/amount.hpp>
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19 #include <boost/units/systems/si/area.hpp>
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20 #include <boost/units/systems/si/electric_charge.hpp>
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21 #include <boost/units/systems/si/energy.hpp>
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22 #include <boost/units/systems/si/frequency.hpp>
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23 #include <boost/units/systems/si/length.hpp>
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24 #include <boost/units/systems/si/mass.hpp>
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25 #include <boost/units/systems/si/magnetic_flux_density.hpp>
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26 #include <boost/units/systems/si/time.hpp>
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27 #include <boost/units/systems/si/wavenumber.hpp>
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28
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29 #include <boost/units/systems/si/codata/typedefs.hpp>
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30
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31 /// \file
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32 /// CODATA recommended values of fundamental atomic and nuclear constants
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33 /// CODATA 2006 values as of 2007/03/30
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34
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35 namespace boost {
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36
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37 namespace units {
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38
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39 namespace si {
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40
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41 namespace constants {
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42
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43 namespace codata {
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44
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45 /// CODATA recommended values of the fundamental physical constants: NIST SP 961
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46
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47 /// tau mass
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48 BOOST_UNITS_PHYSICAL_CONSTANT(m_tau,quantity<mass>,3.16777e-27*kilograms,5.2e-31*kilograms);
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49 /// tau-electron mass ratio
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50 BOOST_UNITS_PHYSICAL_CONSTANT(m_tau_over_m_e,quantity<dimensionless>,3477.48*dimensionless(),5.7e-1*dimensionless());
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51 /// tau-muon mass ratio
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52 BOOST_UNITS_PHYSICAL_CONSTANT(m_tau_over_m_mu,quantity<dimensionless>,16.8183*dimensionless(),2.7e-3*dimensionless());
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53 /// tau-proton mass ratio
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54 BOOST_UNITS_PHYSICAL_CONSTANT(m_tau_over_m_p,quantity<dimensionless>,1.89390*dimensionless(),3.1e-4*dimensionless());
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55 /// tau-neutron mass ratio
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56 BOOST_UNITS_PHYSICAL_CONSTANT(m_tau_over_m_n,quantity<dimensionless>,1.89129*dimensionless(),3.1e-4*dimensionless());
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57 /// tau molar mass
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58 BOOST_UNITS_PHYSICAL_CONSTANT(M_tau,quantity<mass_over_amount>,1.90768e-3*kilograms/mole,3.1e-7*kilograms/mole);
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59 /// tau Compton wavelength
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60 BOOST_UNITS_PHYSICAL_CONSTANT(lambda_C_tau,quantity<length>,0.69772e-15*meters,1.1e-19*meters);
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61
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62 } // namespace codata
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63
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64 } // namespace constants
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65
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66 } // namespace si
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67
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68 } // namespace units
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69
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70 } // namespace boost
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71
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72 #endif // BOOST_UNITS_CODATA_TAU_CONSTANTS_HPP
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