1 // Boost.Units - A C++ library for zero-overhead dimensional analysis and 2 // unit/quantity manipulation and conversion 3 // 4 // Copyright (C) 2003-2008 Matthias Christian Schabel 5 // Copyright (C) 2008 Steven Watanabe 6 // 7 // Distributed under the Boost Software License, Version 1.0. (See 8 // accompanying file LICENSE_1_0.txt or copy at 9 // http://www.boost.org/LICENSE_1_0.txt) 10 11 #ifndef BOOST_UNITS_CODATA_TAU_CONSTANTS_HPP 12 #define BOOST_UNITS_CODATA_TAU_CONSTANTS_HPP 13 14 #include <boost/units/quantity.hpp> 15 #include <boost/units/static_constant.hpp> 16 17 #include <boost/units/systems/detail/constants.hpp> 18 #include <boost/units/systems/si/amount.hpp> 19 #include <boost/units/systems/si/area.hpp> 20 #include <boost/units/systems/si/electric_charge.hpp> 21 #include <boost/units/systems/si/energy.hpp> 22 #include <boost/units/systems/si/frequency.hpp> 23 #include <boost/units/systems/si/length.hpp> 24 #include <boost/units/systems/si/mass.hpp> 25 #include <boost/units/systems/si/magnetic_flux_density.hpp> 26 #include <boost/units/systems/si/time.hpp> 27 #include <boost/units/systems/si/wavenumber.hpp> 28 29 #include <boost/units/systems/si/codata/typedefs.hpp> 30 31 /// \file 32 /// CODATA recommended values of fundamental atomic and nuclear constants 33 /// CODATA 2006 values as of 2007/03/30 34 35 namespace boost { 36 37 namespace units { 38 39 namespace si { 40 41 namespace constants { 42 43 namespace codata { 44 45 /// CODATA recommended values of the fundamental physical constants: NIST SP 961 46 47 /// tau mass 48 BOOST_UNITS_PHYSICAL_CONSTANT(m_tau,quantity<mass>,3.16777e-27*kilograms,5.2e-31*kilograms); 49 /// tau-electron mass ratio 50 BOOST_UNITS_PHYSICAL_CONSTANT(m_tau_over_m_e,quantity<dimensionless>,3477.48*dimensionless(),5.7e-1*dimensionless()); 51 /// tau-muon mass ratio 52 BOOST_UNITS_PHYSICAL_CONSTANT(m_tau_over_m_mu,quantity<dimensionless>,16.8183*dimensionless(),2.7e-3*dimensionless()); 53 /// tau-proton mass ratio 54 BOOST_UNITS_PHYSICAL_CONSTANT(m_tau_over_m_p,quantity<dimensionless>,1.89390*dimensionless(),3.1e-4*dimensionless()); 55 /// tau-neutron mass ratio 56 BOOST_UNITS_PHYSICAL_CONSTANT(m_tau_over_m_n,quantity<dimensionless>,1.89129*dimensionless(),3.1e-4*dimensionless()); 57 /// tau molar mass 58 BOOST_UNITS_PHYSICAL_CONSTANT(M_tau,quantity<mass_over_amount>,1.90768e-3*kilograms/mole,3.1e-7*kilograms/mole); 59 /// tau Compton wavelength 60 BOOST_UNITS_PHYSICAL_CONSTANT(lambda_C_tau,quantity<length>,0.69772e-15*meters,1.1e-19*meters); 61 62 } // namespace codata 63 64 } // namespace constants 65 66 } // namespace si 67 68 } // namespace units 69 70 } // namespace boost 71 72 #endif // BOOST_UNITS_CODATA_TAU_CONSTANTS_HPP 73