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Where can I get the most authentic information about the fundamental particles about all their properties(like charge, mass, spin, isospin, parity, hypercharge etc) which a particle physicist might be interested in?

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That's furnished by the Particle Data Group: http://pdg.lbl.gov/2017/tables/contents_tables.html

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  • $\begingroup$ I was looking for the mean lifetime of B_d meson. Could not find it in PDG live. $\endgroup$
    – Seeker
    Commented Jul 31, 2017 at 11:49
  • $\begingroup$ @Seeker do you mean the B^0? 1,5 10^-12s . If not then could you state what quark content B_d is supposed to have? $\endgroup$
    – lalala
    Commented Jul 31, 2017 at 12:31
  • $\begingroup$ Not a flavor physics person, but as far as I understand the experiments study mass eigenstates ($B^0$ and $\bar{B}^0$) rather than flavor eigenstates ($B_d$ and $\bar{B}_d$). So as lalala says, you should be looking at $B^0$ data and data about $B-\bar{B}$ mixing. $\endgroup$
    – user159249
    Commented Jul 31, 2017 at 12:50
  • $\begingroup$ $B^0$ and $B^0_d$ are synonymous. $B^0_d$ and $B^+_u$ are sometimes used to distinguish from $B^0_s$ or $B^+_c$. The mass eigenstates are $B^0_H$ and $B^0_L$. $\endgroup$
    – dukwon
    Commented Jul 31, 2017 at 13:36
  • $\begingroup$ @Seeker It is here: pdglive.lbl.gov/DataBlock.action?node=S042T&init=0 $\endgroup$
    – dukwon
    Commented Jul 31, 2017 at 13:44

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