Quarks have the unusual characteristic of having a fractional electric charge. here there is a new model that suggests maybe an up Quark has no electric charge and infact down Quark has electric charge of (+1,-1), through weak interaction between Up Quark and W$^{\pm}$

$$u^{0}+W^{+}\to d^{+},$$ $$u^{0}+W^{-}\to d^{-},$$

sounds like this idea consisted with neutron decay. $$n^{0}\to p^{+}+W^{-},$$ $$u^{0}d^{-}d^{+}\to u^{0}u^{0}d^{+}+W^{-}.$$

Reference: http://meetings.aps.org/Meeting/OSS13/Event/195666

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    $\begingroup$ That's not a reference. This guy cannot even be found on Inspire. $\endgroup$ – Vibert Apr 7 '13 at 14:03
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    $\begingroup$ This doesn't look like a question... $\endgroup$ – Nathaniel Apr 7 '13 at 14:09
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    $\begingroup$ But what's your question after all? You want to have any explanation about this? Always make your questions very explicit so that we know what is being really asked. $\endgroup$ – user1620696 Apr 7 '13 at 14:17
  • $\begingroup$ Possible duplicate also asking about Ahmad Reza Estakhr's quark model: physics.stackexchange.com/q/37998/2451 $\endgroup$ – Qmechanic Apr 7 '13 at 14:31
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    $\begingroup$ The answer from Mitchell Porter in the -claimed- duplicate question tells most of the history: Han-Nambu solutions. $\endgroup$ – arivero Apr 7 '13 at 22:31

This idea that probabilities is associated with unknown parameters is true!, so Quarks fractional electric charge is not accurate value. it is the most probable value

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