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http://java.freehep.org/freehep-physics/apidocs/hep/physics/vec/VecOp.html

On Wed, 18 Jun 2014, McCormick, Jeremy I. wrote:

> Anyone have a good answer for this?
>
> On Jun 18, 2014, at 10:25 AM, Rafayel Paremuzyan <[log in to unmask]> wrote:
>
>> Dear jeremy,
>>
>> I am running a very simple code over Mock Data,
>> and now I am trying to get Lorentz Vectors of two MCParticles, and
>> reconstruct their invariant mass.
>>
>> In the following documentation
>> http://www.lcsim.org/sites/lcsim/apidocs/index.html
>> I found a method "asFourVector" which returns "HepLorentzVector" type
>> object,
>> however looks like "HepLorentzVector" has very limited methods, and in
>> particular I didn't
>> find a way to sum two "HepLorentzVector"s.
>>
>> There is also another class "Lorentz4Vector" which has much more methods
>> including the sum.
>> Now I am not sure how to get Lorentz4Vector from MCParticle.
>>
>> Is there a simple way of doing that?
>>
>> Rafayel
>>
>
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