[Rivet] Born and dressed level in Rivet

[Ulla Blumenschein]

Hi David,


On Tuesday, October 8, 2013, David Grellscheid wrote:

> Hi Ulla,
>
>  We didn't identify the FSR photons experimentally but we unfolded to a
>> reference where a  lepton was dressed with the respective technical
>> FSR implementation.
>>
>
> I'm sorry, I don't understand fully what you did there. The "reference"
> you refer to is a certain MC run with a certain setup? In that case isn't
> your unfolding dependent on that MC author's choice of where to put photon
> emissions in that specific version of the code?


we depend on at least three authors of three generators' choices.

>
>  We checked that we get a similar correction in the
>> standard generators, (pythia, herwig, sherpa..).
>>
>
> That doesn't mean it makes physical sense to split FSR from ISR photons.


No of course not. We are talking here merely in terms of dominating and
negligible contributions to the collinear photon radiation.


>
>   David
>


-- 
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    Ulla Blumenschein
    II Physik, Uni Goettingen
    Friedrich-Hund-Platz 1, D01.110
    phone: 0049-551-397645
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