[Rivet] Born and dressed level in Rivet

[Ulla Blumenschein]

Hi Oleg,

Yes exactly my proposal. For simplification I suggested to repeat your
previous studies but using the new definion proposed by Andy and compare
with the definition that uses the FSR implementation. Maybe also indicate
the statistically limited bins.  Please feel free to do more sophisticated
variations of this study, what do you think Tim?

Cheers, Ulla

On Tuesday, October 8, 2013, Oleg Zenin wrote:

> Dear All,
>
> Somewhat naive question on ISR/FSR interference:
> would it be easy to show that FSR diagrams dominate the amplitude in a
> typical event configurations with leptons in central \eta region
> and photon(s) within \Delta R < 0.1 cones around the leptons and no
> large angle hard emissions?
>
> WBR,
> Oleg.
>
>
> On Tue, 8 Oct 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 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.
>>
>>  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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