[Blackmax] PDF value info

[Eram Rizvi]

Hi Shion

Some of these quantities are already available but not directly.
x1 and x2 are available from the 4-vectors of the incoming partons
these are the first two particle row entries in the <event> xml block
with status flag -1

Q2 is stored as the 4th entry in the header part of the <event> xml
block and can also be calculated from the partonic 4-vectors.

f1 and f2 are not stored. But this is maybe not too useful. Perhaps
you are more interested in the ID of the parton, i.e. whether it is up
and down quarks etc? This is stored in the first column of each
particle row in the <event> xml block.

The output file follows the LHE standard as it is, so I would not like
to modify this. Does that help?
Cheers
Eram


On 22 December 2014 at 13:22, Shion Chen <shion.chen at cern.ch> wrote:
> Dear authors and black hole masters
>
> Hi, I'm now carrying out a feasibility study on differential cross-section
> measurement of mini black holes and hope to extract truth pdf value (f(x) or
> xf(x) etc.) of every events.
> Would it be possible to put all them down in output, like standard LHE
> format (# x1, x2, Q2, f1, f2).
>
>
> Best Regards.
>
> --------------------------------------------------------------------------------------------
> Shion Chen
> Department of Physics, School of Science, The University of Tokyo
> 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan
> +81-3-5841-4202
> chen at icepp.s.u-tokyo.ac.jp
> shion.chen at cern.ch
> --------------------------------------------------------------------------------------------
>
>
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