LHCb bb production angle plots

citation:

@online{bbangles,

author = "Christian Els{\"a}sser",

collaboration = "LHCb collaboration",

title = "$\overline{b}b$ production angle plots",

url = "{\href{https://lhcb.web.cern.ch/lhcb/speakersbureau/html/bb\_ProductionAngles.html}{https://lhcb.web.cern.ch/lhcb/speakersbureau/html/bb\_ProductionAngles.html}}", urldate = "{your date}"}

√s = 7 TeV

	Produced inside LHCb acceptance^(*):	27 % of b or b quarks;	25 % of bb quark pairs.
	Produced inside GPD acceptance^(*):	53 % of b or b quarks;	45 % of bb quark pairs.

(jpg, pdf, png)

√s = 8 TeV

	Produced inside LHCb acceptance^(*):	27 % of b or b quarks;	25 % of bb quark pairs.
	Produced inside GPD acceptance^(*):	52 % of b or b quarks;	44 % of bb quark pairs.

(jpg, pdf, png)

√s = 14 TeV

	Produced inside LHCb acceptance^(*):	27 % of b or b quarks;	24 % of bb quark pairs.
	Produced inside GPD acceptance^(*):	49 % of b or b quarks;	41 % of bb quark pairs.

(jpg, pdf, png)

^(*) The detector acceptances are defined here as

1.8 < η < 4.9 for LHCb and |η| < 2.4 for the GPD

The distributions shown in these plots were created using PYTHIA8 and CTEQ6 NLO, including the following processes weighted according to their cross-sections:

qq → bb; gg → bb; qq → bbg (where q ≠ b); bb → bbg; gg → bbg

All five flavors (u,d,s,c,b) are considered in the PDFs. The total combined cross-sections given by PYTHIA are:

251.8 μb at 7 TeV; 291.6 μb at 8 TeV; 527.3 μb at 14 TeV.

For questions or comments, please contact Christian Elsasser at che@physik.uzh.ch.