HT including

 I am not sure if HT-missing is the SAME as ET-missing

the problem solved via Github

HT is the scalar sum of the transverse momentum of all the jets in an event, which includes both b-quark and b-antiquark in your final state. It's a measure of the total hadronic activity in an event. On the other hand, HT-missing, often referred to as MET (Missing Transverse Energy), is an indicator of the presence of non-detectable particles such as neutrinos in the event.

In your specific final state [\tau \nu \tau \nu +2b ], HT would include the contributions from both the b-quark and b-antiquark. However, the neutrinos (\nu) would not be included in the HT calculation because they are not detectable, but they would contribute to HT-missing.

In general, the exact particles included in HT depend on the specifics of the analysis and the experimental setup. For more detailed information about your specific analysis, I would recommend referring to the methodology section of the papers you're using for your research.

Sources:
https://www.desy.de/2011summerstudents/2014/reports/chernyavskaya_nadezda.pdf
https://essaypay.com/blog/best-definition-essay-topics/
https://arxiv.org/abs/1101.1294
https://iris.unibs.it/handle/11379/483240

Thank you Joseph for your reply