Periodic Reporting for period 1 - LHCbBaryonAmplitudes (Strange baryons and exotic resonances in beauty baryon decays)
Reporting period: 2015-10-07 to 2017-10-06
The pentaquark states observed would be in terms of quark described as states having charm quark and antiquark along with two up quarks and one down quark. But if such hadrons exists, there should be also hadrons where one of the up quark is exchange for strange quark. With view of this, in this project we embarked on search for decays of Lambda_b baryon to J/psi meson along with Lambda baryon and pair of other particles (pions or kaons). These would be possible places where to search for pentaquarks decaying to J/psi and Lambda, but as nobody ever searched for these decays of Lambda_b baryon it is not yet clear how large statistics these will provide. To make first step, this project just exactly that search.
Overall, the project was partially successful. Significant amount of work was done towards achieving scientific objectives, but the analysis is not fully finished and cleared by the LHCb collaboration for public presentation. This is down to unforeseen delay in producing simulated samples needed to estimate efficiencies to detect various decays. The delay was affecting large fraction of the collaboration. The project would need another 3-4 months of work to finalise results to the point when they could be presented outside the LHCb collaboration. The researcher was restarting his scientific career and this restart was successful. The work on the project also resulted in researcher gaining new transferable skills, which are widely applicable.
The researcher significantly contributed to one scientific publication (Phys. Lett. B772 (2017) 265) on discovery of Xi_b- --> J/psi Lambda K- decay, a topic which was closely related to the objectives of this project. As the analysis performed as main part of the project was delayed, it does not had any scientific output yet. Besides the scientific output, researcher had active role in explaining research done by the LHCb collaboration to a wider audience and specially to secondary school students. Researched actively participated in organising yearly International Masterclass event (http://www.physicsmasterclasses.org/index.php) during the project and the ``Antimatter matters'' exhibition at The Big Bang Fair (https://www.thebigbangfair.co.uk) major event which aims at bringing STEM subjects to attention of secondary school students.