eprintid: 27350
rev_number: 12
eprint_status: archive
userid: 4771
dir: disk0/00/02/73/50
datestamp: 2019-11-11 09:15:06
lastmod: 2019-12-12 09:28:41
status_changed: 2019-11-11 09:15:06
type: doctoralThesis
metadata_visibility: show
creators_name: Piucci, Alessio
title: Amplitude analysis of Lambda_b^0 --> Lambda_c^+ D^0 K^- decays and pentaquark searches in the Lambda_c^+ D^0 system at the LHCb experiment
subjects: ddc-530
divisions: i-130200
adv_faculty: af-13
abstract: This thesis reports the amplitude analysis of Lambda_b^0 --> Lambda_c^+ D^0 K^− decays using data collected by the LHCb
experiment from proton-proton collisions, corresponding to an integrated luminosity of 9.1 fb −1 . A new
amplitude fitter has been developed in the context of this analysis, which exploits novel computing
concepts and software frameworks.
Numerous models predict large couplings of the pentaquark candidates observed by LHCb to the
Lambda_c^+ D^0 system. This makes the Lambda_b^0 → Lambda_c^+ D^0 K^− channel meaningful to discriminate between models
which attempt to describe the internal structure of the pentaquark states.
Amplitude fits are performed to measure the contributions of intermediate resonances to Lambda_b^0 → Lambda_c^+ D^0 K^−
decays and upper limits are set for the observation of pentaquark states in this channel. The results
obtained are in contrast with the expectations from the most popular theory models which describe
the pentaquark states as Σ D^∗ -Σ^∗ D molecules.
date: 2019
id_scheme: DOI
id_number: 10.11588/heidok.00027350
ppn_swb: 1683900189
own_urn: urn:nbn:de:bsz:16-heidok-273503
date_accepted: 2019-10-16
advisor: HASH(0x561a628cccd0)
language: eng
bibsort: PIUCCIALESAMPLITUDEA2019
full_text_status: public
place_of_pub: Heidelberg
citation:   Piucci, Alessio  (2019) Amplitude analysis of Lambda_b^0 --> Lambda_c^+ D^0 K^- decays and pentaquark searches in the Lambda_c^+ D^0 system at the LHCb experiment.  [Dissertation]     
document_url: https://archiv.ub.uni-heidelberg.de/volltextserver/27350/1/thesis_Piucci_HGSFP.pdf