Particle Physics Consolidated Grant 2019
Lead Research Organisation:
University of Bristol
Department Name: Physics
Abstract
The Bristol particle physics group will search for evidence of physics beyond the Standard Model, and work to understand the properties of new phenomena. We will carry out this study using a range of approaches and experiments.
At the CERN CMS experiment at the LHC, we will search for signatures of the production of dark matter and supersymmetric particles, using events with 'missing energy'. In the absence of a discovery, we will combine statistical information from our observations with results from cosmology and direct dark matter searches, to rule out potential theories of new physics. We will also use the very large datasets produced at the LHC to study the production and properties of the top quark, a standard model particle with unique properties.
We will use a complementary approach to search for new physics at the CERN LHCb experiment, looking for subtle signatures of new physics that manifest themselves in the decays of mesons containing heavy quarks. We will use similar approaches to test current ideas about the nature of fundamental quantum symmetries.
We will continue to use the NA62 experiment at the CERN SPS to study the decays of kaons to look for signs of new physics, and the SOLID experiment at the BR2 reactor to study neutrino oscillations on an ultra-short baseline of 5-10m. We will also participate in the Mu3e experiment to search for lepton flavour violation.
The group will pursue R&D for future experiments, including upgrades for CMS and LHCb, and the SHiP experiment at the CERN SPS which will use a very high intensity beam to search for 'dark particles' that are signatures of physics beyond the Standard Model. We will continue to work on the detailed design and optimisation of detectors for a future linear collider (ILC or CLIC) and the proposed future circular collider.
We will also continue our programme on the development of new sensors and technologies, including collaboration with industry and other academic disciplines in order to generate impact from our work.
At the CERN CMS experiment at the LHC, we will search for signatures of the production of dark matter and supersymmetric particles, using events with 'missing energy'. In the absence of a discovery, we will combine statistical information from our observations with results from cosmology and direct dark matter searches, to rule out potential theories of new physics. We will also use the very large datasets produced at the LHC to study the production and properties of the top quark, a standard model particle with unique properties.
We will use a complementary approach to search for new physics at the CERN LHCb experiment, looking for subtle signatures of new physics that manifest themselves in the decays of mesons containing heavy quarks. We will use similar approaches to test current ideas about the nature of fundamental quantum symmetries.
We will continue to use the NA62 experiment at the CERN SPS to study the decays of kaons to look for signs of new physics, and the SOLID experiment at the BR2 reactor to study neutrino oscillations on an ultra-short baseline of 5-10m. We will also participate in the Mu3e experiment to search for lepton flavour violation.
The group will pursue R&D for future experiments, including upgrades for CMS and LHCb, and the SHiP experiment at the CERN SPS which will use a very high intensity beam to search for 'dark particles' that are signatures of physics beyond the Standard Model. We will continue to work on the detailed design and optimisation of detectors for a future linear collider (ILC or CLIC) and the proposed future circular collider.
We will also continue our programme on the development of new sensors and technologies, including collaboration with industry and other academic disciplines in order to generate impact from our work.
Planned Impact
Impact generation is an explicit goal of the group activity. Our target partnerships are:
- Outreach to the general public, which has societal impact and indirect economic benefit through engagement with STEM subjects. The public have a strong interest in particle physics, which we will sustain through proactive engagement with talks, lab visits, and other targeted activities.
- Outreach to school students and teachers, aiming to stimulate young people's interest in STEM subjects. The Bristol-led HISPARC-UK offers sustained two-way engagement with students and teachers, enabling them to participate in a genuine research with clusters of schools building and operating research-quality cosmic ray detectors. Our annual Masterclass offers the opportunity to engage with sixth-form students (around 200 per year) and teachers in an organised annual event. We also host a number of sixth-form work experience students each year.
- Collaboration with UK Industry, transferring our knowledge to address commercial, industrial, medical and security applications. We will engage UK industry as commercial partners in the development and construction of systems and detectors, including using the LHC upgrade and ILC projects as a means of achieving knowledge transfer to UK industry, and offering openings to further contracts at CERN and other labs.
- The provision of trained physicists to industry. Our highly collaborative and technology-focussed research environment, backed up with training in transferable skills, equips both graduates and staff with an strong set of relevant credentials.
- The transfer of technology and techniques into other areas of scientific, medical and social research, including medical instrumentation and therapies, nuclear monitoring and safeguarding, and environmental and geological sciences.
- Pursuing Global Challenges, applying STFC-funded research to solving problems and stimulating economic development in the developing world.
- Outreach to the general public, which has societal impact and indirect economic benefit through engagement with STEM subjects. The public have a strong interest in particle physics, which we will sustain through proactive engagement with talks, lab visits, and other targeted activities.
- Outreach to school students and teachers, aiming to stimulate young people's interest in STEM subjects. The Bristol-led HISPARC-UK offers sustained two-way engagement with students and teachers, enabling them to participate in a genuine research with clusters of schools building and operating research-quality cosmic ray detectors. Our annual Masterclass offers the opportunity to engage with sixth-form students (around 200 per year) and teachers in an organised annual event. We also host a number of sixth-form work experience students each year.
- Collaboration with UK Industry, transferring our knowledge to address commercial, industrial, medical and security applications. We will engage UK industry as commercial partners in the development and construction of systems and detectors, including using the LHC upgrade and ILC projects as a means of achieving knowledge transfer to UK industry, and offering openings to further contracts at CERN and other labs.
- The provision of trained physicists to industry. Our highly collaborative and technology-focussed research environment, backed up with training in transferable skills, equips both graduates and staff with an strong set of relevant credentials.
- The transfer of technology and techniques into other areas of scientific, medical and social research, including medical instrumentation and therapies, nuclear monitoring and safeguarding, and environmental and geological sciences.
- Pursuing Global Challenges, applying STFC-funded research to solving problems and stimulating economic development in the developing world.
Organisations
Publications
Aaij R
(2020)
Precision measurement of the $$ {\varXi}_{cc}^{++} $$ mass
in Journal of High Energy Physics
Aaij R
(2021)
Search for heavy neutral leptons in $$W^+\rightarrow \mu ^{+}\mu ^{\pm }\, \text {jet}$$ decays
in The European Physical Journal C
Aaij R
(2021)
Search for long-lived particles decaying to $$e ^\pm $$ $$\mu ^\mp $$ $$\nu $$
in The European Physical Journal C
Aaij R
(2023)
Search for K S ( L ) 0 ? µ + µ - µ + µ - decays at LHCb
in Physical Review D
Aaij R
(2020)
Isospin Amplitudes in ?_{b}^{0}?J/??(S^{0}) and ?_{b}^{0}?J/??^{0}(?) Decays.
in Physical review letters
Aaij R
(2022)
Measurement of the charm mixing parameter y C P - y C P K p using two-body D 0 meson decays
in Physical Review D
Aaij R
(2021)
Measurement of the branching fraction of the $${ {B} ^0} {\rightarrow }{ {D} ^+_{s}} { {\pi } ^-} $$ decay
in The European Physical Journal C
Aaij R
(2020)
Measurement of branching fraction ratios for B+ ? D*+D-K+, B+ ? D*-D+K+, and B0 ? D*-D0K+ decays
in Journal of High Energy Physics
Aaij R
(2021)
Search for the rare decay B 0 ? J/?? *
in Chinese Physics C
Aaij R
(2021)
Search for C P violation in ? b - ? p K - K - decays
in Physical Review D
Aaij R
(2022)
Measurement of the B s 0 ? µ + µ - decay properties and search for the B 0 ? µ + µ - and B s 0 ? µ + µ - ? decays
in Physical Review D
Aaij R
(2021)
Observation of a new ? b 0 state
in Physical Review D
Aaij R
(2021)
Observation of a New Excited D_{s}^{+} Meson in B^{0}?D^{-}D^{+}K^{+}p^{-} Decays.
in Physical review letters
Aaij R
(2021)
Measurement of the CKM angle ? in B± ? DK± and B± ? Dp± decays with D ? $$ {K}_{\mathrm{S}}^0 $$h+h-
in Journal of High Energy Physics
Aaij R
(2023)
Evidence for Modification of b Quark Hadronization in High-Multiplicity pp Collisions at sqrt[s]=13 TeV.
in Physical review letters
Aaij R
(2021)
Search for time-dependent C P violation in D 0 ? K + K - and D 0 ? p + p - decays
in Physical Review D
Aaij R
(2023)
Observation of sizeable ? contribution to ? c 1 ( 3872 ) ? p + p - J / ? decays
in Physical Review D
Aaij R
(2021)
Measurement of differential $$ b\overline{b} $$- and $$ c\overline{c} $$-dijet cross-sections in the forward region of pp collisions at $$ \sqrt{s} $$ = 13 TeV
in Journal of High Energy Physics
Aaij R
(2023)
Search for the baryon- and lepton-number violating decays B 0 ? p µ - and B s 0 ? p µ -
in Physical Review D
Aaij R
(2023)
Search for $$D^{*}(2007)^{0} \rightarrow \mu ^{+} \mu ^{-}$$ in $$B^{-}\rightarrow \pi ^{-} \mu ^{+} \mu ^{-}$$ decays
in The European Physical Journal C
Aaij R
(2023)
Search for direct C P violation in charged charmless B ? P V decays
in Physical Review D
Aaij R
(2020)
Strong constraints on the b ? s? photon polarisation from B0 ? K*0e+e- decays
in Journal of High Energy Physics
Aaij R
(2020)
Measurement of the branching fraction of the decay B s 0 ? K S 0 K S 0
in Physical Review D
Aaij R
(2020)
Constraints on the K_{S}^{0}?µ^{+}µ^{-} Branching Fraction.
in Physical review letters
Aaij R
(2021)
Observation of Multiplicity Dependent Prompt ?_{c1}(3872) and ?(2S) Production in pp Collisions.
in Physical review letters