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
(2019)
Search for C P Violation in D s + ? K S 0 p + , D + ? K S 0 K + , and D + ? ? p + Decays
in Physical Review Letters
Aaij R
(2020)
Determination of quantum numbers for several excited charmed mesons observed in B - ? D * + p - p - decays
in Physical Review D
Aaij R
(2020)
Search for C P violation and observation of P violation in ? b 0 ? p p - p + p - decays
in Physical Review D
Aaij R
(2019)
Observation of B_{(s)}^{0}?J/?pp[over ¯] Decays and Precision Measurements of the B_{(s)}^{0} Masses.
in Physical review letters
Aaij R
(2020)
Amplitude analysis of the B + ? D + D - K + decay
in Physical Review D
Aaij R
(2021)
First Observation of the Decay B_{s}^{0}?K^{-}µ^{+}?_{µ} and a Measurement of |V_{ub}|/|V_{cb}|.
in Physical review letters
Aaij R
(2019)
Observation of CP Violation in Charm Decays.
in Physical review letters
Aaij R
(2023)
Amplitude analysis of the ? c + ? p K - p + decay and ? c + baryon polarization measurement in semileptonic beauty hadron decays
in Physical Review D
Aaij R
(2023)
$${ {J}/\psi }$$ and $${ {D}} ^0$$ production in $$\sqrt{s_{\scriptscriptstyle \text {NN}}} =68.5\,\text {GeV} $$ PbNe collisions
in The European Physical Journal C
Aaij R
(2020)
First observation of the decay ? b 0 ? ? c ( 1 S ) p K -
in Physical Review D
Aaij R
(2019)
Measurement of CP-Violating and Mixing-Induced Observables in B_{s}^{0}??? Decays.
in Physical review letters
Aaij R
(2021)
Precise measurement of the f s / f d ratio of fragmentation fractions and of B s 0 decay branching fractions
in Physical Review D
Aaij R
(2021)
Observation of CP violation in two-body $$ {B}_{(s)}^0 $$-meson decays to charged pions and kaons
in Journal of High Energy Physics
Aaij R
(2019)
Search for the doubly charmed baryon $$\Xi_{cc}^+$$
in Science China Physics, Mechanics & Astronomy
Aaij R
(2019)
Precision measurement of the ? c + , ? c + , and ? c 0 baryon lifetimes
in Physical Review D
Aaij R
(2020)
Measurement of the relative branching fractions of B + ? h + h ' + h ' - decays
in Physical Review D
Aaij R
(2021)
Angular Analysis of the B^{+}?K^{*+}µ^{+}µ^{-} Decay.
in Physical review letters
Aaij R
(2020)
Search for A^{'}?µ^{+}µ^{-} Decays.
in Physical review letters
Aaij R
(2023)
Measurement of $$\tau _\text {L}$$ using the $${B} _s^0 \rightarrow J/\psi \eta $$ decay mode
in The European Physical Journal C
Aaij R
(2023)
Measurement of the Prompt D^{0} Nuclear Modification Factor in p-Pb Collisions at sqrt[s_{NN}]=8.16 TeV.
in Physical review letters
Aaij R
(2021)
Measurement of the prompt-production cross-section ratio s ( ? c 2 ) / s ( ? c 1 ) in p Pb collisions at s N N = 8.16 TeV
in Physical Review C
Aaij R
(2020)
Search for the Rare Decays B_{s}^{0}?e^{+}e^{-} and B^{0}?e^{+}e^{-}.
in Physical review letters
Aaij R
(2019)
Search for the Lepton-Flavor-Violating Decays B_{s}^{0}?t^{±}µ^{±} and B^{0}?t^{±}µ^{±}.
in Physical review letters
Aaij R
(2020)
First Observation of Excited O_{b}^{-} States.
in Physical review letters
Aaij R
(2020)
First branching fraction measurement of the suppressed decay ? c 0 ? p - ? c +
in Physical Review D
Aaij R
(2023)
Observation of a Resonant Structure near the D_{s}^{+}D_{s}^{-} Threshold in the B^{+}?D_{s}^{+}D_{s}^{-}K^{+} Decay.
in Physical review letters
Aaij R
(2023)
Observation of New O_{c}^{0} States Decaying to the ?_{c}^{+}K^{-} Final State.
in Physical review letters
Aaij R
(2023)
Search for C P violation using T ^ -odd correlations in B 0 ? p p ¯ K + p - decays
in Physical Review D
Aaij R
(2019)
Search for Lepton-Universality Violation in B^{+}?K^{+}l^{+}l^{-} Decays.
in Physical review letters
Aaij R
(2023)
Direct C P violation in charmless three-body decays of B ± mesons
in Physical Review D
Aaij R
(2022)
First Measurement of the Z?µ^{+}µ^{-} Angular Coefficients in the Forward Region of pp Collisions at sqrt[s]=13 TeV.
in Physical review letters
Aaij R
(2022)
Study of Z Bosons Produced in Association with Charm in the Forward Region.
in Physical review letters
Aaij R
(2022)
Angular Analysis of D^{0}?p^{+}p^{-}µ^{+}µ^{-} and D^{0}?K^{+}K^{-}µ^{+}µ^{-} Decays and Search for CP Violation.
in Physical review letters
Aaij R
(2020)
Search for the doubly heavy $$ {\Xi}_{bc}^0 $$ baryon via decays to D0pK-
in Journal of High Energy Physics
Aaij R
(2023)
Precision Measurement of CP Violation in the Penguin-Mediated Decay B_{s}^{0}???.
in Physical review letters
Aaij R
(2023)
Search for the rare hadronic decay B s 0 ? p p ¯
in Physical Review D
Aaij R
(2023)
Measurement of the mass difference and relative production rate of the O b - and ? b - baryons
in Physical Review D
Aaij R
(2022)
Observation of the B 0 ? D ¯ * 0 K + p - and B s 0 ? D ¯ * 0 K - p + decays
in Physical Review D
Aaij R
(2020)
Measurement of $${\psi {(2S)}} $$ production cross-sections in proton-proton collisions at $$\sqrt{s} =7$$ and $$13\text { TeV} $$
in The European Physical Journal C
Aaij R
(2022)
Analysis of Neutral B-Meson Decays into Two Muons.
in Physical review letters
Aaij R
(2019)
Observation of New Resonances in the ?_{b}^{0}p^{+}p^{-} System.
in Physical review letters
Aaij R
(2022)
Observation of Two New Excited ?_{b}^{0} States Decaying to ?_{b}^{0}K^{-}p^{+}.
in Physical review letters
Aaij R
(2019)
Observation of a Narrow Pentaquark State, P_{c}(4312)^{+}, and of the Two-Peak Structure of the P_{c}(4450)^{+}.
in Physical review letters
Aaij R
(2023)
Amplitude analysis of B 0 ? D ¯ 0 D s + p - and B + ? D - D s + p + decays
in Physical Review D
Aaij R
(2020)
Measurement of the shape of the $$ {B}_s^0\to {D}_s^{\ast -}{\mu}^{+}{\nu}_{\mu } $$ differential decay rate
in Journal of High Energy Physics
Aaij R
(2019)
Measurements of CP asymmetries in charmless four-body $${\varLambda } ^0_{b} $$ and $${\varXi } ^0_{b} $$ decays
in The European Physical Journal C
Aaij R
(2023)
Measurement of lepton universality parameters in B + ? K + l + l - and B 0 ? K * 0 l + l - decays
in Physical Review D
Aaij R
(2020)
Test of lepton universality with $$ {\Lambda}_b^0\to {pK}^{-}{\mathrm{\ell}}^{+}{\mathrm{\ell}}^{-} $$ decays
in Journal of High Energy Physics
Aaij R
(2023)
Publisher Erratum: Open charm production and asymmetry in pNe collisions at $$\sqrt{s_{\scriptscriptstyle {\text {NN}}}} = 68.5$$ GeV
in The European Physical Journal C
Aaij R
(2020)
Observation of New ?_{c}^{0} Baryons Decaying to ?_{c}^{+}K^{-}.
in Physical review letters