Bristol Particle Physics Consolidated Grant 2015-19
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.
A number of new experiments are being prepared, and will be ready for use within or shortly after the grant period. The NA62 experiment at the CERN SPS will study the decays of kaons to look for signs of new physics. The SOLID experiment at the BR2 reactor will study neutrino oscillations on an ultra-short baseline of 5-10m. The SHiP experiment at the CERN SPS will use a very high intensity beam to search for 'dark particles' that are signatures of physics beyond the Standard Model. Finally, we have begun to make preparations for the detailed design and optimisation of detectors for a future linear collider.
We will continue our programme of particle detector R&D, contributing to the upgrade of CMS and LHCb, to the design and construction of new experiments, and to the development of new sensors and technologies. An important part of this programme will be 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.
A number of new experiments are being prepared, and will be ready for use within or shortly after the grant period. The NA62 experiment at the CERN SPS will study the decays of kaons to look for signs of new physics. The SOLID experiment at the BR2 reactor will study neutrino oscillations on an ultra-short baseline of 5-10m. The SHiP experiment at the CERN SPS will use a very high intensity beam to search for 'dark particles' that are signatures of physics beyond the Standard Model. Finally, we have begun to make preparations for the detailed design and optimisation of detectors for a future linear collider.
We will continue our programme of particle detector R&D, contributing to the upgrade of CMS and LHCb, to the design and construction of new experiments, and to the development of new sensors and technologies. An important part of this programme will be collaboration with industry and other academic disciplines, in order to generate impact from our work.
Planned Impact
- There will be a societal impact amongst the general public as we publicise the results of our research through outreach.
- We will engage with school age students and teachers to convey the excitement of fundamental research, motivating more students to study STEM subjects at post-16 and HE levels.
- Engagement with UK industry through contracts and joint projects, and through the provision of well-trained physicists as employees, will result in economic impact
- Other academic disciplines will benefit from our skills, knowledge and capabilities, addressing a number of important problems across a range of fields
Full details are given in our Case for Support and Pathways to Impact document
- We will engage with school age students and teachers to convey the excitement of fundamental research, motivating more students to study STEM subjects at post-16 and HE levels.
- Engagement with UK industry through contracts and joint projects, and through the provision of well-trained physicists as employees, will result in economic impact
- Other academic disciplines will benefit from our skills, knowledge and capabilities, addressing a number of important problems across a range of fields
Full details are given in our Case for Support and Pathways to Impact document
Publications
Pestel V
(2018)
Neutron calibration of the SoLid detector
Aaij R
(2017)
New algorithms for identifying the flavour of [Formula: see text] mesons using pions and protons.
in The European physical journal. C, Particles and fields
Zagozdzinska A
(2016)
New Fast Beam Conditions Monitoring (BCM1F) system for CMS
in Journal of Instrumentation
Richards S
(2015)
Non-linear centre of gravity on LHCb Vertex Locator test beam data
in Journal of Instrumentation
Malek F
(2015)
Non-SUSY Beyond Standard Model Searches: Recent Results from ATLAS and CMS
in Journal of Physics: Conference Series
Khachatryan V
(2015)
Nuclear effects on the transverse momentum spectra of charged particles in pPb collisions at [Formula: see text][Formula: see text].
in The European physical journal. C, Particles and fields
Tonjes M
(2016)
Nuclear modification of jet and hadron spectra with CMS
in Nuclear and Particle Physics Proceedings
Aaij R
(2016)
Observation of ? b 0 ? ?(2S)pK- and ? b 0 ? J/?p + p -pK- decays and a measurement of the ? b 0 baryon mass
in Journal of High Energy Physics
Aaij R
(2017)
Observation of ? c ( 2 S ) ? p p ¯ and search for X ( 3872 ) ? p p ¯ decays
in Physics Letters B
Aaij R
(2017)
Observation of [Formula: see text] and [Formula: see text] decays.
in The European physical journal. C, Particles and fields
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
(2021)
Observation of a new ? b 0 state
in Physical Review D
Aaij R
(2018)
Observation of a New ?_{b}^{-} Resonance.
in Physical review letters
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
(2019)
Observation of an Excited B_{c}^{+} State.
in Physical review letters
Aaij R
(2017)
Observation of B c + ? J / ? D ( * ) K ( * ) decays
in Physical Review D
Aaij R
(2018)
Observation of B s 0 ? D ¯ * 0 ? and search for B 0 ? D ¯ 0 ? decays
in Physical Review D
Chang YY
(2015)
Observation of B^{0}?p?[over ¯]D^{(*)-}.
in Physical review letters
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
(2017)
Observation of B_{c}^{+}?D^{0}K^{+} Decays.
in Physical review letters
Aaij R
(2016)
Observation of B_{s}^{0}?D[over ¯]^{0}K_{S}^{0} and Evidence for B_{s}^{0}?D[over ¯]^{*}^{0}K_{S}^{0} Decays.
in Physical review letters
Aaij R
(2017)
Observation of charmless baryonic decays B ( s ) 0 ? p p ¯ h + h ' -
in Physical Review D
Aaij R
(2019)
Observation of CP Violation in Charm Decays.
in Physical review letters
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
(2017)
Observation of D^{0} Meson Decays to p^{+}p^{-}µ^{+}µ^{-} and K^{+}K^{-}µ^{+}µ^{-} Final States.
in Physical review letters
Aaij R
(2020)
Observation of Enhanced Double Parton Scattering in Proton-Lead Collisions at sqrt[s_{NN}]=8.16 TeV.
in Physical review letters
Aaij R
(2021)
Observation of excited O c 0 baryons in O b - ? ? c + K - p - decays
in Physical Review D
Aaij R
(2017)
Observation of Five New Narrow O_{c}^{0} States Decaying to ?_{c}^{+}K^{-}.
in Physical review letters
Aaij R
(2017)
Observation of J/?? Structures Consistent with Exotic States from Amplitude Analysis of B^{+}?J/??K^{+} Decays.
in Physical review letters
Aaij R
(2015)
Observation of J/?p Resonances Consistent with Pentaquark States in ?_{b}^{0}?J/?K^{-}p Decays.
in Physical review letters
Aaij R
(2021)
Observation of Multiplicity Dependent Prompt ?_{c1}(3872) and ?(2S) Production in pp Collisions.
in Physical review letters
Aaij R
(2020)
Observation of New ?_{c}^{0} Baryons Decaying to ?_{c}^{+}K^{-}.
in Physical review letters
Aaij R
(2021)
Observation of New Resonances Decaying to J/?K^{+} and J/??.
in Physical review letters
Aaij R
(2019)
Observation of New Resonances in the ?_{b}^{0}p^{+}p^{-} System.
in Physical review letters
Aaij R
(2020)
Observation of Several Sources of CP Violation in B^{+}?p^{+}p^{+}p^{-} Decays.
in Physical review letters
LHCb Collaboration
(2020)
Observation of structure in the J/?-pair mass spectrum.
in Science bulletin
Aaij R
(2021)
Observation of the $$ {B}_s^0 $$ ? D*±D± decay
in Journal of High Energy Physics
Aaij R
(2017)
Observation of the ? b - ? J / ? ? K - decay
in Physics Letters B
Aaij R
(2016)
Observation of the ? b 0 ? ? ? decay
in Physics Letters B
Aaij R
(2021)
Observation of the ? b 0 ? ? c + K + K - p - decay
in Physics Letters B
Aaij R
(2017)
Observation of the Annihilation Decay Mode B^{0}?K^{+}K^{-}.
in Physical review letters
Aaij R
(2017)
Observation of the B + ? D * - K + p + decay
in Physical Review D
Aaij R
(2016)
Observation of the B s 0 ? J/??? decay
in Journal of High Energy Physics
Aaij R
(2015)
Observation of the B(s)(0)??'?' Decay.
in Physical review letters
Aaij R
(2015)
Observation of the B0??0?0 decay from an amplitude analysis of B0? (p+p-)(p+p-) decays
in Physics Letters B
Aaij R
(2018)
Observation of the decay ? b 0 ? ? c + p p ? p -
in Physics Letters B
Aaij R
(2017)
Observation of the decay ? b 0 ? pK - µ + µ - and a search for CP violation
in Journal of High Energy Physics
Aaij R
(2017)
Observation of the Decay ?_{b}^{-}?pK^{-}K^{-}.
in Physical review letters
Aaij R
(2015)
Observation of the decay B ? s 0 ? ? ( 2 S ) K + p -
in Physics Letters B
Aaij R
(2017)
Observation of the decay B s 0 ? ? c ? and evidence for B s 0 ? ? c p + p -
in Journal of High Energy Physics
Description | Resources from this award funded our knowledge exchange programme, developing new detectors that are finding uses in medicine (radiotherapy), security and industrial applications. Findings have been discussed in outreach events, inspiring new generations and generating public interest. |
First Year Of Impact | 2015 |
Sector | Aerospace, Defence and Marine,Education,Energy,Healthcare,Security and Diplomacy |
Impact Types | Societal,Economic |
Description | DUNE UK Production Project |
Amount | £689,382 (GBP) |
Funding ID | ST/S00355X/1 |
Organisation | Science and Technologies Facilities Council (STFC) |
Sector | Public |
Country | United Kingdom |
Start | 10/2019 |
End | 09/2024 |
Description | Graphcore's IPUs |
Organisation | Graphcore |
Country | United Kingdom |
Sector | Private |
PI Contribution | Evaluating Graphcore's novel IPU processors, and, for the first time, implementing Particle Physics relevant software on them. Of particular interest not only to us, but also the community interested in these novel processors, is that we did not only use IPUs for machine learning (although we did that, too), but also non ML applications (Kalman Filter). Our work was also beneficial to our industrial partner in optimising and debugging their API. |
Collaborator Contribution | Cloud Access to IPUs and technical support. |
Impact | Paper: https://inspirehep.net/literature/1812756 (accepted for publication) |
Start Year | 2019 |
Description | Antimatter Matters |
Form Of Engagement Activity | Participation in an activity, workshop or similar |
Part Of Official Scheme? | No |
Geographic Reach | National |
Primary Audience | Public/other audiences |
Results and Impact | LHCb-UK and Alpha-UK organised a joint stand at the Royal Society summer exhibition 2016. The Bristol Particle Physics group participated in the organisation (printing T-shirts, stickers) and the presentation of the exhibits during the event. Antimatter Matters has its own website and has been presented at several other events throughout the UK. |
Year(s) Of Engagement Activity | 2016 |
URL | http://www.antimatter-matters.org/ |
Description | Bristol Bright Night 2014 |
Form Of Engagement Activity | Participation in an activity, workshop or similar |
Part Of Official Scheme? | Yes |
Geographic Reach | Local |
Primary Audience | Public/other audiences |
Results and Impact | Various STFC and ERC funded members of the university of Bristol gave public talks to audiences of various sizes (ranging from "pitch talks" of 5 min, to particle physicists contributing to a planetarium demonstration), we had a stall with particle physics-related activities and engaged with members of the public. Feedback was excellent. Positive audience feedback. |
Year(s) Of Engagement Activity | 2014 |
URL | http://www.bristol.ac.uk/public-engagement/events/2014/bristol-bright-night.html |
Description | Colloquium |
Form Of Engagement Activity | A talk or presentation |
Part Of Official Scheme? | No |
Geographic Reach | Local |
Primary Audience | Other audiences |
Results and Impact | Public colloquium at the school of physics. |
Year(s) Of Engagement Activity | 2017 |
Description | Cosmic 100 project at Bristol Balloon Fiesta |
Form Of Engagement Activity | Participation in an activity, workshop or similar |
Part Of Official Scheme? | Yes |
Geographic Reach | Local |
Primary Audience | Public/other audiences |
Results and Impact | Lots of discussions with the public at the LHC exhibit. Media coverage of balloon flight with particle detector. Don't know how to answer this. |
Year(s) Of Engagement Activity | 2012 |
URL | http://www.bris.ac.uk/news/2012/8694.html |
Description | Pint of Science |
Form Of Engagement Activity | A talk or presentation |
Part Of Official Scheme? | No |
Geographic Reach | Local |
Primary Audience | Public/other audiences |
Results and Impact | A talk and discussion on the theme of antimatter to a general audience in a pub (including a demonstration with a spark chamber through which muons and anti-muons passed), part of the "Pint of Science" series of events. |
Year(s) Of Engagement Activity | 2017 |
URL | https://pintofscience.co.uk/about/ |
Description | Women in STEMM |
Form Of Engagement Activity | Participation in an open day or visit at my research institution |
Part Of Official Scheme? | No |
Geographic Reach | Local |
Primary Audience | Schools |
Results and Impact | Event engaging year 8/9 students in science activities, with an emphasis on female role models. The Bristol particle physics group had a stand with hands-on activities, spark chamber, and a video presentation introducing famous female particle physicists. |
Year(s) Of Engagement Activity | 2017 |
URL | https://www.bristol.ac.uk/biochemistry/public/events/2017/event---women-in-stemm.html |