The study of elementary particles and their interactions (Consolidated Grant 2019 - 2022)
Lead Research Organisation:
Imperial College London
Department Name: Physics
Abstract
This grant is to continue the group's programme of investigation into the properties of elementary particles and the fundamental forces of nature.
One of the main objectives of this grant will be to support the exploitation of the LHC experiments which will be taking data during the period of this grant. The CMS experiment will continue to measure the Higgs particle, following its successful discovery in 2012. It will also be able to extend the parameter space in searches for SUSY and other new phenomena such as finding evidence of potential dark matter candidates. The LHCb experiment will offer complementary tests of the Standard Model and beyond with the ability to look for extremely rare decays in flavour physics and to measure CP asymmetries in the decays of B mesons, both of which are sensitive to contributions from new physics. The group will also be active in preparing the next generation of detectors for the high luminosity upgrade of the LHC.
The T2K long baseline neutrino experiment will allow us to expand our understanding of the masses and mixings in the neutrino sector, and should provide key indications of CP violation in the neutrino sector. The SoLid experiment will take data throughout the grant period and should settle the very short baseline neutrino anomoly. One of the other missing pieces of the neutrino puzzle is whether the neutrino is its own antiparticle. We are preparing the SuperNEMO experiment to attempt to determine if the neutrino is a Majorana particle and first data-taking will occur during the grant. Heavy neutrino-like particles are predicted in several new physics models and we are starting preparations for the SHiP experiment to search for these new particles.
The group will be active in several experiments specifically searching for new physics. Direct conversion of muons to electrons is heavily suppressed in the Standard Model so any observation of this process would be a major discovery. The COMET experiment is searching for this process and will take data during the grant. Similarly, a measurable electric dipole moment for the electron could only arise through new physics and the eEDM experiment will continue to push down the limits for such an effect. Around a quarter of the Universe is composed of dark matter and its nature is unknown. This has so far remained undetected in the laboratory and the group will continue its activity in searching for direct evidence of a dark matter candidate through the LUX-ZEPLIN experiment.
Accelerators to produce muon beams will be needed for future neutrino and muon collider experiments. The group is continuing its research in this area through the nuSTORM studies. Proton beams also have potential applications for other scientific fields and for healthcare, and the group is studying how to apply these techniques in these areas.
One of the main objectives of this grant will be to support the exploitation of the LHC experiments which will be taking data during the period of this grant. The CMS experiment will continue to measure the Higgs particle, following its successful discovery in 2012. It will also be able to extend the parameter space in searches for SUSY and other new phenomena such as finding evidence of potential dark matter candidates. The LHCb experiment will offer complementary tests of the Standard Model and beyond with the ability to look for extremely rare decays in flavour physics and to measure CP asymmetries in the decays of B mesons, both of which are sensitive to contributions from new physics. The group will also be active in preparing the next generation of detectors for the high luminosity upgrade of the LHC.
The T2K long baseline neutrino experiment will allow us to expand our understanding of the masses and mixings in the neutrino sector, and should provide key indications of CP violation in the neutrino sector. The SoLid experiment will take data throughout the grant period and should settle the very short baseline neutrino anomoly. One of the other missing pieces of the neutrino puzzle is whether the neutrino is its own antiparticle. We are preparing the SuperNEMO experiment to attempt to determine if the neutrino is a Majorana particle and first data-taking will occur during the grant. Heavy neutrino-like particles are predicted in several new physics models and we are starting preparations for the SHiP experiment to search for these new particles.
The group will be active in several experiments specifically searching for new physics. Direct conversion of muons to electrons is heavily suppressed in the Standard Model so any observation of this process would be a major discovery. The COMET experiment is searching for this process and will take data during the grant. Similarly, a measurable electric dipole moment for the electron could only arise through new physics and the eEDM experiment will continue to push down the limits for such an effect. Around a quarter of the Universe is composed of dark matter and its nature is unknown. This has so far remained undetected in the laboratory and the group will continue its activity in searching for direct evidence of a dark matter candidate through the LUX-ZEPLIN experiment.
Accelerators to produce muon beams will be needed for future neutrino and muon collider experiments. The group is continuing its research in this area through the nuSTORM studies. Proton beams also have potential applications for other scientific fields and for healthcare, and the group is studying how to apply these techniques in these areas.
Planned Impact
While much of the research described in this grant is exploring fundamental questions where the immediate impact implications of discoveries can take decades to unfold, there are several examples of areas where technology developed in the pursuit of discoveries can have a more immediate impact. The group has potential impact in several key areas; training, outreach, transfer of HEP technology and ideas, and transfer and development of accelerator technology. These reach a diverse audience ranging from schoolchildren to cancer practitioners to neutron source users. See the submitted "Pathways to Impact" document for further details.
Organisations
Publications
Sirunyan AM
(2021)
Search for a heavy vector resonance decaying to a Z boson and a Higgs boson in proton-proton collisions at s = 13 Te .
in The European physical journal. C, Particles and fields
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
Sirunyan AM
(2021)
Measurements of p p ? Z Z production cross sections and constraints on anomalous triple gauge couplings at s = 13 TeV.
in The European physical journal. C, Particles and fields
Sirunyan A
(2021)
Measurement of differential t t ¯ production cross sections using top quarks at large transverse momenta in p p collisions at s = 13 TeV
in Physical Review D
Sirunyan AM
(2021)
Measurements of angular distance and momentum ratio distributions in three-jet and Z + two-jet final states in pp collisions.
in The European physical journal. C, Particles and fields
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
Sirunyan AM
(2021)
Search for charged Higgs bosons produced in vector boson fusion processes and decaying into vector boson pairs in proton-proton collisions at s = 13 TeV.
in The European physical journal. C, Particles and fields
Sirunyan A
(2021)
Evidence for electroweak production of four charged leptons and two jets in proton-proton collisions at s = 13 TeV
in Physics Letters B
Aaij R
(2021)
Observation of the suppressed ? b 0 ? D p K - decay with D ? K + p - and measurement of its C P asymmetry
in Physical Review D
Aaij R
(2021)
Observation of the $$ {B}_s^0 $$ ? D*±D± decay
in Journal of High Energy Physics
Sirunyan A
(2021)
Search for long-lived particles decaying to jets with displaced vertices in proton-proton collisions at s = 13 TeV
in Physical Review D
Algueró M
(2021)
A complete description of P- and S-wave contributions to the B0 ? K+p-l+l- decay
in Journal of High Energy Physics
Aaij R
(2021)
Observation of New Resonances Decaying to J/?K^{+} and J/??.
in Physical review letters
Sirunyan A
(2021)
Search for the lepton flavor violating decay t ? 3µ in proton-proton collisions at $$ \sqrt{\mathrm{s}} $$ = 13 TeV
in Journal of High Energy Physics
Aaij R
(2021)
Search for long-lived particles decaying to $$e ^\pm $$ $$\mu ^\mp $$ $$\nu $$
in The European Physical Journal C
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
Sirunyan A
(2021)
Search for the rare decay of the W boson into a pion and a photon in proton-proton collisions at s = 13 TeV
in Physics Letters B
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)
Observation of excited O c 0 baryons in O b - ? ? c + K - p - decays
in Physical Review D
The LZ Collaboration
(2021)
Projected sensitivities of the LUX-ZEPLIN (LZ) experiment to new physics via low-energy electron recoils
Sirunyan AM
(2021)
Observation of Forward Neutron Multiplicity Dependence of Dimuon Acoplanarity in Ultraperipheral Pb-Pb Collisions at sqrt[s_{NN}]=5.02 TeV.
in Physical review letters
Sirunyan A
(2021)
Measurement of prompt D0 and D ? 0 meson azimuthal anisotropy and search for strong electric fields in PbPb collisions at s NN = 5.02 TeV
in Physics Letters B
Aaij R
(2021)
Observation of a new ? b 0 state
in Physical Review D
LHCb Collaboration
(2021)
Evidence of a J/?? structure and observation of excited ?- states in the ?b-?J/??K- decay.
in Science bulletin
Aaij R
(2021)
Measurement of CP Violation in the Decay B^{+}?K^{+}p^{0}.
in Physical review letters
Sirunyan AM
(2021)
Precision luminosity measurement in proton-proton collisions at s = 13 TeV in 2015 and 2016 at CMS.
in The European physical journal. C, Particles and fields
Tumasyan A
(2021)
Measurement of the electroweak production of Z ? and two jets in proton-proton collisions at s = 13 TeV and constraints on anomalous quartic gauge couplings
in Physical Review D
Abe K
(2021)
Measurements of ?¯ µ and ?¯ µ + ? µ charged-current cross-sections without detected pions or protons on water and hydrocarbon at a mean anti-neutrino energy of 0.86 GeV
in Progress of Theoretical and Experimental Physics
Sirunyan AM
(2021)
Constraints on the Initial State of Pb-Pb Collisions via Measurements of Z-Boson Yields and Azimuthal Anisotropy at sqrt[s_{NN}]=5.02 TeV.
in Physical review letters
Sirunyan A
(2021)
First measurement of the cross section for top quark pair production with additional charm jets using dileptonic final states in pp collisions at s = 13 TeV
in Physics Letters B
Sirunyan A
(2021)
Constraints on anomalous Higgs boson couplings to vector bosons and fermions in its production and decay using the four-lepton final state
in Physical Review D
Sirunyan A
(2021)
Search for long-lived particles using displaced jets in proton-proton collisions at s = 13 TeV
in Physical Review D
Aaij R
(2021)
Search for heavy neutral leptons in $$W^+\rightarrow \mu ^{+}\mu ^{\pm }\, \text {jet}$$ decays
in The European Physical Journal C
Abe K
(2021)
Neutron-antineutron oscillation search using a 0.37 megaton-years exposure of Super-Kamiokande
in Physical Review D
Sirunyan AM
(2021)
Search for dark matter produced in association with a leptonically decaying Z boson in proton-proton collisions at s = 13 Te .
in The European physical journal. C, Particles and fields
Sirunyan AM
(2021)
Measurement of the Higgs boson production rate in association with top quarks in final states with electrons, muons, and hadronically decaying tau leptons at s = 13 TeV.
in The European physical journal. C, Particles and fields
Sirunyan A
(2021)
Studies of charm and beauty hadron long-range correlations in pp and pPb collisions at LHC energies
in Physics Letters B
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
Sirunyan A
(2021)
Measurement of the azimuthal anisotropy of and mesons in PbPb collisions at s NN = 5.02 TeV
in Physics Letters B
Aaij R
(2021)
Observation of the ? b 0 ? ? c + K + K - p - decay
in Physics Letters B
Akerib D
(2021)
Simulations of events for the LUX-ZEPLIN (LZ) dark matter experiment
in Astroparticle Physics
Long K
(2021)
Muon colliders to expand frontiers of particle physics
in Nature Physics
Sirunyan AM
(2021)
Search for top squark pair production using dilepton final states in pp collision data collected at s = 13 TeV.
in The European physical journal. C, Particles and fields
Akerib D
(2021)
Improving sensitivity to low-mass dark matter in LUX using a novel electrode background mitigation technique
in Physical Review D
Abe K
(2021)
Supernova Model Discrimination with Hyper-Kamiokande
in The Astrophysical Journal
Manly S
(2021)
Deep Underground Neutrino Experiment (DUNE) Near Detector Conceptual Design Report
in Instruments
Sirunyan A
(2021)
Measurement of the inclusive and differential Higgs boson production cross sections in the leptonic WW decay mode at $$ \sqrt{s} $$ = 13 TeV
in Journal of High Energy Physics
Sirunyan A
(2021)
Search for W' bosons decaying to a top and a bottom quark at s = 13 TeV in the hadronic final state
in Physics Letters B