The study of elementary particles and their interactions (Consolidated Grant 2022 - 2025)
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 characterize Higgs boson, which provides a unique window onto new physics, and the use of such measurements to search for this physics. It will also be possible to extend our searches for SUSY, dark matter, long-lived particles and other new phenomena including lepton non-universality. The LHCb experiment will offer complementary tests of the Standard Model (SM) 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. Measurements led by the group have revealed deviations from the SM, potentially indicating lepton non-universality and new physics; clarifying the situation is a high priority. The group will also be active in preparing the next generation of CMS and LHCb 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. We have produced first indications for CP violation in the neutrino sector, and future running will shed further light. To fully characterize this CP violation and its role in the observed matter-antimatter asymmetry will require the next generation detectors, DUNE and Hyper-K, in which we are also involved, with development underway. The SoLid experiment will take continue to take data and should settle the very short baseline neutrino anomaly. 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 data-taking will occur during the grant. Heavy neutrino-like particles are predicted in several new physics models and we are continuing R&D towards the SHiP experiment to search for these new particles.
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, along with preparations for the next generation detector. An exciting new venture is that of the AION experiment that will use quantum technologies to probe for ultra light dark matter, and, in time, gravitational waves.
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 those 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 characterize Higgs boson, which provides a unique window onto new physics, and the use of such measurements to search for this physics. It will also be possible to extend our searches for SUSY, dark matter, long-lived particles and other new phenomena including lepton non-universality. The LHCb experiment will offer complementary tests of the Standard Model (SM) 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. Measurements led by the group have revealed deviations from the SM, potentially indicating lepton non-universality and new physics; clarifying the situation is a high priority. The group will also be active in preparing the next generation of CMS and LHCb 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. We have produced first indications for CP violation in the neutrino sector, and future running will shed further light. To fully characterize this CP violation and its role in the observed matter-antimatter asymmetry will require the next generation detectors, DUNE and Hyper-K, in which we are also involved, with development underway. The SoLid experiment will take continue to take data and should settle the very short baseline neutrino anomaly. 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 data-taking will occur during the grant. Heavy neutrino-like particles are predicted in several new physics models and we are continuing R&D towards the SHiP experiment to search for these new particles.
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, along with preparations for the next generation detector. An exciting new venture is that of the AION experiment that will use quantum technologies to probe for ultra light dark matter, and, in time, gravitational waves.
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 those areas.
Organisations
Publications
Aaij R
(2023)
Open charm production and asymmetry in pNe collisions at $$\sqrt{s_{\scriptscriptstyle {\textrm{NN}}}} = 68.5$$ $$\,\text {Ge\hspace{-1.00006pt}V}$$
in The European Physical Journal C
Aaij R
(2023)
Study of the B - ? ? c + ? ¯ c - K - decay
in Physical Review D
Aaij R
(2023)
Measurement of the Branching Fractions B ( B 0 ? p p ¯ p p ¯ ) and B ( B s 0 ? p p ¯ p p ¯ )
in Physical Review Letters
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
(2024)
Observation of Cabibbo-Suppressed Two-Body Hadronic Decays and Precision Mass Measurement of the O_{c}^{0} Baryon.
in Physical review letters
Aaij R
(2023)
Study of charmonium decays to K S 0 K p in the B ? ( K S 0 K p ) K channels
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 a J/?? Resonance Consistent with a Strange Pentaquark Candidate in B^{-}?J/??p[over ¯] Decays.
in Physical review letters
Aaij R
(2023)
Search for K S ( L ) 0 ? µ + µ - µ + µ - decays at LHCb
in Physical Review D
Aaij R
(2023)
Test of Lepton Universality in b?sl^{+}l^{-} Decays.
in Physical review letters
Aaij R
(2023)
Evidence of a J / ? K S 0 Structure in B 0 ? J / ? ? K S 0 Decays
in Physical Review Letters
Aaij R
(2024)
Momentum scale calibration of the LHCb spectrometer
in Journal of Instrumentation
Aaij R
(2023)
Observation of New O_{c}^{0} States Decaying to the ?_{c}^{+}K^{-} Final State.
in Physical review letters
Aaij R
(2023)
A study of $$C\!P$$ violation in the decays $${ {B} ^\pm } \rightarrow [{ {K} ^+} { {K} ^-} { {\uppi } ^+} { {\uppi } ^-} ]_{D} h^{\pm }$$ ($$h = K, \pi $$) and $${ {B} ^\pm } \rightarrow [{ {\uppi } ^+} { {\uppi } ^-} { {\uppi } ^+} { {\uppi } ^-} ]_{D} h^{\pm }$$
in The European Physical Journal C
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
(2024)
Fraction of ? c Decays in Prompt J / ? Production Measured in p Pb Collisions at s NN = 8.16 TeV
in Physical Review Letters
Aaij R
(2023)
Observation of New Baryons in the ? b - p + p - and ? b 0 p + p - Systems
in Physical Review Letters
Aaij R
(2023)
Test of lepton flavor universality using B 0 ? D * - t + ? t decays with hadronic t channels
in Physical Review D
Aaij R
(2024)
Production of ? and ? ' mesons in p p and p Pb collisions
in Physical Review C
Aaij R
(2023)
Measurement of the ?_{b}^{0}??(1520)µ^{+}µ^{-} Differential Branching Fraction.
in Physical review letters
Aaij R
(2023)
Charmonium production in pNe collisions at $$\sqrt{s_{\scriptscriptstyle \text {NN}}} =68.5$$ GeV
in The European Physical Journal C
Aaij R
(2024)
Enhanced Production of ?_{b}^{0} Baryons in High-Multiplicity pp Collisions at sqrt[s]=13 TeV.
in Physical review letters
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
(2023)
Amplitude analysis of B 0 ? D ¯ 0 D s + p - and B + ? D - D s + p + decays
in Physical Review D
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 Rare Decays of D^{0} Mesons into Two Muons.
in Physical review letters
Aaij R
(2023)
Precision Measurement of C P Violation in the Penguin-Mediated Decay B s 0 ? ? ?
in Physical Review Letters
Aaij R
(2024)
Measurement of C P Violation in B 0 ? ? ( ? l + l - ) K S 0 ( ? p + p - ) Decays
in Physical Review Letters
Aaij R
(2023)
First Observation of a Doubly Charged Tetraquark and Its Neutral Partner
in Physical Review Letters
Aaij R
(2024)
Helium identification with LHCb
in Journal of Instrumentation
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
(2023)
First observation of the B + ? D s + D s - K + decay
in Physical Review D
Aalbers J
(2023)
Search for new physics in low-energy electron recoils from the first LZ exposure
in Physical Review D
Aalbers J
(2022)
A next-generation liquid xenon observatory for dark matter and neutrino physics
in Journal of Physics G: Nuclear and Particle Physics
Aalbers J
(2023)
First Dark Matter Search Results from the LUX-ZEPLIN (LZ) Experiment
in Physical Review Letters
Aalbers J
(2023)
Background determination for the LUX-ZEPLIN dark matter experiment
in Physical Review D
Abe K
(2023)
Measurements of the ? µ and ? ¯ µ -induced coherent charged pion production cross sections on C 12 by the T2K experiment
in Physical Review D
Abe K
(2023)
Measurements of neutrino oscillation parameters from the T2K experiment using 3.6×1021 protons on target.
in The European physical journal. C, Particles and fields
Abe K
(2023)
Updated T2K measurements of muon neutrino and antineutrino disappearance using 3.6 × 10 21 protons on target
in Physical Review D
Abed Abud A
(2023)
Impact of cross-section uncertainties on supernova neutrino spectral parameter fitting in the Deep Underground Neutrino Experiment
in Physical Review D
Abed Abud A
(2023)
Highly-parallelized simulation of a pixelated LArTPC on a GPU
in Journal of Instrumentation
Abed Abud A
(2022)
Separation of track- and shower-like energy deposits in ProtoDUNE-SP using a convolutional neural network
in The European Physical Journal C
Abud A
(2023)
Reconstruction of interactions in the ProtoDUNE-SP detector with Pandora
in The European Physical Journal C
Abud A
(2023)
Identification and reconstruction of low-energy electrons in the ProtoDUNE-SP detector
in Physical Review D
Bogomilov M
(2022)
Multiple Coulomb scattering of muons in lithium hydride
in Physical Review D
Buchmueller O
(2023)
Large-scale atom interferometry for fundamental physics
in Contemporary Physics
Harada M
(2023)
Search for Astrophysical Electron Antineutrinos in Super-Kamiokande with 0.01% Gadolinium-loaded Water
in The Astrophysical Journal Letters
Hayrapetyan A
(2023)
Observation of four top quark production in proton-proton collisions at s = 13 TeV
in Physics Letters B
Hayrapetyan A
(2024)
Search for Scalar Leptoquarks Produced via t -Lepton-Quark Scattering in p p Collisions at s = 13 TeV
in Physical Review Letters