The study of elementary particles and their interactions (PPGPE Responsive PDRA Call 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. In particular the focus is on the operation of, and data analysis from, three particular experiments: CMS and LHCb at the LHC and the MIGDAL experiment at RAL.
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 the Higgs boson, which provides a unique window onto new physics (NP), and to use such measurements to search for this physics. The di-tau final state provides a unique probe of some of the properties of the Higgs boson and this Higgs decay will be exploited. Greatest sensitivity to new physics comes from the combination of all decay modes and 'combination and interpretation' activities will be another focus of this grant. It will also be possible to extend our searches for long-lived particles and other new phenomena. All CMS posts will support our mission critical M&O activities, in areas where we have the academic leadership.
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, 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 NP. Such NP models predict much larger effects in events involving tau leptons, motivating our proposal to make a world-leading measurement of the tau anomalous magnetic moment.
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. Particular focus in this grant will be given to the first observation of the 'Migdal effect' in nuclear scattering. This effect can be used to extend the sensitivity of these searches to lighter particles.
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 the Higgs boson, which provides a unique window onto new physics (NP), and to use such measurements to search for this physics. The di-tau final state provides a unique probe of some of the properties of the Higgs boson and this Higgs decay will be exploited. Greatest sensitivity to new physics comes from the combination of all decay modes and 'combination and interpretation' activities will be another focus of this grant. It will also be possible to extend our searches for long-lived particles and other new phenomena. All CMS posts will support our mission critical M&O activities, in areas where we have the academic leadership.
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, 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 NP. Such NP models predict much larger effects in events involving tau leptons, motivating our proposal to make a world-leading measurement of the tau anomalous magnetic moment.
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. Particular focus in this grant will be given to the first observation of the 'Migdal effect' in nuclear scattering. This effect can be used to extend the sensitivity of these searches to lighter particles.
Organisations
Publications
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
(2023)
Observation of New O_{c}^{0} States Decaying to the ?_{c}^{+}K^{-} Final State.
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)
Production of ? and ? ' mesons in p p and p Pb collisions
in Physical Review C
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
(2023)
Observation of New Baryons in the ? b - p + p - and ? b 0 p + p - Systems
in Physical Review Letters
Aaij R
(2023)
Search for Rare Decays of D^{0} Mesons into Two Muons.
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
(2023)
Measurement of the ?_{b}^{0}??(1520)µ^{+}µ^{-} Differential Branching Fraction.
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
(2024)
Measurement of C P Violation in B 0 ? ? ( ? l + l - ) K S 0 ( ? p + p - ) Decays
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
(2024)
Enhanced Production of ?_{b}^{0} Baryons in High-Multiplicity pp Collisions at sqrt[s]=13 TeV.
in Physical review letters
Aaij R
(2023)
First Observation of a Doubly Charged Tetraquark and Its Neutral Partner
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
(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)
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)
Observation of a J/?? Resonance Consistent with a Strange Pentaquark Candidate in B^{-}?J/??p[over ¯] Decays.
in Physical review letters
Aaij R
(2024)
Helium identification with LHCb
in Journal of Instrumentation
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)
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 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
(2023)
First observation of the B + ? D s + D s - K + decay
in Physical Review D