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Flavour Physics beyond the Standard Model

Applicant Crivellin Andreas
Number 154834
Funding scheme Ambizione
Research institution Paul Scherrer Institut
Institution of higher education Paul Scherrer Institute - PSI
Main discipline Particle Physics
Start/End 01.01.2016 - 31.12.2018
Approved amount 549'720.00
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Keywords (10)

Higher dimensional operators; Minimal Supersymmetric Standard Model; Physics beyond the Standard Model; Flavour Physics; Dark Matter; LHC; MEG; Quantum Field Theory; Loop Corrections; Effective Field Theory

Lay Summary (German)

Lead
Die fundamentalen Bausteine der Materie kommen in drei Generationen oder "Flavour" vor. Die Teilchen von verschiedenen Flavour unterscheiden sich nur durch ihre Masse, ansonsten haben sie identische Eigenschaften. Die Flavourphysik untersucht die Übergänge zwischen verschiedenen Generationen. Dazu werden die Vorhersagen des Standard Modells der Teilchenphysik mit den experimentellen Messungen verglichen. Eventuelle Differenzen würden dabei auf neue Physik, also neue, noch unentdeckte Teilchen hinweisen.
Lay summary

Ziel und Inhalt des Forschungsprojekts

Das übergeordnete Ziel des Forschungsprojekts ist ein detaillierteres Verständnis des Einflusses neuer Physik in Flavourobservablen sowohl im Lepton- als auch im Quarksektor. Das Forschungsprojekt beinhaltet zwei unterschiedliche Herangehensweisen: Zum einen wird das supersymmetrische Standardmodel untersucht, zum anderen wird ein modellunabhängiger Ansatz mit Hilfe von höherdimensionalen Operatoren verfolgt. In beiden Ansätzen werden Schleifenkorrekturen in der Quantenfeldtheorie ausgerechnet, um eine bessere Präzision in den theoretischen Vorhersagen zu erreichen. Ein Verknüpfung mit Dunkler Materie ist angedacht.

Wissenschaftlicher und Gesellschaftlicher Kontext

Dieses Projekt trägt zum tieferen, wissenschaftlichen Verständnis der fundamentalen Wechselwirkungen zwischen den Materieteilchen bei. Dadurch können die experimentellen Ergebnisse der Hochenergie- (LHC) und der Präzisions-Teilchenphysik (MEG, BELLE II, etc.) gedeutet werden was signifikanten Einfluss auf unser Weltbild hat.

Direct link to Lay Summary Last update: 15.08.2014

Responsible applicant and co-applicants

Employees

Publications

Publication
Combined explanations of (g−2)μ,e and implications for a large muon EDM
Crivellin Andreas, Hoferichter Martin, Schmidt-Wellenburg Philipp (2018), Combined explanations of (g−2)μ,e and implications for a large muon EDM, in Physical Review D, 98(11), 113002-113002.
Explaining the flavor anomalies with the Pati-Salam leptoquarks
Crivellin Andreas (2018), Explaining the flavor anomalies with the Pati-Salam leptoquarks, in An Alpine LHC Physics Summit, Obergurgl, AustriaPoS, Triest.
Leptoquarks in Flavour Physics
Müller Dario (2018), Leptoquarks in Flavour Physics, in EPJ Web of Conferences, 179, 01015-01015.
$(g-2)μ$, lepton flavor violation, and $Z$ decays with leptoquarks: Correlations and future prospects
Coluccio Leskow Estefania, D'Ambrosio Giancarlo, Crivellin Andreas, Mueller Dario (2017), $(g-2)μ$, lepton flavor violation, and $Z$ decays with leptoquarks: Correlations and future prospects, in Phys. Rev., D95(5), 055018-055018.
$K\to \pi \nu\overline\nu$ in the MSSM in light of the $\epsilon^{\prime}_K/\epsilon_K$ anomaly
Crivellin Andreas, D'Ambrosio Giancarlo, Kitahara Teppei, Nierste Ulrich (2017), $K\to \pi \nu\overline\nu$ in the MSSM in light of the $\epsilon^{\prime}_K/\epsilon_K$ anomaly, in Phys. Rev., D96(1), 015023-015023.
Correlating Lepton Flavour (Universality) Violation in $B$ Decays with $μ\to eγ$ using Leptoquarks
Crivellin Andreas, Mueller Dario, Signer Adrian, Ulrich Yannick (2017), Correlating Lepton Flavour (Universality) Violation in $B$ Decays with $μ\to eγ$ using Leptoquarks, in PRD.
Lepton Flavor Non-Universality in B decays from Dynamical Yukawas
Crivellin Andreas, Fuentes-Martin Javier, Greljo Admir, Isidori Gino (2017), Lepton Flavor Non-Universality in B decays from Dynamical Yukawas, in Phys. Lett., B766, 77-85.
Loop effects of heavy new scalars and fermions in $b\to sμ^+μ^-$
Arnan Pere, Hofer Lars, Mescia Federico, Crivellin Andreas (2017), Loop effects of heavy new scalars and fermions in $b\to sμ^+μ^-$, in JHEP, 04, 043.
Patterns of New Physics in $b\to s\ell^+\ell^-$ transitions in the light of recent data
Capdevila Bernat, Crivellin Andreas, Descotes-Genon Sebastien, Matias Joaquim, Virto Javier (2017), Patterns of New Physics in $b\to s\ell^+\ell^-$ transitions in the light of recent data, in Journal of High Energy Physics.
Probing lepton flavour (universality) violation at NA62 and future kaon experiments
Tunstall Lewis C., Crivellin Andreas, D'Ambrosio Giancarlo, Hoferichter Martin (2017), Probing lepton flavour (universality) violation at NA62 and future kaon experiments, in Part of the KAON series, 012014.
Renormalisation-group improved analysis of $μ\to e$ processes in a systematic effective-field-theory approach
Crivellin Andreas, Davidson Sacha, Pruna Giovanni Marco, Signer Adrian (2017), Renormalisation-group improved analysis of $μ\to e$ processes in a systematic effective-field-theory approach, in JHEP, 05, 117-117.
Simultaneous explanation of $R(D^{(*)}$) and $b\to s\mu^+\mu^-$: the last scalar leptoquarks standing
Crivellin Andreas, Mueller Dario, Ota Toshihiko (2017), Simultaneous explanation of $R(D^{(*)}$) and $b\to s\mu^+\mu^-$: the last scalar leptoquarks standing, in JHEP, 09, 040-040.
SUSY flavour / Flavour sector in BSM scenarios
Crivellin Andreas (2017), SUSY flavour / Flavour sector in BSM scenarios, in 15th Conference on Flavor Physics and CP Violation (FPCP 2017) Prague, Czech Republic, June 5-9, 201, FPCP2017, 030-030.
The MSSM without Gluinos; an Effective Field Theory for the Stop Sector
Aebischer Jason, Crivellin Andreas, Greub Christoph, Yamada Youichi (2017), The MSSM without Gluinos; an Effective Field Theory for the Stop Sector, in Eur. Phys. J., C77(11), 740-740.
$L_μ - L_τ$ theory of Higgs flavor violation and $(g-2)_μ$
Altmannshofer Wolfgang, Carena Marcela, Crivellin Andreas (2016), $L_μ - L_τ$ theory of Higgs flavor violation and $(g-2)_μ$, in Phys. Rev., D94(9), 095026-095026.
1-Loop Matching of gauge invariant dim-6 operators for B decays
Aebischer Jason, Crivellin Andreas, Fael Matteo, Greub Christoph (2016), 1-Loop Matching of gauge invariant dim-6 operators for B decays, in PoS, BEAUTY2016, 064-064.
A two-Higgs-doublet model facing experimental hints
Crivellin Andreas, Heeck Julian, Stoffer Peter (2016), A two-Higgs-doublet model facing experimental hints, in EPJ Web Conf., 118, 01014-01014.
B-anomalies related to leptons and lepton flavour universality violation
Crivellin Andreas (2016), B-anomalies related to leptons and lepton flavour universality violation, in PoS, BEAUTY2016, 042-042.
Effective Field Theory with Two Higgs Doublets
Crivellin Andreas, Ghezzi Margherita, Procura Massimiliano (2016), Effective Field Theory with Two Higgs Doublets, in JHEP, 09, 160-160.
Stop searches in flavourful supersymmetry
Crivellin Andreas, Haisch Ulrich, Tunstall Lewis C. (2016), Stop searches in flavourful supersymmetry, in JHEP, 09, 080-080.
Violation of lepton flavor and lepton flavor universality in rare kaon decays
Crivellin Andreas, D'Ambrosio Giancarlo, Hoferichter Martin, Tunstall Lewis C. (2016), Violation of lepton flavor and lepton flavor universality in rare kaon decays, in Phys. Rev., D93(7), 074038-074038.
New Physics in the Flavour Sector
Crivellin Andreas, New Physics in the Flavour Sector, in Proceedings of: 51st Rencontres de Moriond on QCD and High Energy Interactions.

Collaboration

Group / person Country
Types of collaboration
Giancarlo D'Ambrosio, INFN Neapel Italy (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Martin Hoferichter, University of Washington United States of America (North America)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Julian Heeck, University of Brussles Belgium (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Janusz Rosiek, Universität Warschau Poland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Lars Hofer, Universität Barcelona Spain (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Ulrich Nierste, Universität Karlsruhe Germany (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Exchange of personnel
Christoph Greub, Universität Bern Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Lorenzo Calibbi, Chinese Academy of Science, Beijing China (Asia)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Vincenzo Cirigliano, Los Alamos National Lab United States of America (North America)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Joaquim Matias, Autonoma, Barcelona Spain (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Massimiliano Procura, University of Vienna Austria (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
Herbstschule für Hochenergiephysik Talk given at a conference Leptoquarks in der Flavourphysik 04.09.2018 Maria Laach, Germany Müller Dario;
Impact of B->mumu on New Physics searches Talk given at a conference Summary talk: Conclusions and Outlook 18.12.2017 Villigen, Switzerland Crivellin Andreas;
Seminar at SLAC Individual talk New Physics in B decays 17.11.2017 Stanford, United States of America Crivellin Andreas;
Seminar at University of California, Irvine Individual talk New Physics in the B decays 15.11.2017 Irvine, United States of America Crivellin Andreas;
Seminar at University of California, San Diego Individual talk New Physics in B decays 14.11.2017 San Diego, United States of America Crivellin Andreas;
Seminat at Los Alamos National Laboratory Individual talk New Physics in the Flavour Sector 09.11.2017 Los Alamos, United States of America Crivellin Andreas;
University of Barcelona Individual talk New Physics in the Flavour Sector 25.10.2017 Barcelona, Spain Crivellin Andreas;
Workshop: Flavour and Dark Matter Talk given at a conference The Flavour Portal to Dark Matter 25.09.2017 Heidelberg, Germany Crivellin Andreas;
Flavour Chnaging and conserving processses Talk given at a conference Leptoquarks in flavour physics 07.09.2017 Capri, Italy Müller Dario;
Workshop on Flavour Changing and Conserving Processes Talk given at a conference Leptoquarks in Flavour Physics 07.09.2017 Capri, Italy Müller Dario;
Workshop on the Standard Model and Beyond Talk given at a conference Explaining the Flavour Anomalies with New Physics 02.09.2017 Korfu, Greece Crivellin Andreas;
Joint Annual Meeting of SPS and OPG Talk given at a conference Flavour Physics in the Light of the Recent Anomalies 21.08.2017 Genf, Switzerland Crivellin Andreas;
Gordon Research Conference: Pushing the Frontiers of Particle Physics During the LHC Run II Era Talk given at a conference Flavour Physics in the Light of the Recent Anomalies 25.06.2017 Hongkong, Hongkong Crivellin Andreas;
Seminar at National Taiwan University Individual talk New Physics in the Flavour Sector 21.06.2017 Taipei, Taiwan Crivellin Andreas;
Flavor Physics and CP Violation 2017 Talk given at a conference SUSY avor / Flavor sector in BSM scenarios 05.06.2017 Prag, Czech Republic Crivellin Andreas;
FCC Week 2017 Talk given at a conference Implications of a leptoquark explanation of the anomalous magnetic moment of the muon for the FCC-ee 30.05.2017 Berlin, Germany Müller Dario;
FCC Week 2017 Talk given at a conference Implications of a Leptoquark Explanation of the Anomalous Magnetig Moment of the Muon for the FCC-ee 29.05.2017 Berlin, Germany Müller Dario;
From the Planck Scale to the Electroweak Scale (PLANCK) Talk given at a conference New Physics in the Flavour Sector 22.05.2017 Warschau, Poland Crivellin Andreas;
XIIth Meeting on B Physics, Leptoquarks in Flavour Physics Talk given at a conference Leptoquarks in Flavour Physics 22.05.2017 Naples, Italy Müller Dario;
XIIIth Meeting on B physics Talk given at a conference Leptoquarks in Flavour Physics 22.05.2017 Neapel, Italy Müller Dario;
Instant workshop on B meson anomalies Talk given at a conference Correlations between R(K()) and R(D()) 17.05.2017 Genf, Switzerland Crivellin Andreas;
New Physics and the junction of avour and collider phenomenology Talk given at a conference Explaining the avour anomalies 18.04.2017 Portoroz, Slovenia Crivellin Andreas;
XLIV Rencontres de Moriond, Electroweak Interactions and Unied Theories Talk given at a conference New Physics explanations of the b->smumu anomalies 18.03.2017 La Thuile, Italy Crivellin Andreas;
Les Rencontres de Physique de la Vallee d'Aoste Talk given at a conference New Physics in Flavour Observables 05.03.2017 La Thuile, Italy Crivellin Andreas;
Seminat at Nikfeh Individual talk New Physics in the Flavour Sector 24.01.2017 Amsterdam, Netherlands Crivellin Andreas;
Seminar at INFN Naples Individual talk Lepton Flavour (Universality) Violation and B decays 20.10.2016 Neapel, Italy Crivellin Andreas;
Implications of LHCb measurements and future prospects Talk given at a conference Experimental signatures at LHCb of NP models addressing the B-anomalies 12.10.2016 Genf, Switzerland Crivellin Andreas;
HC2NP: Hadronic Contributions to New Physics Searches Talk given at a conference Experimental signatures at LHCb of NP models addressing the B-anomalies 26.09.2016 Puerto de la Cruz, Spain Crivellin Andreas;
SWHEPPS 2016: Strategy Workshop on High-Energy Particle Physics in Switzerland Talk given at a conference Implications of the avour anomalies 07.06.2016 Aegerisee, Switzerland Crivellin Andreas;
BEAUTY 2016, The 16th International Conference on B-physics at Frontier Machines Talk given at a conference B-Anomalies related to leptons and LFUV 02.05.2016 Marseille, France Crivellin Andreas;
LHCb workshop on semi-tauonic decays Talk given at a conference Lepton Flavour Universality: An Outlook 27.04.2016 Genf, Switzerland Crivellin Andreas;
Rare B decays: Theory and Experiment Talk given at a conference New Physics in b->smumu and b->ctaunu 18.04.2016 Barcelona, Spain Crivellin Andreas;
LHCSKI2016, A first discussion of the 13 TeV results Talk given at a conference New Physics in the favour sector 10.04.2016 Obergurgel, Austria Crivellin Andreas;
XLVII Rencontres de Moriond, QCD and High Energy Interactions Talk given at a conference New Physics in the favour sector 19.03.2016 La Thuile, Italy Crivellin Andreas;
Particle Physics at the Verge of another Discovery Talk given at a conference New Physics in the favour sector 10.01.2016 Aspen, United States of America Crivellin Andreas;
Seminar at the University of Mainz Individual talk B Decays and Lepton Flavour (Universality) Violation 07.01.2016 Mainz, Germany Crivellin Andreas;


Self-organised

Title Date Place
PSI Summer School 2016: Exothiggs 14.08.2016 Zuoz, Switzerland

Knowledge transfer events

Active participation

Title Type of contribution Date Place Persons involved
Das Standardmodell der Teilchenphysik Talk 08.01.2018 Rottweil, Germany Crivellin Andreas;


Communication with the public

Communication Title Media Place Year
Talks/events/exhibitions Das Standardmodell der Teilchenphysik International 2016

Awards

Title Year
SNF Professur 2018

Associated projects

Number Title Start Funding scheme
176884 B Meson Decays and Lepton Flavour Universality Violation 01.01.2019 SNSF Professorships

Abstract

High energy physics is a very dynamic area of research at the moment. The forthcoming results from the Large Hadron Collider (LHC) at CERN will probe our picture of the fundamental physics governing particle interactions and hopefully uncover physics beyond the Standard Model (SM). The SM of particles physics describes three fundamental interactions acting between the constituents of matter, the quarks and leptons. The matter particles, distinguished by their ``flavour" quantum number are grouped into three different generations. Flavour physics studies the transitions between these three generations. In the SM the only source of flavour violation is the Cabibbo-Kobayashi-Maskawa (CKM) matrix. In the current LHC era after the discovery of the SM Higgs the focus of particle physics is on the discovery of new laws of physics beyond the SM. Flavour physics is an excellent tool to probe this new physics (NP). Flavour changing processes, especially flavour changing neutral current (FCNC) processes, are very sensitive to NP because they are highly suppressed (both by small CKM elements and loop-factors) in the SM. Several decays play a prominent role in the study of NP effects in flavour physics: On one hand the data for the processes b->s(d)gamma, Bs->mu mu Kaon mixing, D mixing, mu-> e gamma and mu->eee agree very well with the SM expectation and they put stringent bounds on the flavour structure of physics beyond the SM. On the other hand, there are possible hints towards new physics in B-> (D^*)tau nu and in the anomalous magnetic moment of the muon. Furthermore, the established presence of Dark Matter at astrophysical scales even requires physics beyond the SM. In a specific model of NP, the processes mentioned above are correlated and one cannot only constrain the flavour structure of the model but also study the correlations between the different observables. Furthermore, also in a model independent effective field theory approach in which the SM is supplemented with higher dimensional operators, gauge invariance still enforces correlations among different observables. It is very interesting to investigate if it is possible to explain the deviations from the SM while still being in agreement with all other measurement because this can shed light on the viability of the model under investigation. In such an analysis also the direct constraints from the LHC, electroweak precision observables, Higgs physics and the dark matter (DM) relic abundance in the universe play an important role and should be taken into account. Thus combining flavour physics with collider physics and cosmology is a key strategy in order to discover NP and to map out the theory superseding the SM.The main focus of this proposal is on multi-loop calculation for flavour observables in the Minimal Supersymmetric Standard Model (MSSM) (and possible non-minimal extensions of the Higgs sector) and on calculation in the SM extended with dimension-6 operators which are invariant under the SM gauge group. This proposal is divided into six subprojects:a) 2-loop electroweak corrections to quark-quark-Higgs couplings in the MSSM.b) B-> mu mu at NLO in QCD in the MSSM.c) b-> s gamma at NLO in QCD in the MSSM.d) Flavour-violating Higgs decays in the MSSM and 2HMDs.e) LFV observables in the SM extended with dimension 6 operators.f) Radiative neutrino masses in the R-parity conserving MSSM.
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