Design of an Asymmetric Super-B Factory

2011

The SuperB international team continues to optimize the design of an electron-positron collider, which will allow the enhanced study of the origins of flavor physics. The project combines the best features of a linear collider (high single-collision luminosity) and a storage-ring collider (high repetition rate), bringing together all accelerator physics aspects to make a very high luminosity of 10³⁶ cm⁻² sec⁻¹. This asymmetric-energy collider with a polarized electron beam will produce hundreds of millions of B-mesons at the Υ(4S) resonance. The present design is based on extremely low emittance beams colliding at a large Piwinski angle to allow very low β*{sub y} without the need for ultra short bunches. Use of crab-waist sextupoles will enhance the luminosity, suppressing dangerous resonances and allowing for a higher beam-beam parameter. The project has flexible beam parameters, improved dynamic aperture, and spin-rotators in the Low Energy Ring for longitudinal polari...

2007

The primary physics goals of a high luminosity e+e- flavor factory are discussed, including the possibilities to perform detailed studies of the CKM mechanism of quark mixing, and constrain virtual Higgs and non-standard model particle contributions to the dynamics of rare B_{u,d,s} decays. The large samples of D mesons and tau leptons produced at a flavor factory will result in

The SuperB international team continues to optimize the design of an electron-positron collider, which will allow the enhanced study of the origins of flavor physics. The project combines the best features of a linear collider (high singlecollision luminosity) and a storage-ring collider (high repetition rate), bringing together all accelerator physics aspects to make a very high luminosity of 10 36 cm −2 sec −1 . This asymmetric-energy collider with a polarized electron beam will produce hundreds of millions of B-mesons at the Υ(4S) resonance. The present design is based on extremely low emittance beams colliding at a large Piwinski angle to allow very low β y without the need for ultra short bunches. Use of crab-waist sextupoles will enhance the luminosity, suppressing dangerous resonances and allowing for a higher beam-beam parameter. The project has flexible beam parameters, improved dynamic aperture, and spin-rotators in the Low Energy Ring for longitudinal polarization of the electron beam at the Interaction Point. Optimized for best colliding-beam performance, the facility may also provide high-brightness photon beams for synchrotron radiation applications.

1989

A high-luminosity asymmetric energy B Factory, proposed as an upgrade to the PEP storage ring at SLAC, provides the best opportunity to study CP violation as a means of testing the consistency of the Standard Model. If the phenomenon of CP violation is explained by the Standard Model simply through the non-zero angles and phase of the Kobayashi-Maskawa matrix, then there are precise relations between the K-M parameters and the various measurable CP-violating asyrrunetries in B meson decay. Should these consistency relations fail, the origin of CP violation must lie outside the Standard Model framework. Our measurements would then lead to the first experiment-driven extensions of the Standard Model. The B Factory will also carry out a varied, high-quality program of studies of other aspects of the physics of b quarks, as well as high-precision measurements in r and charm physics. We describe a detailed series of measurements to be carried out in the first few years at a peak luminosity of 3 x 10 33 cm-2 sec-1 , the initial luminosity goal of the B Factory, as well as the program accessible to a larger data sample. Work supported in part by the Department of Energy under contracts DE-AC03-76SF00515, DE-AC03-76SF00098 and DE-AC03 c 81-ER40050

Zeitschrift f�r Physik C Particles and Fields, 1988

The total production rates for heavy quark pairs due to gauge boson fusion processes at high energy ep colliders are evaluated. At HERA, bf production dominates over t f production for m r > 60 GeV and is observable up to m, -~ 80(90) GeV where the number of expected bf events is about 15(10) for ~L = 200 pb-1. Including the contributions from ep WX~btX, the total number of expected b t events amounts to about 50 events for mr-80GeV. The influence of thresholds for heavy quark pair production is also studied for the relevant structure functions Fi(x,Q 2) and shown to contribute to the measured scaling violations. All these effects are sensitive to the heavy quark masses and to the shape of the gluon distribution which can thus be tested experimentally by analyzing heavy quark pair signals.

2008

The sixth SuperB Workshop was convened in response to questions posed by the INFN Review Committee, evaluating the SuperB project at the request of INFN. The working groups addressed the capability of a highluminosity flavor factory that can gather a data sample of 50 to 75 ab −1 in five years to elucidate New Physics phenomena unearthed at the LHC. This report summarizes the results of the Workshop.

2012

Preface ix List of Participants xi Timetable xiii 1 Sterile neutrinos for warm dark matter and the reactor anomaly in flavor symmetry models (Barry) 1 2 Exotic Higgs phenomenology from S 3 flavor symmetry (Bhattacharyya, Leser, Päs) 3 Neutrino Masses and LFV from U(3) 5 → U(2) 5 in SUSY (Blankenburg) 4 On the Roles of V b and Correlations between Flavour Observables in Indirect Searches for New Physics (Buras) 5 On the messenger sector of (SUSY) flavour models (Calibbi) 6 Gravitino Dark Matter with colored NLSP (Covi) 7 Higgs Mediated Lepton Flavour Violation in the Supersymmetric Inverse Seesaw Model (Das) 8 Probing the Flavour Structure of Right-Handed Neutrinos in Left-Right Symmetry at the LHC (Deppisch) 9 TFH Mixing Patterns, Large θ 13 and Δ(96) Flavor Symmetry (Ding) 10 ΔA CP in D-Decays and "Old Physics" (Feldmann) 11 Correlations in Minimal U(2) 3 models and an SO(10) SUSY GUT model facing new data (Girrbach) 12 SU(3)-Flavons and Pati-Salam-GUTs (Hartmann, Kilian, Schnitter) 13 Local Flavor Symmetries (Heeck) 14 Neutrinoless double beta decay at LHC (Helo, Hirsch, Kovalenko, Päs) 107 15 Vacuum Alignment from Group Theory (Holthausen) 115 v 16 Determining Weak Phases from B → J/ ψP Decays (Jung) 17 RS-A 4 , θ 13 and μ → e, 3e (Kadosh) 18 Implications of ΔA CP Measurement for New Physics (Kamenik) 19 Flavour Symmetry Models after Daya Bay and RENO (King) 20 Neutrino Mass Generation by Higher-Dimensional Effective Operators in GUTs (Krauss) 21 LHCb results now and tomorrow (Kreps) 22 Multi-Component Dark Matter System with non-standard annihilation processes of Dark Matter (Aoki, Duerr, Kubo, Takano) 23 The finite subgroups of SU(3) (Ludl) 24 A 4 , θ 13 , and δ CP (Ma) 25 On explicit and spontaneous symmetry breaking-in regard to SU(3) and its finite subgroups (Merle, Zwicky) 26 A SUSY SU(5) × T Unified Model of Flavour with large θ 13 (Meroni) 27 The S 3 flavour symmetry: quarks, leptons and Higgs sectors. (González Canales, A. Mondragón, M. Mondragón, Saldaña Salazar) 28 Predictive Discrete Dark Matter Model (Morisi) 29 Extraction of the CP phase and the life time difference from penguin free tree level B s decays (Nandi) 30 Top FB asymmetry and charge asymmetry in chiral U(1) flavor models (Ko, Omura, Yu) 31 Reactor angle and flavor symmetries (Peinado) 32 Flavour physics from an approximate U(2) 3 symmetry (Sala) 33 Squark Flavor Implications fromB →K (*)  +  − (Schacht) 34 Direct Detection of Leptophilic Dark Matter in a Model with Radiative Neutrino Masses (Schmidt) 35 Spontaneous leptonic CP violation and θ 13 (Serôdio) 36 The quark NNI textures rising from SU(5) × Z 4 symmetry (Simões) 37 Two Approaches for Flavour Models with Large θ 13 (Spinrath) vi Relating neutrino mixing angles to neutrino masses (Tanimoto) 297 2012 status of neutrino oscillation parameters: θ 13 and beyond. (Tórtola) 305 Constraining CP violation in neutral meson mixing with theory input (Freytsis, Ligeti, Turczyk) 315 Enhancing lepton flavor violation with the Z-penguin (Vicente) 323 New Physics constraints from optimized observables in B → K * μ + μ − at large recoil (Descotes-Genon, Matias, Virto) 331 Semileptonic B → K (*) ℓ + ℓ − decays at large hadronic recoil (Wang) 339 New Classically-Stable, Closed Timelike Curves (CTCs) (Ho, Weiler) 347 Squark flavor mixing and CP violation of neutral B mesons at LHCb (Yamamoto)355 RG effects on the CEDM RG effects on the CEDM via CP violating four-Fermi operators (Yang) 363 vii Preface FLASY12 is the second international workshop on flavor symmetries in a series first held in 2011 in Valencia. With the exciting flavor and CP data from the LHC in heavy flavors and the advent of a large θ 13 in 2011 and many new theory ideas emerging "it was just about time" to host a workshop on quark and lepton flavor physics with our research groups in Dortmund. The major incentive for the event was to bring together international experts on the flavor and beyond the Standard Model frontiers to discuss the status of the fields and further new theory and phenomenology driven avenues. These proceedings represent a snapshop of this enterprise as of summer/fall 2012.

2005

This paper is based on the outcome of the activity that has taken place during the recent workshop on "SuperB in Italy" held in Frascati on November 11-12, 2005. The workshop was opened by a theoretical introduction of Marco Ciuchini and was structured in two working groups. One focused on the machine and the other on the detector and experimental issues. * The present status on CP is mainly based on the results achieved by BABAR and Belle. Estabilishment of the indirect CP violation in B sector in 2001 and of the direct CP violation in 2004 thanks to the success of PEP-II and KEKB e + e − asymmetric B Factories operating at the center of mass energy corresponding to the mass of the Υ(4S ). With the two B Factories taking data, the Unitarity Triangle is now beginning to be overconstrained by improving the measurements of the sides and now also of the angles α, and γ. We are also in presence of the very intriguing results about the measurements of sin2β in the time dependent analysis of decay channels via penguin loops, where b → sss and b → sdd. τ physics, in particular LFV search, as well as charm and ISR physics are important parts of the scientific program of a SuperB Factory. The physics case together with possible scenarios for the high luminosity SuperB Factory based on the concepts of the Linear Collider and the related experimental issues are discussed.

Cornell University - arXiv, 2011

The SuperB international team continues to optimize the design of an electron-positron collider, which will allow the enhanced study of the origins of flavor physics. The project combines the best features of a linear collider (high single-collision luminosity) and a storage-ring collider (high repetition rate), bringing together all accelerator physics aspects to make a very high luminosity of 10 36 cm −2 sec −1. This asymmetric-energy collider with a polarized electron beam will produce hundreds of millions of B-mesons at the Υ(4S) resonance. The present design is based on extremely low emittance beams colliding at a large Piwinski angle to allow very low β y without the need for ultra short bunches. Use of crab-waist sextupoles will enhance the luminosity, suppressing dangerous resonances and allowing for a higher beam-beam parameter. The project has flexible beam parameters, improved dynamic aperture, and spin-rotators in the Low Energy Ring for longitudinal polarization of the electron beam at the Interaction Point. Optimized for best colliding-beam performance, the facility may also provide high-brightness photon beams for synchrotron radiation applications.

A highly-asymmetric "ψ ′′ factory" may be the best approach for studying D 0 D 0 mixing. * Submitted to Proc. Snowmass Summer Study on the Future of Particle Physics, Snowmass, Colorado, June 30 -July 21, 2001. † kaplan@fnal.gov