SuperB is a high luminosity e + e − collider that will be able to indirectly probe new physics at energy scales far beyond the reach of any man made accelerator planned or in existence. Just as detailed understanding of the Standard Model of particle physics was developed from stringent constraints imposed by flavour changing processes between quarks, the detailed structure of any new physics is severely constrained by flavour processes. In order to elucidate this structure it is necessary to perform a number of complementary studies of a set of golden channels. With these measurements in hand, the pattern of deviations from the Standard Model behavior can be used as a test of the structure of new physics. If new physics is found at the LHC, then the many golden measurements from SuperB will help decode the subtle nature of the new physics. However if no new particles are found at the LHC, SuperB will be able to search for new physics at energy scales up to 10 − 100 TeV. In either scenario, flavour physics measurements that can be made at SuperB play a pivotal role in understanding the nature of physics beyond the Standard Model. Examples for using the interplay between measurements to discriminate New Physics models are discussed in this document.SuperB is a Super Flavour Factory, in addition to studying large samples of B u,d,s , D and τ decays, SuperB has a broad physics programme that includes spectroscopy both in terms of the Standard Model and exotica, and precision measurements of sin 2 θ W . In addition to performing CP violation measurements at the Υ (4S) and φ(3770), SuperB will test CP T in these systems, and lepton universality in a number of different processes. The multitude of rare decay measurements possible at SuperB can be used to constrain scenarios of physics beyond the Standard Model. In terms of other precision tests of the Standard Model, this experiment will be able to perform precision over-constraints of the unitarity triangle through multiple measurements of all angles and sides.

Executive SummaryThis document presents the physics case for bringing SciBar, the fully active, finely segmented tracking detector at KEK, to the FNAL Booster Neutrino Beam (BNB) line. This unique opportunity arose with the termination of K2K beam operations in 2005. At that time, the SciBar detector became available for use in other neutrino beam lines, including the BNB, which has been providing neutrinos to the MiniBooNE experiment since late 2002.The physics that can be done with SciBar/BNB can be put into three categories, each involving several measurements. First are neutrino cross section measurements which are interesting in their own right, including analyses of multi-particle final states, with unprecedented statistics. Second are measurements of processes that represent the signal and primary background channels for the upcoming T2K experiment. Third are measurements which improve existing or planned MiniBooNE analyses and the understanding of the BNB, both in neutrino and antineutrino mode.For each of these proposed measurements, the SciBar/BNB combination presents a unique opportunity or will significantly improve upon current or near-future experiments for several reasons. First, the fine granularity of SciBar allows detailed reconstruction of final states not possible with the MiniBooNE detector. Additionally, the BNB neutrino energy spectrum is a close match to the expected T2K energy spectrum in a region where cross sections are expected to vary dramatically with energy. As a result, the SciBar/BNB combination will provide cross-section measurements in an energy range complementary to MINERνA and complete our knowledge of neutrino cross sections over the entire energy range of interest to the upcoming off-axis experiments.SciBar and BNB have both been built and operated with great success. As a result, the cost of SciBar/BNB is far less than building a detector from scratch and both systems are well understood with existing detailed and calibrated Monte Carlo simulations. The performance expectations assumed in this document are therefore well-grounded in reality and carry little risk of not meeting expectations.This document includes a site optimization study with trade-offs between the excavation costs associated with placing the detector at different angles from the axis of the BNB and the physics which can be performed with the neutrino flux expected at these locations. Table 1 provides a summary of the impact of placing SciBar at these locations on the proposed measurements. The overwhelming conclusion of this study is that an on-axis location presents the best physics case and offsets the additional costs due to excavation. The estimated cost of the detector enclosure at the desired on-axis location is $505K.This proposal requests an extension of the BNB run through the end of FY2007, one year past its currently approved run, regardless of the outcome of the MiniBooNE ν e appearance search. Our schedules show that SciBar would be operational in the BNB within 9 months of initiation of the ...

The use of charge conjugate reactions is implied throughout the paper.

We present a preliminary measurement of CP-violating asymmetries in fully reconstructed B 0 →D (*)± π ∓ and B 0 →D ± ρ ∓ decays in approximately 110 million Υ (4S) → BB decays collected with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. From a maximum likelihood fit to the time-dependent decay distributions we obtain for the CP-violating parameters: a Dπ = −0.032 ± 0.031 (stat.) ± 0.020 (syst.), c Dπ lep = −0.059 ± 0.055 (stat.) ± 0.033 (syst.) on the B 0 →D ± π ∓ sample, a D * π = −0.049 ± 0.031 (stat.) ± 0.020 (syst.), c D * π lep = +0.044 ± 0.054 (stat.) ± 0.033 (syst.) on the B 0 →D * ± π ∓ sample, and a Dρ = −0.005 ± 0.044 (stat.) ± 0.021 (syst.), c Dρ lep = −0.147 ± 0.074 (stat.) ± 0.035 (syst.) on the B 0 →D ± ρ ∓ sample.

A~STRACTWe propose to study reactions of the type p+p~X+p in the kinematical region where the recoil proton has a laboratory momentum below ~300 MeV/c. A solid state counter hodoscope is used to detect proton recoils and measure their momentum and angle. The doubly differential cross section d 2 dt~ (M is the mass of X) can thus be measured for a range -0.100 ~ t ~ -0.0001 and 1 ~ M ~ 6 or 10 BeV. It is proposed that a hydrogen jet be used as a target, exposed to the full proton beam.Data obtained in this way are relevant to various models of high energy collisions, in particular diffraction dissociation and limiting fragmentation. The energy dependence of the cross section should be checked at two energies, at least. The proposal asks for a few cubic feet for the experimental setup, and uses only one part in 10 9 of the beam with no degradation in the quality of the remainder, hence is completely parasitic in nature. The hope then is that, were the model to turn out to be incorrect, the experimental information might still be relevant to physics and not merely increase our heavy load of incomplete or not-understood data.To hopefully achieve the above aim, the model should possibly be extremely simple, intuitive and related to as many current ideas about high energy interactions as possible.We feel that such a phenomenonlogical approach is achieved by the diffractive model, originally extended to inelastic processes by Landau, etc. and more recently by Good and Walker.(One might recall how successfully the optical model had been used to describe elastic "rr-p and p-p scattering by Serber.)Recently, the evidence for inelastic diffractive scattering on free nucleons has been reviewed by one of us (P.F.) at .the Stony Brook Conference on High Energy collisions.-2The existence of such processes at presently available energies is well established. For processes of the type a + b ~ a' + b, where at is a state of many particles, with rest energy M and the same charge, I-spin etc. as a, the following properties are approximately valid:1. ~ is independent of incident energy.2. dq/dM -1mb/l GeV and it is independent of M for 1 <: M <: 2 GeV.3. ~~ -eat, 8 ~ a ~ 10, where t is the momentum transfer to particle b.4. the number of fragments into which at breaks is determined by M and the quantum numbers of a. We would thus propose to measure the two dimensional 2 .distribution function ~t~ for a collision a+b ~ a'+b where b recoils intact with four momentum transfer t and M is the mass of a'. Particle b is obviously limited to being a proton, -3 while particle a can be any hadron out of which a beam could be made. As a first investigation, it appears that the most straight forward experiment is to study p+p ~ anything +p where ,the recoil proton has very small momentum in the laboratory. By limiting the experiment to very small recoil momentum one has the following advantages:a. Explore the region where diffraction dominates.b.. Improve the kinematical separation between target proton recoiling intact and target dissociation....