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This thesis describes the thorough analysis of the rare B meson decay into φ K* on data taken by the Belle Collaboration at the B-meson-factory KEKB over 10 years. This reaction is very interesting, because it in principle allows the observation of CP-violation effects. In the Standard Model however, no CP violation in this reaction is expected. An observation of CP asymmetries thus immediately implies new physics. This thesis presents an amplitude analysis of this decay and the search for CP violation in detail and discusses methods to solve related problems: The quantification of multivariate dependence and the improvement of numeric evaluation speed of normalization integrals in amplitude analysis. In addition it provides an overview of the theory, experimental setup, (blind) statistical data analysis and estimation of systematic uncertainties.
This thesis describes a high-quality, high-precision method for the data analysis of an interesting elementary particle reaction. The data was collected at the Japanese B-meson factory KEKB with the Belle detector, one of the most successful large-scale experiments worldwide. CP violation is a subtle quantum effect that makes the world look different when simultaneously left and right and matter and antimatter are exchanged. This being a prerequisite for our own world to have developed from the big bang, there are only a few experimental indications of such effects, and their detection requires very intricate techniques. The discovery of CP violation in B meson decays garnered Kobayashi and Maskawa, who had predicted these findings as early as 1973, the 2008 Nobel prize in physics. This thesis describes in great detail what are by far the best measurements of branching ratios and CP violation parameters in two special reactions with two charm mesons in the final state. It presents an in-depth but accessible overview of the theory, phenomenology, experimental setup, data collection, Monte Carlo simulations, (blind) statistical data analysis, and systematic uncertainty studies.
Widely regarded as a classic in its field, Constructing Quarks recounts the history of the post-war conceptual development of elementary-particle physics. Inviting a reappraisal of the status of scientific knowledge, Andrew Pickering suggests that scientists are not mere passive observers and reporters of nature. Rather they are social beings as well as active constructors of natural phenomena who engage in both experimental and theoretical practice. "A prodigious piece of scholarship that I can heartily recommend."—Michael Riordan, New Scientist "An admirable history. . . . Detailed and so accurate."—Hugh N. Pendleton, Physics Today
This book is designed for advanced undergraduate and graduate students in high energy heavy-ion physics. It is relevant for students who will work on topics being explored at RHIC and the LHC. In the first part, the basic principles of these studies are covered including kinematics, cross sections (including the quark model and parton distribution functions), the geometry of nuclear collisions, thermodynamics, hydrodynamics and relevant aspects of lattice gauge theory at finite temperature. The second part covers some more specific probes of heavy-ion collisions at these energies: high mass thermal dileptons, quarkonium and hadronization. The second part also serves as extended examples of concepts learned in the previous part. Both parts contain examples in the text as well as exercises at the end of each chapter.- Designed for students and newcomers to the field- Focuses on hard probes and QCD- Covers all aspects of high energy heavy-ion physics- Includes worked example problems and exercises
From superstring theory to models with extra dimensions to dark matter and dark energy, a range of theoretically stimulating ideas have evolved for physics beyond the standard model. These developments have spawned a new area of physics that centers on the interplay between particle physics and cosmology—astroparticle physics. Providing the necessary theoretical background, Particle and Astroparticle Physics clearly presents the many recent advances that have occurred in these fields. Divided into five parts, the book begins with discussions on group and field theories. The second part summarizes the standard model of particle physics and includes some extensions to the model, such as neutrino masses and CP violation. The next section focuses on grand unified theories and supersymmetry. The book then discusses the general theory of relativity, higher dimensional theories of gravity, and superstring theory. It also introduces various novel ideas and models with extra dimensions and low-scale gravity. The last part of the book deals with astroparticle physics. After an introduction to cosmology, it covers several specialized topics, including baryogenesis, dark matter, dark energy, and brane cosmology. With numerous equations and detailed references, this lucid book explores the new physics beyond the standard model, showing that particle and astroparticle physics will together reveal unique insights in the next era of physics.
Why didn't the matter in our Universe annihilate with antimatter immediately after its creation? The study of CP violation may help to answer this fundamental question. This book presents theoretical tools necessary to understand this phenomenon. Reflecting the explosion of new results over the last decade, this second edition has been substantially expanded. It introduces charge conjugation, parity and time reversal, before describing the Kobayashi-Maskawa (KM) theory for CP violation and our understanding of CP violation in kaon decays. It reveals how the discovery of B mesons has provided a new laboratory to study CP violation with KM theory predicting large asymmetries, and discusses how these predictions have been confirmed since the first edition of this book. Later chapters describe the search for a new theory of nature's fundamental dynamics. This book is suitable for researchers in high energy, atomic and nuclear physics, and the history and philosophy of science.
This is the absorbing account of one of the twentieth century’s most revolutionary discoveries — our first encounter with an essential mystery of the universe. Told by an active participant in this discovery, it is the saga of the search for quarks, the elementary particles lurking within the protons and neutrons of atomic nuclei, which constitute the fundamental basis of matter. Michael Riordan, physicist and author, was present at the key moments in this story. He brings to life the personalities, triumphs and failures of this true-life scientific detective story, vividly portraying the soaring ambitions and clashing egos of modern physicists at work, vying for the coveted Nobel Prize. The Hunting of the Quark gives readers an insider’s perspective on how frontier science actually occurs — the great leaps of imagination, the blind alleys followed, and the final resolution of the mysteries that had to be overcome on the road to unity. Like James Watson’s famous accountThe Double Helix, it has the immediacy and excitement of being on the trail of a monumental discovery — leading to a striking new scientific paradigm, the Standard Model of particle physics. “Many books on the 20th-century revolution in particle physics focus on the startling new notions introduced. Not as much attention is paid to those who dirtied their hands, nursing crotchety accelerator instruments, in order to prove the conjectures. Mr. Riordan, a physicist affiliated with the Stanford Linear Accelerator Center, presents an authoritative account of this less-told tale. A veteran quark-stalker himself, he deftly combines his technical expertise with a journalistic flair, personally acquainting us with many of the men and women who joined in the hunt... Mr. Riordan enables us to behold exactly how physicists work and the tortuous paths that experimentalists must travel to gain just a scrap of insight into the puzzling laws of nature.” — Marcia Bartusiak, The New York Times “A great book that I couldn’t put down even though I knew the plot.” — Sheldon Glashow, Eugene Higgins Professor of Physics, Emeritus, Harvard University, Nobel prize in physics (1979) “Machines two miles long, pieces of matter elusive as lost souls, the likes of Richard Feynman ‘snooping around,’ reputations made and lost on the contumacious front lines of science — what a wonderful mix for a book. Particle physics has seemed arcane, the quark business most of all. Michael Riordan, who lives the story he tells, makes it lively, literate and accessible.” — Richard Rhodes, author of The Making of the Atomic Bomb “Mr. Riordan... understands the physics, but he also has an eye for the human comedy associated with the work. The result is a fine book on elementary particle physics.” — Jeremy Bernstein, The New Yorker “Riordan was an active participant in the search for the enigmatic quark, and his story reflects the excitement, passion and revelation of peeking into nature’s most elusive realm.” — Rudy Rucker, San Francisco Chronicle “An enjoyable book with enough good explanations and clear discussions to make it well worth reading both for the expert in modern high-energy physics and for the general reader.” — Alexander Firestone, Physics Today “A physicist with first-hand experience chasing quarks at the Stanford Linear Accelerator Center (SLAC) relates the high points of the search for those elusive subatomic particles... Riordan builds a suspenseful tale around the neck-and-neck race between MIT/Brookhaven (Sam Ting) and Stanford (Burton Richter) in discovering the J/psi particle... Riordan’s epilogue is eloquent... Readers will... turn to Riordan for a close-in view and astute commentary on a pivotal period in 20th-century physics.” —Kirkus