Search for the Rare Decay K(L) ---] Pi0 Pi0 Gamma
Search for the Rare Decay K(L) ---] Pi0 Pi0 Gamma

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Publisher:

Published: 2007

Total Pages: 4

ISBN-13:

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The KTeV E799 experiment has conducted a search for the rare decay K{sub L} 2![pi]°°[gamma] via the topology K{sub L} 2![pi]°[pi]°{sub D}[gamma] (where [pi]°{sub D} 2![gamma]ee−). Due to Bose statistics of the [pi]° pair and the real nature of the photon, the K{sub L} 2![pi]°[pi]°[gamma] decay is restricted to proceed at lowest order by the CP conserving direct emission (DE) of an E2 electric quadrupole photon. The rate of this decay is interesting theoretically since chiral perturbation theory predicts that this process vanishes at level O(p4). Therefore, this mode probes chiral perturbation theory at O(p6). In this paper we report a determination of an upper limit of 2.43 x 10−7 (90% CL) for K{sub L} 2![pi]°[pi]°[gamma]. This is approximately a factor of 20 lower than previous results.

Simultaneous Measurement of KS and KL Decays Into Π+π-γ
Simultaneous Measurement of KS and KL Decays Into Π+π-γ

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With the E731 apparatus at Fermilab, we have simultaneously collected 6859 K(L) and K(S) decays into pi+pi-gamma. Using our sample of over 370000 pi+pi- decays for normalization we have determined that the ratio GAMMA(K0 --> pi+pi-gamma)/GAMMA(K0 --> pi+pi- ) is (23.0 +/- 0.7) x 10( -3) for K(L) and (7.10 +/- 0.22) x 10( -3) for K(S), for photon energies greater than 20 MeV in the kaon center of mass. After removing the inner-bremsstrahlung contribution, we find that the photon energy spectrum of the direct emission decay of the K(L) is consistent with the presence of a vector meson propagator in the form factor.

Nuclear Energy Basic Principles
Nuclear Energy Basic Principles

Author: International Atomic Energy Agency

Publisher:

Published: 2008

Total Pages: 0

ISBN-13: 9789201126085

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Describes the rationale and vision for the peaceful use of nuclear energy. The publication identifies the basic principles that nuclear energy systems must satisfy to fulfil their promise of meeting growing global energy demands.

Cancer-Associated Thrombosis
Cancer-Associated Thrombosis

Author: Alok A. Khorana

Publisher: CRC Press

Published: 2007-09-26

Total Pages: 290

ISBN-13: 1420048007

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Showcasing the expertise of top-tier specialists who contributed to the newly released guidelines for the care of thrombosis in cancer patients, this exciting guide was written and edited by members of the American Society of Clinical Oncology panel, (ASCO), on the prevention and treatment of cancer-associated thrombosis, among others, and provides

Brakke's Mean Curvature Flow
Brakke's Mean Curvature Flow

Author: Yoshihiro Tonegawa

Publisher: Springer

Published: 2019-04-09

Total Pages: 100

ISBN-13: 9811370753

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This book explains the notion of Brakke’s mean curvature flow and its existence and regularity theories without assuming familiarity with geometric measure theory. The focus of study is a time-parameterized family of k-dimensional surfaces in the n-dimensional Euclidean space (1 ≤ k in

Proceedings of International Conference on Big Data, Machine Learning and their Applications
Proceedings of International Conference on Big Data, Machine Learning and their Applications

Author: Shailesh Tiwari

Publisher: Springer

Published: 2021-02-26

Total Pages: 409

ISBN-13: 9789811583766

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This book contains high-quality peer-reviewed papers of the International Conference on Big Data, Machine Learning and their Applications (ICBMA 2019) held at Motilal Nehru National Institute of Technology Allahabad, Prayagraj, India, during 29–31 May 2020. The book provides significant contributions in a structured way so that prospective readers can understand how these techniques are used in finding solutions to complex engineering problems. The book covers the areas of big data, machine learning, bio-inspired algorithms, artificial intelligence and their applications.