東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

Measurement of the branching ratio f...

Brudvik, Jason William.

FindBook

Google Book

Amazon

博客來

Measurement of the branching ratio for eta-meson decay into a neutral pion and two photons.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Measurement of the branching ratio for eta-meson decay into a neutral pion and two photons./
作者:	Brudvik, Jason William.
面頁冊數:	120 p.
附註:	Adviser: M. K. Nefkens.
Contained By:	Dissertation Abstracts International68-07B.
標題:	Physics, Elementary Particles and High Energy. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3272253
ISBN:	9780549130093

Measurement of the branching ratio for eta-meson decay into a neutral pion and two photons.
Brudvik, Jason William.

Measurement of the branching ratio for eta-meson decay into a neutral pion and two photons. - 120 p.

Adviser: M. K. Nefkens.

Thesis (Ph.D.)--University of California, Los Angeles, 2007.

This dissertation presents the results of a measurement of the branching ratio for the rare decay eta → pi0gammagamma. The experiment was carried out in the A2 hall of the Mainz Microtron facility at the Institut fur Kernphysik, on the campus of Johannes Gutenberg Universitat Mainz, in Mainz, Germany. The experiment used the Glasgow-Mainz Tagger, which is a recoil-electron spectrometer, to determine the energy of the incident photons. The principal detector is the Crystal Ball, a highly segmented multiphoton spectrometer covering nearly 4pi steradians surrounding the experimental target. There is also a forward detector, TAPS, which is a multiphoton spectrometer arranged as a downstream wall of detectors. Furthermore, our setup includes an instrument used to differentiate between charged and neutral particles called the Particle Identification Detector, and a liquid hydrogen target. The kinematic-fit technique was used to select the eta → pi 0gammagamma events. The major backgrounds, namely eta → 3pi0 and eta → gammagamma decay and 2pi 0 production were measured simultaneously. The result for the branching ratio is BR(eta → pi0gammagamma) = (2.0+/-0.7) x 10-4. This corresponds to a partial width of Gamma (eta → pi0gammagamma) = 0.26 +/- 0.10 eV. This result is somewhat smaller than the result of recent experiments, it is consistent with theoretical calculations based on Chiral Perturbation Theory.

ISBN: 9780549130093Subjects--Topical Terms:

1019488
Physics, Elementary Particles and High Energy.

Measurement of the branching ratio for eta-meson decay into a neutral pion and two photons.
LDR:02332nam 2200265 a 45 001 969714
005 20110920
008 110921s2007 eng d
020 $a 9780549130093
035 $a (UMI)AAI3272253
035 $a AAI3272253
040 $a UMI $c UMI
100 1 $a Brudvik, Jason William. $3 1293771
245 1 0 $a Measurement of the branching ratio for eta-meson decay into a neutral pion and two photons.
300 $a 120 p.
500 $a Adviser: M. K. Nefkens.
500 $a Source: Dissertation Abstracts International, Volume: 68-07, Section: B, page: .
502 $a Thesis (Ph.D.)--University of California, Los Angeles, 2007.
520 $a This dissertation presents the results of a measurement of the branching ratio for the rare decay eta → pi0gammagamma. The experiment was carried out in the A2 hall of the Mainz Microtron facility at the Institut fur Kernphysik, on the campus of Johannes Gutenberg Universitat Mainz, in Mainz, Germany. The experiment used the Glasgow-Mainz Tagger, which is a recoil-electron spectrometer, to determine the energy of the incident photons. The principal detector is the Crystal Ball, a highly segmented multiphoton spectrometer covering nearly 4pi steradians surrounding the experimental target. There is also a forward detector, TAPS, which is a multiphoton spectrometer arranged as a downstream wall of detectors. Furthermore, our setup includes an instrument used to differentiate between charged and neutral particles called the Particle Identification Detector, and a liquid hydrogen target. The kinematic-fit technique was used to select the eta → pi 0gammagamma events. The major backgrounds, namely eta → 3pi0 and eta → gammagamma decay and 2pi 0 production were measured simultaneously. The result for the branching ratio is BR(eta → pi0gammagamma) = (2.0+/-0.7) x 10-4. This corresponds to a partial width of Gamma (eta → pi0gammagamma) = 0.26 +/- 0.10 eV. This result is somewhat smaller than the result of recent experiments, it is consistent with theoretical calculations based on Chiral Perturbation Theory.
590 $a School code: 0031.
650 4 $a Physics, Elementary Particles and High Energy. $3 1019488
690 $a 0798
710 2 0 $a University of California, Los Angeles. $3 626622
773 0 $t Dissertation Abstracts International $g 68-07B.
790 $a 0031
790 1 0 $a Nefkens, M. K., $e advisor
791 $a Ph.D.
792 $a 2007
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3272253