Springer Theses

Search for the Pentaquark Θ+ via the π−p → K−X Reaction at J-PARC

Authors: Moritsu, Manabu

  • Nominated as an outstanding contribution by Kyoto University's Physics Department in 2015
  • Introduces the current status of the Θ+ pentaquark search
  • Describes details of the experimental apparatus and analysis method of the J-PARC K1.8 beam line and superconducting kaon spectrometer
おすすめポイントをすべて見る

書籍の購入

イーブック 86,86 €
価格の適用国: Japan (小計)
  • ISBN 978-981-10-0012-6
  • ウォーターマーク付、 DRMフリー
  • ファイル形式: EPUB, PDF
  • どの電子書籍リーダーからでもすぐにお読みいただけます。
  • ご購入後、すぐにダウンロードしていただけます。
ハードカバー 102,79 €
価格の適用国: Japan (小計)
  • ISBN 978-981-10-0010-2
  • 個人のお客様には、世界中どこでも配送料無料でお届けします。
  • Usually dispatched within 3 to 5 business days.
この書籍について

This theses reports on an experimental search for an exotic hadron, Θ+(1540) pentaquark, which is a genuine exotic hadron with a five-quark system of uuddsbar. The results of this book support that the existence of Θ+ was strongly constrained. 

The Θ+ pentaquark was searched for via the π- p → K- X reaction using a beam momentum of 2.01 GeV/c at the J-PARC hadron experimental facility, taking advantage of high-statistics and high-resolution compared with previous experiments, some of which claimed the evidence of Θ+. In order to realize a good missing-mass resolution of 2 MeV, the beam spectrometer and superconducting kaon spectrometer were constructed.

No clear peak was observed in the missing mass spectrum of the π- p → K- X reaction, and the upper limit of the production cross section was found to be less than 0.28 μb/sr at the 90% confidence level in a mass region of 1500–1560 MeV/c2. This upper limit is an order of magnitude smaller than that of the previous KEK experiment. Compared with a theoretical calculation using the effective Lagrangian approach, the decay width of Θ+ was evaluated. The upper limits on the decay width were estimated to be 0.36 and 1.9 MeV for the Θ+ spin-parity of 1/2+ and 1/2-, respectively. These are quite small for a width of ordinary hadron resonances, and the existence of Θ+ was strongly constrained and is doubtful.

著者について

Table of contents (6 chapters)

書籍の購入

イーブック 86,86 €
価格の適用国: Japan (小計)
  • ISBN 978-981-10-0012-6
  • ウォーターマーク付、 DRMフリー
  • ファイル形式: EPUB, PDF
  • どの電子書籍リーダーからでもすぐにお読みいただけます。
  • ご購入後、すぐにダウンロードしていただけます。
ハードカバー 102,79 €
価格の適用国: Japan (小計)
  • ISBN 978-981-10-0010-2
  • 個人のお客様には、世界中どこでも配送料無料でお届けします。
  • Usually dispatched within 3 to 5 business days.
Loading...

あなたへのおすすめ

Loading...

書誌情報

Bibliographic Information
Book Title
Search for the Pentaquark Θ+ via the π−p → K−X Reaction at J-PARC
Authors
Series Title
Springer Theses
Copyright
2016
Publisher
Springer Singapore
Copyright Holder
Springer Science+Business Media Singapore
イーブック ISBN
978-981-10-0012-6
DOI
10.1007/978-981-10-0012-6
ハードカバー ISBN
978-981-10-0010-2
Series ISSN
2190-5053
Edition Number
1
Number of Pages
XIII, 123
Number of Illustrations and Tables
38 b/w illustrations, 48 illustrations in colour
Topics