Measurement of the Lambda(b) polarization and angular parameters in Lambda(b) -> J/psi Lambda decays from pp collisions at root s=7 and 8 TeV
An analysis of the bottom baryon decay Λb → J=ψð→ μþμ−ÞΛð→ pπ−Þ is performed to measure the Λb polarization and three angular parameters in data from pp collisions at ffiffi s p ¼ 7 and 8 TeV, collected by the CMS experiment at the Large Hadron Collider. The Λb polarization is measured to be 0.0...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English English |
| Published: |
American Physical Society
2018
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/70460/ http://irep.iium.edu.my/70460/ http://irep.iium.edu.my/70460/ http://irep.iium.edu.my/70460/1/70460_Measurement%20of%20the%20%CE%9Bb%20polarization%20and%20angular%20parameters_artice.pdf http://irep.iium.edu.my/70460/7/70460_Measurement%20of%20the%20Lambda%28b%29%20polarization_WOS.pdf |
| Summary: | An analysis of the bottom baryon decay Λb → J=ψð→ μþμ−ÞΛð→ pπ−Þ is performed to measure
the Λb polarization and three angular parameters in data from pp collisions at ffiffi
s p ¼ 7 and 8 TeV,
collected by the CMS experiment at the Large Hadron Collider. The Λb polarization is measured to be
0.00 0.06ðstatÞ 0.06ðsystÞ and the parity-violating asymmetry parameter is determined to be
0.14 0.14ðstatÞ 0.10ðsystÞ. The measurements are compared to various theoretical predictions,
including those from perturbative quantum chromodynamics. |
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