STAR HardProbes PWG

[Dandan <shendandan AT mail.sdu.edu.cn>]

Hi Barbara, Yi, Nihar, Isaac and all

At yesterday's meeting, it was suggested that we discuss J/ψ polarization conclusions offline. Here I am.

I checked the values and significance of polarization parameters in different pt bin and centrality bin.

λθ significance of deviations from 0 is more than 2σ in the 0.2 < pt < 10. GeV/c in the both frames and in the 0.2 <pt <3. GeV/c in the HX.(The case of integral pt instead of pol0 fit.)

Considering the CS error is much larger, we only focus on pt dependence and centrality dependence in HX.

Regarding the use of pol1 fitting: I should admit that this is just one of our hypothesis and has no relevant physical basis. Since there are no theoretical models yet, we only want to study from the data whether these points are dependent and slope. Note that the conclusion that  wants to apply dependence, and from the fitting result of pol1, its significance is greater than 2σ.

Please let me know your comments.

Please find the slides for request preliminary slides in the link below:  https://drupal.star.bnl.gov/STAR/system/files/jpsiPolarization_RequiePreliminary_1.pdf

Thank you very much！

Best,

Dandan

发件人：Dandan <shendandan AT mail.sdu.edu.cn>
发送日期：2023-08-18 11:06:17
收件人：STAR HardProbes PWG <star-hp-l AT lists.bnl.gov>
抄送人：star-hp-l AT lists.bnl.gov,YiYang <yiyang AT ncku.edu.tw>,Isaac <isaac.mooney AT yale.edu>,Nihar <nihar AT rcf.rhic.bnl.gov>,Qian <yangqian2020 AT sdu.edu.cn>
主题：Request Preliminary: J/ψ polarization in Isobar data

Dear Convenors,

I'm sorry the slides link uploaded for the first time is broken.

Please find the slides for request preliminary in the new link below:

https://drupal.star.bnl.gov/STAR/system/files/Dandan_RequiePreliminary_3.pdf

 Thank you for considering our Preliminary request.

Best,

Dandan

发件人：Dandan via Star-hp-l <star-hp-l AT lists.bnl.gov>
发送日期：2023-08-17 23:48:24
收件人：star-hp-l AT lists.bnl.gov
抄送人：Dandan <shendandan AT mail.sdu.edu.cn>,Qian <yangqian2020 AT sdu.edu.cn>
主题：[Star-hp-l] Request Preliminary: J/ψ polarization in Isobar data

Dear Convenors,

 Please find the slides for request preliminary in the link below:

https://drupal.star.bnl.gov/STAR/system/files/Dandan_RequiePreliminary_1.pdf

 Thank you for considering our Preliminary request.

Best,

Dandan