STAR HardProbes PWG

[Carl Gagliardi <c-gagliardi AT tamu.edu>]

A voice from the peanut gallery…

 

BHT2 has frequently been used as an Upsilon trigger.  That’s not “jets.”  But it’s still Hard Probes.

 

On the other hand, I can’t speak to whether or not there is continuing interest in Upsilons for Runs 23/25.

 

Stay Healthy!

Carl

 

 

From: Star-hp-l <star-hp-l-bounces AT lists.bnl.gov> On Behalf Of Ma, Rongrong via Star-hp-l
Sent: Monday, June 19, 2023 12:04 PM
To: nihar AT rcf.rhic.bnl.gov
Cc: STAR HardProbes PWG <star-hp-l AT lists.bnl.gov>
Subject: Re: [Star-hp-l] Dimuon and BHT1 at high luminosity in Run 23

 

Hello Nihar I think we have sub-subtructure measurements mentioned in the BUR. Even if not mentioned in the BUR, Run23+25 dataset still provide a great opportunity for jet measurements in general, which is why I asked what HT trigger do people

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Hello Nihar

I think we have sub-subtructure measurements mentioned in the BUR. Even if not mentioned in the BUR, Run23+25 dataset still provide a great opportunity for jet measurements in general, which is why I asked what HT trigger do people usually use for such measurements. 

Best

Rongrong

> On Jun 19, 2023, at 1:00 PM, Nihar Sahoo <nihar AT rcf.rhic.bnl.gov> wrote:

> 

> Hello Rongrong,

> 

> We do not have any hp physics proposal in the past BUR 23-25 documents for AuAu runs for Jet measurements except gamma trigger.

> 

> So I guess no one has plan also to analyze BHT2 trigger.

> 

>> I am not sure who is interested in analyzing BHT1 trigger, but it

>> could at least serve as the bridge between MB and BHT2 triggers for

>> trigger bias evaluation

> It is a good idea. If we need BHT with lower threshold , then BHT1 can serve the purpose.

> 

> 

> Nihar

> 

> 

> On 2023-06-19 21:36, Ma, Rongrong via Star-hp-l wrote:

>> Hello Isaac

>> For the HP-related triggers, what matters is the sampled luminosity

>> rather the number of events. Of course, the ideal case would be

>> sampling full luminosity, but as you noted the rates for dimuon and

>> BHT1 are too high. For BHT2 (Upsilon) and BHT3 (gamma+jet) triggers,

>> we should allocate enough bandwidths such that they can sample the

>> full luminosity.

>> One question: is the BHT2 trigger used for jet measurements in

>> general?

>> For the dimuon trigger, our plan is to tighten the trigger time window

>> cut and apply a pre-scale to reduce it to 1 kHz.

>> I am not sure who is interested in analyzing BHT1 trigger, but it

>> could at least serve as the bridge between MB and BHT2 triggers for

>> trigger bias evaluation.

>> Best

>> Rongrong

>>> On Jun 16, 2023, at 5:38 PM, Mooney, Isaac via Star-hp-l

>>> <star-hp-l AT lists.bnl.gov> wrote:

>>> Hi all,

>>> As I mentioned in the PWG meeting on the 8th, we’ve been asked to

>>> give input on the prescales for HardProbes-related triggers for the

>>> upcoming high-luminosity data-taking period. Specifically, due to

>>> high rates from the dimuon and BHT1 triggers, these may require a

>>> high prescale to limit their bandwidth. Our request is for analyzers

>>> planning to use Run 23 data with these triggers to provide a desired

>>> overall number of events for each trigger in order to meet the

>>> physics goals for the analysis. If we assume a given number of weeks

>>> of running, this then gives a rough estimate of the prescale we

>>> should apply.

>>> I’m also linking my slides from last week

>> (https://urldefense.com/v3/__https://drupal.star.bnl.gov/STAR/system/files/TriggerRates100k_Run23.pdf__;!!KwNVnqRv!FOG0tWzG16D60m3Be4F45v5QXS5FjgGuB_2n21piPyIdiewdfU9SK-OHsopJzmI7MlVV1CCwbYK04xwpCvfhT37TTV5F$)

>>> with a few changes, including a rate table on the last slide

>>> estimated by Akio, along with some back-of-the-envelope calculations

>>> I added for the prescale of these two triggers.

>>> Please let us know if you have any questions or input.

>>> Thanks,

>>> Isaac, Nihar, and Yi _______________________________________________

>>> Star-hp-l mailing list

>>> Star-hp-l AT lists.bnl.gov

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