Collider Parameters: corrected time for wrong vertex

In summary, the equation presented in the slide is used in collider physics to calculate the corrected time for the wrong vertex. The terms for the initial time of the right vertex and the time of flight from the right vertex are known, but the meaning of the term for the initial time of the wrong vertex, tiWV, is unclear. It is suggested that the difference between tiRV and tiWV is more relevant in studying collisions and the width of the background.
  • #1
charlemagne94
3
0
Hello,

I stumbled across the following equation in a presentation about collider physics:

tcorrWV =(tiRV - tiWV) + (TOFRV - TOFWV),

where tcorrWV is the corrected time for the wrong vertex, tiRV is the initial time of the right vertex, tiRV is the initial time of the wrong vertex, TOFRV is the time of flight from the right vertex, and TOFWV is the time of flight from the wrong vertex.

I believe that tiRV is equal to zero by default, and the time of flight terms can be easily calculated from the kinematics of the collision. But I do not know what tiWV is.

Could someone familiar with collider physics elucidate the meaning of tiWV?

Thanks!

Edit: the presentation can be found at www-cdf.fnal.gov/~dcruz/DanielMasters.pptx
The equation in question is on slide 13.
 
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  • #2
I think tiWV alone is not an interesting quantity - it is better to look at the difference (tiRV - tiWV): The collisions do not occur all at the same time, as the bunch length is finite (I think something like 10cm or .3ns at the LHC, probably similar for the Tevatron). The time difference between those collisions (average 0, but with some width) is relevant for the width of the background shown in slide 12.
 

1. What is the corrected time for wrong vertex in collider parameters?

The corrected time for wrong vertex in collider parameters refers to the time adjustment made to the data collected from a collider experiment in order to account for any discrepancies in the position of the particle interaction vertex. This allows for more accurate analysis of the data and a better understanding of the underlying physics.

2. Why is it important to correct for wrong vertex in collider experiments?

Correcting for wrong vertex in collider experiments is crucial because the position of the interaction vertex can greatly affect the interpretation of the data. If the wrong vertex is used, it can lead to incorrect conclusions about the behavior of particles and the underlying physics. By correcting for this, scientists can ensure the accuracy and reliability of their results.

3. How is the corrected time for wrong vertex determined?

The corrected time for wrong vertex is determined by comparing the observed data with simulations and theoretical predictions. By analyzing the data and accounting for any discrepancies in the position of the vertex, scientists can calculate the corrected time and make adjustments to their measurements accordingly.

4. Can the corrected time for wrong vertex vary for different collider experiments?

Yes, the corrected time for wrong vertex can vary for different collider experiments. This is because the factors that contribute to the discrepancy in the vertex position, such as detector resolution and experimental conditions, can differ between experiments. Therefore, the correction must be tailored to each specific experiment.

5. How does the correction for wrong vertex affect the overall accuracy of collider experiments?

The correction for wrong vertex plays a crucial role in improving the overall accuracy of collider experiments. By accounting for the discrepancies in the vertex position, scientists can reduce uncertainties and improve the precision of their measurements. This ultimately leads to a better understanding of the underlying physics and more reliable results.

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