Question: Two photons flying in opposite directions collide. Let E 1 and E 2 be their energies. (1) Find the minimum value of E 1 to

Two photons flying in opposite directions collide. Let E1 and E2 be their energies. 

(1) Find the minimum value of E1 to allow the process γ1 + γ2 → e+ + e- to occur if E2 = 10 eV. 

(2) Answer the same question if E1 = 2E2. 

(3) Find the centre of mass speed in the latter case. 

(4) Draw the lowest-order Feynman diagram of the process.

Step by Step Solution

★★★★★

3.40 Rating (166 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer
Step: 1 Unlock

1 The required energy for an electron and a positron ... View full answer

blur-text-image
Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock
Step: 3 Unlock

Students Have Also Explored These Related Elementary Particle Physics Questions!

Q:

Two railroad cars, each of mass 7650kg and traveling 95km/h in opposite directions, collide head-on and com to rest. How much thermal energy is produced in this collision?

Q:

In the system shown in Fig. 5.54, block A has mass mA, block B has mass mB' and the rope connecting them has a nonzero mass mole. The rope has a total length L, and the pulley has a very small...

Q:

The last step in the carbon cycle that takes place inside stars is p + 15N 12C + (?). This step releases 5.00 MeV of energy. (a) Show that the reaction product "(?)" must be an a particle. (b)...

Q:

Learning Objectives 3-1 By the end of this section, you will be able to: Explain demand, quantity demanded, and the law of demand Identify a demand curve and a supply curve Explain supply, quantity...

Q:

Chapter 7 Revising and Presenting Your Writing I'm not a very good writer, but I'm an excellent rewriter. James A. Michener Half my life is an act of revision. John Irving Getting Started INT RODU CT...

Q:

Conservation of Momentum PhET Lab Name Topics Momentum Elastic Collisions Inelastic Collisions 1. In Physics, we have some concepts that build rules that define the world around us. Some of the...

Q:

Applied Mathematics and Computation 95 (1998) 181192 Love dynamics: The case of linear couples Sergio Rinaldi 1 Centro Teoria dei Sistemi, CNR, Politecnico di Milano, Via Ponzio 34/5, 20133 Milan,...

Q:

This text was adapted by The Saylor Foundation under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 License without attribution as requested by the work's original creator or licensee. 1...

Q:

The experimental result differs from the assumption. The result shows that the ring oscillator frequencies can be grouped into two groups, where the first group is the high frequency group for the...

Q:

1 Exercise 3: Lift and Airfoils The first part of this week's assignment is to choose and research a reciprocating engine powered (i.e. propeller type) aircraft. You will further use your selected...

Q:

Exploring Venus the surface pressure on Venus is 92 am, and the acceleration due to gravity there is 0.894g. In a future exploratory mission, an upright cylindrical tank of benzene is sealed at the...

Q:

You are an Ontario lawyer. One day, an electrician-subcontractor comes into your office and complains. It seems as if the electrician made a contract with a general contractor who builds homes, and...

Q:

What is the difference between a simple event and a joint event?

Q:

(a) Derive the revenue function of the small business.

Q:

Digesting fat produces 9.3 food calories per gram of fat, and typically 80% of this energy goes to heat when metabolized. (One food calorie is 1000 calories and therefore equals 4186 J.) The body...

Q:

An average sleeping person metabolizes at a rate of about 80 W by digesting food or burning fat. Typically, 20% of this energy goes into bodily functions, such as cell repair, pumping blood, and...

Q:

A certain heat engine operating on a Carnot cycle absorbs 150 J of heat per cycle at its hot reservoir at 135C and has a thermal efficiency of 22.0%. (a) How much work does this engine do per cycle?...

Q:

Provide the following analyses pertaining to a portfolio comprised of common stock issued\ by Facebook, Inc. (ticker: "FB") and common stock issued by Alphabet Inc. (ticker: "GOOG")\ (for some of the...

Q:

You have finally saved $10,000 and are ready to make your first investment. You have the three following alternatives for investing that money: Capital Cities abc, inc. bonds with a par value of...

Q:

The cash manager of Verematic, Inc., is contemplating the choice between using a wire transfer and an EDT. He estimates that his investment opportunity rate is 9%. The bank's ECR is currently 4%, and...